10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒          QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2024

or

☐          TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from    to

Commission File Number: 1-33409

T-MOBILE US, INC.

(Exact name of registrant as specified in its charter)

Delaware	20-0836269
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

12920 SE 38th Street

Bellevue, Washington

(Address of principal executive offices)

98006-1350

(Zip Code)

(425)	378-4000
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, par value $0.00001 per share	TMUS	The NASDAQ Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).      Yes ☐ No ☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Shares Outstanding as of April 19, 2024
Common Stock, par value $0.00001 per share	1,171,854,259

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T-Mobile US, Inc.

Form 10-Q

For the Quarter Ended March 31, 2024

Table of Contents

PART I. FINANCIAL INFORMATION
	Item 1.	Financial Statements	3
		Condensed Consolidated Balance Sheets	3
		Condensed Consolidated Statements of Comprehensive Income	4
		Condensed Consolidated Statements of Cash Flows	5
		Condensed Consolidated Statement of Stockholders’ Equity	6
		Notes to the Condensed Consolidated Financial Statements	8
	Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	25
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	42
	Item 4.	Controls and Procedures	42
PART II. OTHER INFORMATION
	Item 1.	Legal Proceedings	43
	Item 1A.	Risk Factors	43
	Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	43
	Item 3.	Defaults Upon Senior Securities	44
	Item 4.	Mine Safety Disclosures	44
	Item 5.	Other Information	44
	Item 6.	Exhibits	45
		Signatures	46

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

T-Mobile US, Inc.

Condensed Consolidated Balance Sheets

(Unaudited)

(in millions, except share and per share amounts)	March 31, 2024		December 31, 2023
Assets
Current assets
Cash and cash equivalents	$	6,708	$	5,135
Accounts receivable, net of allowance for credit losses of $161 and $161	4,253		4,692
Equipment installment plan receivables, net of allowance for credit losses and imputed discount of $614 and $623	4,059		4,456
Inventory	1,521		1,678
Prepaid expenses	715		702
Other current assets	2,039		2,352
Total current assets	19,295		19,015
Property and equipment, net	39,286		40,432
Operating lease right-of-use assets	26,766		27,135
Financing lease right-of-use assets	3,180		3,270
Goodwill	12,234		12,234
Spectrum licenses	97,154		96,707
Other intangible assets, net	2,445		2,618
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount of $143 and $150	1,908		2,042
Other assets	4,000		4,229
Total assets	$	206,268	$	207,682
Liabilities and Stockholders' Equity
Current liabilities
Accounts payable and accrued liabilities	$	7,720	$	10,373
Short-term debt	5,356		3,619
Deferred revenue	846		825
Short-term operating lease liabilities	3,443		3,555
Short-term financing lease liabilities	1,265		1,260
Other current liabilities	1,933		1,296
Total current liabilities	20,563		20,928
Long-term debt	71,361		69,903
Long-term debt to affiliates	1,496		1,496
Tower obligations	3,751		3,777
Deferred tax liabilities	14,187		13,458
Operating lease liabilities	27,827		28,240
Financing lease liabilities	1,163		1,236
Other long-term liabilities	3,846		3,929
Total long-term liabilities	123,631		122,039
Commitments and contingencies (Note 12)
Stockholders' equity
Common stock, par value $0.00001 per share, 2,000,000,000 shares authorized; 1,266,294,032 and 1,262,904,154 shares issued, 1,177,240,110 and 1,195,807,331 shares outstanding	—		—
Additional paid-in capital	67,786		67,705
Treasury stock, at cost, 89,053,922 and 67,096,823 shares	(12,982)		(9,373)
Accumulated other comprehensive loss	(926)		(964)
Retained earnings	8,196		7,347
Total stockholders' equity	62,074		64,715
Total liabilities and stockholders' equity	$	206,268	$	207,682

The accompanying notes are an integral part of these condensed consolidated financial statements.

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T-Mobile US, Inc.

Condensed Consolidated Statements of Comprehensive Income

(Unaudited)

	Three Months Ended March 31,
(in millions, except share and per share amounts)	2024		2023
Revenues
Postpaid revenues	$	12,631	$	11,862
Prepaid revenues	2,403		2,417
Wholesale and other service revenues	1,062		1,267
Total service revenues	16,096		15,546
Equipment revenues	3,251		3,719
Other revenues	247		367
Total revenues	19,594		19,632
Operating expenses
Cost of services, exclusive of depreciation and amortization shown separately below	2,688		3,061
Cost of equipment sales, exclusive of depreciation and amortization shown separately below	4,399		4,588
Selling, general and administrative	5,138		5,425
Gain on disposal group held for sale	—		(42)
Depreciation and amortization	3,371		3,203
Total operating expenses	15,596		16,235
Operating income	3,998		3,397
Other expense, net
Interest expense, net	(880)		(835)
Other income, net	20		9
Total other expense, net	(860)		(826)
Income before income taxes	3,138		2,571
Income tax expense	(764)		(631)
Net income	$	2,374	$	1,940
Net income	$	2,374	$	1,940
Other comprehensive income, net of tax
Reclassification of loss from cash flow hedges, net of tax effect of $15 and $14	43		40
Unrealized gain on foreign currency translation adjustment, net of tax effect of $0, and $0	—		2
Amortization of actuarial gain, net of tax effect of $(2) and $0	(5)		—
Other comprehensive income	38		42
Total comprehensive income	$	2,412	$	1,982
Earnings per share
Basic	$	2.00	$	1.59
Diluted	$	2.00	$	1.58
Weighted-average shares outstanding
Basic	1,185,298,497		1,219,608,362
Diluted	1,189,092,019		1,224,604,698

The accompanying notes are an integral part of these condensed consolidated financial statements.

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T-Mobile US, Inc.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

	Three Months Ended March 31,
(in millions)	2024		2023
Operating activities
Net income	$	2,374	$	1,940
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	3,371		3,203
Stock-based compensation expense	140		177
Deferred income tax expense	715		611
Bad debt expense	282		222
Losses from sales of receivables	21		38
Gain on remeasurement of disposal group held for sale	—		(13)
Changes in operating assets and liabilities
Accounts receivable	(416)		(1,268)
Equipment installment plan receivables	277		152
Inventory	170		129
Operating lease right-of-use assets	856		1,008
Other current and long-term assets	160		(142)
Accounts payable and accrued liabilities	(1,734)		(882)
Short- and long-term operating lease liabilities	(1,017)		(1,009)
Other current and long-term liabilities	(172)		(183)
Other, net	57		68
Net cash provided by operating activities	5,084		4,051
Investing activities
Purchases of property and equipment, including capitalized interest of $(9) and $(14)	(2,627)		(3,001)
Purchases of spectrum licenses and other intangible assets, including deposits	(61)		(73)
Proceeds from sales of tower sites	—		6
Proceeds related to beneficial interests in securitization transactions	890		1,345
Other, net	11		(5)
Net cash used in investing activities	(1,787)		(1,728)
Financing activities
Proceeds from issuance of long-term debt	3,473		3,013
Repayments of financing lease obligations	(327)		(306)
Repayments of long-term debt	(223)		(131)
Repurchases of common stock	(3,594)		(4,619)
Dividends on common stock	(769)		—
Tax withholdings on share-based awards	(192)		(187)
Other, net	(34)		(43)
Net cash used in financing activities	(1,666)		(2,273)
Change in cash and cash equivalents, including restricted cash and cash held for sale	1,631		50
Cash and cash equivalents, including restricted cash and cash held for sale
Beginning of period	5,307		4,674
End of period	$	6,938	$	4,724

The accompanying notes are an integral part of these condensed consolidated financial statements.

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T-Mobile US, Inc.

Condensed Consolidated Statement of Stockholders’ Equity

(Unaudited)

(in millions, except share and per share amounts)	Common Stock Outstanding	Treasury Stock Outstanding	Treasury Shares at Cost		Par Value and Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Retained Earnings (Accumulated Deficit)		Total Stockholders' Equity
Balance as of December 31, 2023	1,195,807,331	67,096,823	$	(9,373)	$	67,705	$	(964)	$	7,347	$	64,715
Net income	—	—	—		—		—		2,374		2,374
Dividends declared ($1.30 per share)	—	—	—		—		—		(1,525)		(1,525)
Other comprehensive income	—	—	—		—		38		—		38
Stock-based compensation	—	—	—		152		—		—		152
Stock issued for employee stock purchase plan	950,082	—	—		112		—		—		112
Issuance of vested restricted stock units	3,525,790	—	—		—		—		—		—
Shares withheld related to net share settlement of stock awards and stock options	(1,171,055)	—	—		(192)		—		—		(192)
Repurchases of common stock	(21,933,790)	21,933,790	(3,604)		—		—		—		(3,604)
Other, net	61,752	23,309	(5)		9		—		—		4
Balance as of March 31, 2024	1,177,240,110	89,053,922	$	(12,982)	$	67,786	$	(926)	$	8,196	$	62,074
Balance as of December 31, 2022	1,233,960,078	22,916,449	$	(3,016)	$	73,941	$	(1,046)	$	(223)	$	69,656
Net income	—	—	—		—		—		1,940		1,940
Other comprehensive income	—	—	—		—		42		—		42
Stock-based compensation	—	—	—		155		—		—		155
Stock issued for employee stock purchase plan	1,063,426	—	—		126		—		—		126
Issuance of vested restricted stock units	3,844,801	—	—		—		—		—		—
Shares withheld related to net share settlement of stock awards and stock options	(1,263,356)	—	—		(187)		—		—		(187)
Repurchases of common stock	(32,963,940)	32,963,940	(4,810)		—		—		—		(4,810)
Other, net	55,316	30,275	(5)		8		—		—		3
Balance as of March 31, 2023	1,204,696,325	55,910,664	$	(7,831)	$	74,043	$	(1,004)	$	1,717	$	66,925

The accompanying notes are an integral part of these condensed consolidated financial statements.

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T-Mobile US, Inc.

Index for Notes to the Condensed Consolidated Financial Statements

Note 1	Summary of Significant Accounting Policies	8
Note 2	Business Combination	8
Note 3	Receivables and Related Allowance for Credit Losses	9
Note 4	Sales of Certain Receivables	11
Note 5	Spectrum License Transactions	13
Note 6	Fair Value Measurements	14
Note 7	Debt	15
Note 8	Tower Obligations	17
Note 9	Revenue from Contracts with Customers	18
Note 10	Stockholder Return Program	20
Note 11	Earnings Per Share	21
Note 12	Commitments and Contingencies	21
Note 13	Additional Financial Information	24
Note 14	Subsequent Events	24

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T-Mobile US, Inc.

Notes to the Condensed Consolidated Financial Statements

Note 1 – Summary of Significant Accounting Policies

Basis of Presentation

The unaudited condensed consolidated financial statements of T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”) include all adjustments of a normal recurring nature necessary for the fair presentation of the results for the interim periods presented. The results for the interim periods are not necessarily indicative of those for the full year. The condensed consolidated financial statements should be read in conjunction with our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2023.

The condensed consolidated financial statements include the balances and results of operations of T-Mobile and our consolidated subsidiaries. We consolidate majority-owned subsidiaries over which we exercise control, as well as variable interest entities (“VIEs”) for which we are deemed to be the primary beneficiary and VIEs, which cannot be deconsolidated, such as those related to our obligations to pay for the management and operation of certain of our wireless communications tower sites. Intercompany transactions and balances have been eliminated in consolidation.

The preparation of financial statements in conformity with United States (“U.S.”) generally accepted accounting principles (“GAAP”) requires our management to make estimates and assumptions that affect the financial statements and accompanying notes. Estimates are based on historical experience, where applicable, and other assumptions that management believes are reasonable under the circumstances. Estimates are inherently subject to judgment and actual results could differ from those estimates.

Accounting Pronouncements Not Yet Adopted

Segment Reporting Disclosures

In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The standard expands reportable segment disclosure requirements for public business entities primarily through enhanced disclosures about significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit (referred to as the “significant expense principle”). The standard will become effective for us for our fiscal year 2024 annual financial statements and interim financial statements thereafter and will be applied retrospectively for all prior periods presented in the financial statements, with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2024 annual financial statements. We are currently evaluating the impact this guidance will have on the disclosures included in the Notes to the Consolidated Financial Statements.

Income Tax Disclosures

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The standard enhances income tax disclosure requirements for all entities by requiring specified categories and greater disaggregation within the rate reconciliation table, disclosure of income taxes paid by jurisdiction, and providing clarification on uncertain tax positions and related financial statement impacts. The standard will be effective for us for our fiscal year 2025 annual financial statements with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2025 annual financial statements, and we expect the adoption of the standard will impact certain of our income tax disclosures.

Note 2 – Business Combination

Acquisition of Ka’ena Corporation

On March 9, 2023, we entered into a Merger and Unit Purchase Agreement (the “Merger and Unit Purchase Agreement”) for the acquisition of 100% of the outstanding equity of Ka’ena Corporation and its subsidiaries, including, among others, Mint Mobile LLC (collectively, “Ka’ena”), for a maximum purchase price of $1.35 billion to be paid out 39% in cash and 61% in shares of T-Mobile common stock (the “Ka’ena Acquisition”). On March 13, 2024, we entered into Amendment No. 1 to the Merger and Unit Purchase Agreement, which amended, among other things, certain mechanics of the payment of the purchase

8

consideration for the Ka’ena Acquisition, which will result in a nominal increase in the percentage of cash compared to shares of T-Mobile common stock to be paid out as part of the total purchase price.

The purchase price is variable, dependent upon specified performance indicators of Ka’ena during certain periods before and after closing, and consists of an upfront payment at closing of the transaction, subject to certain agreed-upon working capital and other adjustments, and a variable earnout payable 24 months after closing of the transaction. Our estimate of the upfront payment is subject to Ka’ena’s underlying business performance and the timing of transaction close, and is currently estimated to be $1.2 billion, before working capital and other adjustments, which we currently estimate will result in a net upfront payment of approximately $950 million, with approximately 45% to be paid in cash. Subsequent to March 31, 2024, on April 25, 2024, we received all necessary regulatory approvals and the Ka’ena Acquisition is expected to close on May 1, 2024.

Note 3 – Receivables and Related Allowance for Credit Losses

We maintain an allowance for credit losses by applying an expected credit loss model. Each period, management assesses the appropriateness of the level of allowance for credit losses by considering credit risk inherent within each portfolio segment as of the end of the period.

We consider a receivable past due when a customer has not paid us by the contractually specified payment due date. Account balances are written off against the allowance for credit losses if collection efforts are unsuccessful and the receivable balance is deemed uncollectible (customer default), based on factors such as customer credit ratings as well as the length of time the amounts are past due.

Our portfolio of receivables is comprised of two portfolio segments: accounts receivable and equipment installment plan (“EIP”) receivables.

Accounts Receivable Portfolio Segment

Accounts receivable balances are predominately comprised of amounts currently due from customers (e.g., for wireless communications services), device insurance administrators, wholesale partners, other carriers and third-party retail channels.

We estimate credit losses associated with our accounts receivable portfolio segment using an expected credit loss model, which utilizes an aging schedule methodology based on historical information and is adjusted for asset-specific considerations, current economic conditions and reasonable and supportable forecasts.

Our approach considers a number of factors, including our overall historical credit losses and payment experience, as well as current collection trends such as write-off frequency and severity. We also consider other qualitative factors such as current and forecasted macroeconomic conditions.

We consider the need to adjust our estimate of credit losses for reasonable and supportable forecasts of future macroeconomic conditions. To do so, we monitor external forecasts of changes in real U.S. gross domestic product and forecasts of consumer credit behavior for comparable credit exposures.

EIP Receivables Portfolio Segment

Based upon customer credit profiles at the time of customer origination, as well as subsequent credit performance, we classify the EIP receivables segment into two customer classes of “Prime” and “Subprime.” Prime customer receivables are those with lower credit risk, and Subprime customer receivables are those with higher credit risk. Customers may be required to make a down payment on their equipment purchases if their assessed credit risk exceeds established underwriting thresholds. In addition, certain customers within the Subprime category may be required to pay a deposit.

To determine a customer’s credit profile and assist in determining their credit class, we use a proprietary credit scoring model that measures the credit quality of a customer leveraging several factors, such as credit bureau information and consumer credit risk scores, as well as service and device plan characteristics.

EIP receivables had a combined weighted-average effective interest rate of 11.1% and 10.6% as of March 31, 2024, and December 31, 2023, respectively.

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The following table summarizes the EIP receivables, including imputed discounts and related allowance for credit losses:

(in millions)	March 31, 2024		December 31, 2023
EIP receivables, gross	$	6,724	$	7,271
Unamortized imputed discount	(489)		(505)
EIP receivables, net of unamortized imputed discount	6,235		6,766
Allowance for credit losses	(268)		(268)
EIP receivables, net of allowance for credit losses and imputed discount	$	5,967	$	6,498
Classified on our condensed consolidated balance sheets as:
Equipment installment plan receivables, net of allowance for credit losses and imputed discount	$	4,059	$	4,456
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount	1,908		2,042
EIP receivables, net of allowance for credit losses and imputed discount	$	5,967	$	6,498

Many of our loss estimation techniques rely on delinquency-based models; therefore, delinquency is an important indicator of credit quality in the establishment of our allowance for credit losses for EIP receivables. We manage our EIP receivables portfolio segment using delinquency and customer credit class as key credit quality indicators.

The following table presents the amortized cost of our EIP receivables by delinquency status, customer credit class and year of origination as of March 31, 2024:

	Originated in 2024				Originated in 2023				Originated prior to 2023				Total EIP Receivables, Net of Unamortized Imputed Discount
(in millions)	Prime		Subprime		Prime		Subprime		Prime		Subprime		Prime		Subprime		Total
Current - 30 days past due	$	1,188	$	360	$	2,923	$	730	$	721	$	203	$	4,832	$	1,293	$	6,125
31 - 60 days past due	3		4		12		16		4		4		19		24		43
61 - 90 days past due	—		1		10		15		4		3		14		19		33
More than 90 days past due	—		—		9		15		6		4		15		19		34
EIP receivables, net of unamortized imputed discount	$	1,191	$	365	$	2,954	$	776	$	735	$	214	$	4,880	$	1,355	$	6,235

We estimate credit losses on our EIP receivables segment by applying an expected credit loss model, which relies on historical loss data adjusted for current conditions to calculate default probabilities or an estimate for the frequency of customer default. Our assessment of default probabilities or frequency includes receivables delinquency status, historical loss experience, how long the receivables have been outstanding and customer credit ratings, as well as customer tenure. We multiply these estimated default probabilities by our estimated loss given default, which is the estimated amount of default or the severity of loss.

As we do for our accounts receivable portfolio segment, we consider the need to adjust our estimate of credit losses on EIP receivables for reasonable and supportable forecasts of economic conditions through monitoring external forecasts and periodic internal statistical analyses.

The following table presents write-offs of our EIP receivables by year of origination for the three months ended March 31, 2024:

(in millions)	Originated in 2024		Originated in 2023		Originated prior to 2023		Total Write-offs
Write-offs	$	2	$	114	$	34	$	150

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Activity for the three months ended March 31, 2024 and 2023, in the allowance for credit losses and unamortized imputed discount balances for the accounts receivable and EIP receivables segments were as follows:

	March 31, 2024						March 31, 2023
(in millions)	Accounts Receivable Allowance		EIP Receivables Allowance		Total		Accounts Receivable Allowance		EIP Receivables Allowance		Total
Allowance for credit losses and imputed discount, beginning of period	$	161	$	773	$	934	$	167	$	811	$	978
Bad debt expense	132		150		282		107		115		222
Write-offs	(132)		(150)		(282)		(122)		(140)		(262)
Change in imputed discount on short-term and long-term EIP receivables	N/A		31		31		N/A		54		54
Impact on the imputed discount from sales of EIP receivables	N/A		(47)		(47)		N/A		(54)		(54)
Allowance for credit losses and imputed discount, end of period	$	161	$	757	$	918	$	152	$	786	$	938

Off-Balance-Sheet Credit Exposures

We do not have material off-balance-sheet credit exposures as of March 31, 2024. In connection with the sales of certain service accounts receivable and EIP receivables pursuant to the sale arrangements, we have deferred purchase price assets included on our Condensed Consolidated Balance Sheets measured at fair value that are based on a discounted cash flow model using Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. See Note 4 – Sales of Certain Receivables for further information.

Note 4 – Sales of Certain Receivables

We regularly enter into transactions to sell certain service accounts receivable and EIP receivables. The transactions, including our continuing involvement with the sold receivables and the respective impacts to our condensed consolidated financial statements, are described below.

Sales of EIP Receivables

Overview of the Transaction

In 2015, we entered into an arrangement to sell certain EIP receivables on a revolving basis (the “EIP Sale Arrangement”), which has been revised and extended from time to time. As of both March 31, 2024, and December 31, 2023, the EIP Sale Arrangement provided funding of $1.3 billion.

In connection with this EIP Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “EIP BRE”). We consolidate the EIP BRE under the VIE model.

The following table summarizes the carrying amounts and classification of assets, which consist primarily of the deferred purchase price, included on our Condensed Consolidated Balance Sheets with respect to the EIP BRE:

(in millions)	March 31, 2024		December 31, 2023
Other current assets	$	330	$	348
Other assets	95		103

Sales of Service Accounts Receivable

Overview of the Transaction

In 2014, we entered into an arrangement to sell certain service accounts receivable on a revolving basis (the “Service Receivable Sale Arrangement”). On February 27, 2024, we extended the scheduled expiration date of the Service Receivable Sale Arrangement to February 25, 2025. As of both March 31, 2024, and December 31, 2023, the Service Receivable Sale Arrangement provided funding of $775 million.

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In connection with the Service Receivable Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity, to sell service accounts receivable (the “Service BRE”). We consolidate the Service BRE under the VIE model.

The following table summarizes the carrying amounts and classification of assets, which consist primarily of the deferred purchase price, and liabilities included on our Condensed Consolidated Balance Sheets with respect to the Service BRE:

(in millions)	March 31, 2024		December 31, 2023
Other current assets	$	164	$	209
Other current liabilities	423		373

Sales of Receivables

The following table summarizes the impact of the sale of certain service accounts receivable and EIP receivables on our Condensed Consolidated Balance Sheets:

(in millions)	March 31, 2024		December 31, 2023
Derecognized net service accounts receivable and EIP receivables	$	2,249	$	2,388
Other current assets	494		557
of which, deferred purchase price	491		555
Other long-term assets	95		103
of which, deferred purchase price	95		103
Other current liabilities	423		373
Net cash proceeds since inception	1,554		1,583
Of which:
Change in net cash proceeds during the year-to-date period	(29)		(114)
Net cash proceeds funded by reinvested collections	1,583		1,697

At inception, we elected to measure the deferred purchase price at fair value with changes in fair value included in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income. The fair value of the deferred purchase price is determined based on a discounted cash flow model which uses primarily Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. As of March 31, 2024, and December 31, 2023, our deferred purchase price related to the sales of service accounts receivable and EIP receivables was $586 million and $658 million, respectively.

We recognized losses from sales of receivables, including changes in fair value of the deferred purchase price, of $21 million and $38 million for the three months ended March 31, 2024 and 2023, respectively, in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income.

Continuing Involvement

Pursuant to the sale arrangements described above, we have continuing involvement with the service accounts receivable and EIP receivables we sell as we service the receivables, are required to repurchase certain receivables, including ineligible receivables, aged receivables and receivables where a write-off is imminent, and may be responsible for absorbing credit losses through reduced collections on our deferred purchase price assets. We continue to service the customers and their related receivables, including facilitating customer payment collection, in exchange for a monthly servicing fee. As the receivables are sold on a revolving basis, the customer payment collections on sold receivables may be reinvested in new receivable sales. At the direction of the purchasers of the sold receivables, we apply the same policies and procedures while servicing the sold receivables as we apply to our owned receivables, and we continue to maintain normal relationships with our customers.

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Note 5 – Spectrum License Transactions

The following table summarizes our spectrum license activity for the three months ended March 31, 2024:

(in millions)	2024
Spectrum licenses, beginning of year	$	96,707
Spectrum license acquisitions	411
Spectrum licenses transferred to held for sale	(17)
Costs to clear spectrum	53
Spectrum licenses, end of period	$	97,154

Cash payments to acquire spectrum licenses and payments for costs to clear spectrum are included in Purchases of spectrum licenses and other intangible assets, including deposits, on our Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2024.

Spectrum Transactions

In September 2022, the Federal Communications Commission (“FCC”) announced that we were the winning bidder of 7,156 licenses in Auction 108 (2.5 GHz spectrum) for an aggregate price of $304 million. At inception of Auction 108 in June 2022, we deposited $65 million. We paid the FCC the remaining $239 million for the licenses won in the auction in September 2022. On February 29, 2024, the FCC issued to us the licenses won in Auction 108, and substantially all of these licenses were deployed in March 2024. The licenses are included in Spectrum licenses on our Condensed Consolidated Balance Sheets as of March 31, 2024.

License Purchase Agreements

DISH Network Corporation

On July 1, 2020, we and DISH Network Corporation (“DISH”) entered into a license purchase agreement (the “DISH License Purchase Agreement”) pursuant to which DISH agreed to purchase certain 800 MHz spectrum licenses for a total of approximately $3.6 billion. The closing of the sale of spectrum under the DISH License Purchase Agreement remains subject to FCC approval. On October 15, 2023, we and DISH entered into an amendment (the “LPA Amendment”) to the DISH License Purchase Agreement pursuant to which, among other things, the parties agreed that (1) DISH will pay us a $100 million non-refundable extension fee (in lieu of the approximately $72 million termination fee that had previously been agreed to), (2) the closing for the purchase of the spectrum licenses by DISH will occur no later than April 1, 2024, (3) if DISH has not purchased the spectrum licenses by such date for any reason (including failure to receive the required FCC approval prior to such date), then the DISH License Purchase Agreement will automatically terminate, and we will retain the $100 million extension fee, (4) if DISH does purchase the spectrum by April 1, 2024, the $100 million extension fee will be credited against the $3.6 billion purchase price, and (5) we are permitted to commence auction of the spectrum prior to April 1, 2024 at our discretion (and subject to DISH’s purchase right). The LPA Amendment was approved by the Court and became effective on October 23, 2023. On October 25, 2023, we received a payment of $100 million from DISH for the extension fee and recorded a corresponding liability within Other current liabilities on our Condensed Consolidated Balance Sheets.

Subsequent to March 31, 2024, DISH did not purchase the 800 MHz spectrum by April 1, 2024. As such, we will recognize a gain for the $100 million extension fee previously paid by DISH in the second quarter of 2024 within Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income and relieve the liability that was initially recorded upon receipt of the payment. Additionally, we have commenced an auction process for the disposition of the spectrum as required under the final judgment agreed to by us, Deutsche Telekom AG (“DT”), Sprint LLC, SoftBank Group Corp. (“SoftBank”) and DISH with the U.S. District Court for the District of Columbia, which was approved by the Court on April 1, 2020. If the specified minimum price of $3.6 billion is not met in the auction, we would be relieved of the obligation to sell the licenses.

Channel 51 License Co LLC and LB License Co, LLC

On August 8, 2022, we, Channel 51 License Co LLC and LB License Co, LLC (together with Channel 51 License Co LLC, the “Sellers”) entered into License Purchase Agreements pursuant to which we will acquire spectrum in the 600 MHz band from the Sellers in exchange for total cash consideration of $3.5 billion. The licenses will be acquired without any associated networks and are currently being utilized by us through exclusive leasing arrangements with the Sellers.

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On March 30, 2023, we and the Sellers entered into Amended and Restated License Purchase Agreements pursuant to which we and the Sellers agreed to separate the transaction into two tranches of licenses, with the closings on the acquisitions of certain licenses in Chicago, Dallas and New Orleans being deferred in order to potentially expedite the regulatory approval process for the remainder of the licenses. Subsequently, on August 25, 2023, we and the Sellers entered into Amendments No. 1 to the Amended and Restated License Purchase Agreements, which deferred the closings of certain additional licenses in Chicago and Dallas into the second closing tranche. Together, the licenses with closings deferred into the second closing tranche represent $1.1 billion of the aggregate $3.5 billion cash consideration. The licenses being acquired by us, and the total consideration being paid for the licenses, remain the same under the original License Purchase Agreements and subsequent amendments.

The FCC approved the purchase of the first tranche on December 29, 2023, and we expect the closing of the first tranche to occur in the second quarter of 2024, with the associated cash payment expected to occur in the third quarter of 2024. We anticipate that the second closing (on the deferred licenses) will occur in late 2024 or early 2025.

The parties have agreed that each of the closings will occur within 180 days after the receipt of the applicable required regulatory approvals, and payment of each portion of the aggregate $3.5 billion purchase price will occur no later than 40 days after the date of each respective closing.

Note 6 – Fair Value Measurements

The carrying values of Cash and cash equivalents, Accounts receivable and Accounts payable and accrued liabilities approximate fair value due to the short-term maturities of these instruments. The carrying values of EIP receivables approximate fair value as the receivables are recorded at their present value using an imputed interest rate.

Derivative Financial Instruments

Periodically, we use derivatives to manage exposure to market risk, such as interest rate risk. We designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship to help minimize significant, unplanned fluctuations in cash flows or fair values caused by designated market risks, such as interest rate volatility. We do not use derivatives for trading or speculative purposes.

Cash flows associated with qualifying hedge derivative instruments are presented in the same category on our Condensed Consolidated Statements of Cash Flows as the item being hedged. For fair value hedges, the change in the fair value of the derivative instruments is recognized in earnings through the same income statement line item as the change in the fair value of the hedged item. For cash flow hedges, the change in the fair value of the derivative instruments is reported in Other comprehensive income and recognized in earnings when the hedged item is recognized in earnings, again, through the same income statement line item.

We did not have any significant derivative instruments outstanding as of March 31, 2024, and December 31, 2023.

Interest Rate Lock Derivatives

In April 2020, we terminated our interest rate lock derivatives entered into in October 2018.

Aggregate changes in the fair value of the interest rate lock derivatives, net of tax and amortization, of $1.1 billion are presented in Accumulated other comprehensive loss on our Condensed Consolidated Balance Sheets as of both March 31, 2024, and December 31, 2023.

For the three months ended March 31, 2024 and 2023, $57 million and $53 million, respectively, were amortized from Accumulated other comprehensive loss into Interest expense, net, on our Condensed Consolidated Statements of Comprehensive Income. We expect to amortize $241 million of the Accumulated other comprehensive loss associated with the derivatives into Interest expense, net, over the 12 months ending March 31, 2025.

Deferred Purchase Price Assets

In connection with the sales of certain service and EIP accounts receivable pursuant to the sale arrangements, we have deferred purchase price assets measured at fair value that are based on a discounted cash flow model using unobservable Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. See Note 4 – Sales of Certain Receivables for further information.

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The carrying amounts of our deferred purchase price assets, which are measured at fair value on a recurring basis and are included on our Condensed Consolidated Balance Sheets, were $586 million and $658 million as of March 31, 2024, and December 31, 2023, respectively.

Debt

The fair value of our Senior Notes and spectrum-backed Senior Secured Notes to third parties was determined based on quoted market prices in active markets, and therefore were classified as Level 1 within the fair value hierarchy. The fair value of our Senior Notes to affiliates was determined based on a discounted cash flow approach using market interest rates of instruments with similar terms and maturities and an estimate for our standalone credit risk. Accordingly, our Senior Notes to affiliates were classified as Level 2 within the fair value hierarchy. The fair value of our asset-backed notes (“ABS Notes”) was primarily based on quoted prices in inactive markets for identical instruments and observable changes in market interest rates, both of which are Level 2 inputs. Accordingly, our ABS Notes were classified as Level 2 within the fair value hierarchy.

Although we have determined the estimated fair values using available market information and commonly accepted valuation methodologies, judgment was required in interpreting market data to develop fair value estimates for the Senior Notes to affiliates and ABS Notes. The fair value estimates were based on information available as of March 31, 2024, and December 31, 2023. As such, our estimates are not necessarily indicative of the amount we could realize in a current market exchange.

The carrying amounts and fair values of our short-term and long-term debt included on our Condensed Consolidated Balance Sheets were as follows:

(in millions)	Level within the Fair Value Hierarchy	March 31, 2024				December 31, 2023
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
Liabilities:
Senior Notes to third parties	1	$	73,421	$	67,914	$	70,493	$	65,962
Senior Notes to affiliates	2	1,496		1,464		1,496		1,499
Senior Secured Notes to third parties	1	2,050		1,994		2,281		2,207
ABS Notes to third parties	2	1,246		1,244		748		748

Note 7 – Debt

The following table sets forth the debt balances and activity as of, and for the three months ended, March 31, 2024:

(in millions)	December 31, 2023		Proceeds from Issuances and Borrowings (1)		Repayments		Reclassifications (1)		Other (2)		March 31, 2024
Short-term debt	$	3,619	$	—	$	(223)	$	1,983	$	(23)	$	5,356
Long-term debt	69,903		3,473		—		(1,983)		(32)		71,361
Total debt to third parties	73,522		3,473		(223)		—		(55)		76,717
Long-term debt to affiliates	1,496		—		—		—		—		1,496
Total debt	$	75,018	$	3,473	$	(223)	$	—	$	(55)	$	78,213

(1)Issuances and borrowings and reclassifications are recorded net of accrued or paid issuance costs and discounts.

(2)Other includes the amortization of premiums, discounts, debt issuance costs and consent fees.

Our effective interest rate, excluding the impact of derivatives and capitalized interest, was approximately 4.1% and 4.0% on weighted-average debt outstanding of $77.4 billion and $73.4 billion for the three months ended March 31, 2024 and 2023, respectively. The weighted-average debt outstanding was calculated by applying an average of the monthly ending balances of total short-term and long-term debt to third parties and short-term and long-term debt to affiliates, net of unamortized premiums, discounts, debt issuance costs and consent fees.

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Issuances and Borrowings

During the three months ended March 31, 2024, we issued the following Senior Notes:

(in millions)	Principal Issuances		Discounts and Issuance Costs, Net		Net Proceeds from Issuance of Long-Term Debt		Issue Date
4.850% Senior Notes due 2029	$	1,000	$	(6)	$	994	January 12, 2024
5.150% Senior Notes due 2034	1,250		(11)		1,239		January 12, 2024
5.500% Senior Notes due 2055	750		(7)		743		January 12, 2024
Total of Senior Notes issued	$	3,000	$	(24)	$	2,976
5.050% Class A Senior ABS Notes due 2029	$	500	$	(3)	$	497	February 14, 2024
Total of ABS Notes issued	$	500	$	(3)	$	497

Note Repayments

During the three months ended March 31, 2024, we made the following repayments:

(in millions)	Principal Amount		Repayment Date
4.738% Secured Series 2018-1 A-1 Notes due 2025	$	131	Various
5.152% Series 2018-1 A-2 Notes due 2028	92		Various
Total Repayments	$	223

Asset-backed Notes

On February 14, 2024, we issued $500 million of 5.050% Class A Senior ABS Notes to third parties in a private placement transaction. These ABS Notes are secured by $667 million of gross EIP receivables and future collections on such receivables. Net proceeds of $497 million from these ABS Notes are presented in Proceeds from issuance of long-term debt on our Condensed Consolidated Statements of Cash Flows in the three months ended March 31, 2024.

As of March 31, 2024, $1.3 billion of our ABS Notes were secured in total by $1.7 billion of gross EIP receivables and future collections on such receivables. Our ABS Notes and the assets securing this debt are included on our Condensed Consolidated Balance Sheets.

The expected maturities of our ABS Notes as of March 31, 2024, were as follows:

(in millions)	Expected Maturities
2024	$	198
2025	552
2026	459
2027	41
Total	$	1,250

Variable Interest Entities

In connection with our ABS Notes issuances, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “ABS BRE”), and a trust (the “ABS Trust” and together with the ABS BRE, the “ABS Entities”), in which the ABS BRE holds a residual interest. Each of the ABS Entities meet the definition of a VIE for which we have determined that we are the primary beneficiary, as we have the power to direct the activities of the ABS Entities that most significantly impact their performance. Accordingly, we include the balances and results of operations of the ABS Entities in our condensed consolidated financial statements.

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The following table summarizes the carrying amounts and classification of assets and liabilities included in our Condensed Consolidated Balance Sheets with respect to the ABS Entities:

(in millions)	March 31, 2024		December 31, 2023
Assets
Equipment installment plan receivables, net	$	1,123	$	739
Equipment installment plan receivables due after one year, net	376		168
Other current assets	154		101
Liabilities
Accounts payable and accrued liabilities	$	2	$	1
Short-term debt	413		198
Long-term debt	833		550

See Note 3 – Receivables and Related Allowance for Credit Losses for additional information on the EIP receivables used to secure the ABS Notes.

Restricted Cash

Certain provisions of our debt agreements require us to maintain specified cash collateral balances. Amounts associated with these balances are considered to be restricted cash. See Note 13 - Additional Financial Information for our reconciliation of Cash and cash equivalents, including restricted cash.

Note 8 – Tower Obligations

Existing CCI Tower Lease Arrangements

In 2012, we conveyed to Crown Castle International Corp. (“CCI”) the exclusive right to manage and operate approximately 6,200 tower sites (“CCI Lease Sites”) via a master prepaid lease with site lease terms ranging from 23 to 37 years. CCI has fixed-price purchase options for the CCI Lease Sites totaling approximately $2.0 billion, exercisable annually on a per-tranche basis at the end of the lease term during the period from December 31, 2035, through December 31, 2049. If CCI exercises its purchase option for any tranche, it must purchase all the towers in the tranche. We lease back a portion of the space at certain tower sites.

Assets and liabilities associated with the operation of the tower sites were transferred to special purpose entities (“SPEs”). Assets included ground lease agreements or deeds for the land on which the towers are situated, the towers themselves and existing subleasing agreements with other mobile network operator tenants that lease space at the tower sites. Liabilities included the obligation to pay ground lease rentals, property taxes and other executory costs.

We determined the SPEs containing the CCI Lease Sites (“Lease Site SPEs”) are VIEs as they lack sufficient equity to finance their activities. We have a variable interest in the Lease Site SPEs but are not the primary beneficiary as we lack the power to direct the activities that most significantly impact the Lease Site SPEs’ economic performance. These activities include managing tenants and underlying ground leases, performing repair and maintenance on the towers, the obligation to absorb expected losses and the right to receive the expected future residual returns from the purchase option to acquire the CCI Lease Sites. As we determined that we are not the primary beneficiary and do not have a controlling financial interest in the Lease Site SPEs, the Lease Site SPEs are not included on our condensed consolidated financial statements.

However, we also considered if this arrangement resulted in the sale of the CCI Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the CCI Lease Sites tower assets remained on our Condensed Consolidated Balance Sheets. We recorded long-term financial obligations in the amount of the net proceeds received and recognize interest on the tower obligations. The tower obligations are increased by interest expense and amortized through contractual leaseback payments made by us to CCI and through net cash flows generated and retained by CCI from the operation of the tower sites.

Acquired CCI Tower Lease Arrangements

Prior to our merger with Sprint (the “Merger”), Sprint entered into a lease-out and leaseback arrangement with Global Signal Inc., a third party that was subsequently acquired by CCI, that conveyed to CCI the exclusive right to manage and operate approximately 6,400 tower sites (“Master Lease Sites”) via a master prepaid lease. These agreements were assumed upon the

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close of the Merger, at which point the remaining term of the lease-out was approximately 17 years with no renewal options. CCI has a fixed price purchase option for all (but not less than all) of the leased or subleased sites for approximately $2.3 billion, exercisable one year prior to the expiration of the agreement and ending 120 days prior to the expiration of the agreement. We lease back a portion of the space at certain tower sites.

We considered if this arrangement resulted in the sale of the Master Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the Master Lease Sites tower assets remained on our Condensed Consolidated Balance Sheets.

We recognize interest expense on the tower obligations. The tower obligations are increased by the interest expense and amortized through contractual leaseback payments made by us to CCI. The tower assets are reported in Property and equipment, net on our Condensed Consolidated Balance Sheets and are depreciated to their estimated residual values over the expected useful life of the towers, which is 20 years.

Leaseback Arrangement

On January 3, 2022, we entered into an agreement (the “Crown Agreement”) with CCI. The Crown Agreement extends the current term of the leasebacks by up to 12 years and modifies the leaseback payments for both the Existing CCI Tower Lease Arrangements and the Acquired CCI Tower Lease Arrangements. As a result of the Crown Agreement, there was an increase in our financing obligation as of the effective date of the Crown Agreement of approximately $1.2 billion, with a corresponding decrease to Other long-term liabilities associated with unfavorable contract terms. The modification resulted in a revised interest rate under the effective interest method for the tower obligations: 11.6% for the Existing CCI Tower Lease Arrangements and 5.3% for the Acquired CCI Tower Lease Arrangements. There were no changes made to either of our master prepaid leases with CCI.

The following table summarizes the balances associated with both of the tower arrangements on our Condensed Consolidated Balance Sheets:

(in millions)	March 31, 2024		December 31, 2023
Property and equipment, net	$	2,182	$	2,220
Tower obligations	3,751		3,777
Other long-term liabilities	554		554

Future minimum payments related to the tower obligations are approximately $421 million for the 12-month period ending March 31, 2025, $774 million in total for both of the 12-month periods ending March 31, 2026 and 2027, $816 million in total for both of the 12-month periods ending March 31, 2028 and 2029, and $4.0 billion in total thereafter.

We are contingently liable for future ground lease payments through the remaining term of the CCI Lease Sites and the Master Lease Sites. These contingent obligations are not included in Operating lease liabilities, as any amount due is contractually owed by CCI based on the subleasing arrangement. Under the arrangement, we remain primarily liable for ground lease payments on approximately 900 sites and have included lease liabilities of $241 million in our Operating lease liabilities as of March 31, 2024.

Note 9 – Revenue from Contracts with Customers

Disaggregation of Revenue

We provide wireless communications services to three primary categories of customers:

•Postpaid customers generally include customers who are qualified to pay after receiving wireless communications services utilizing phones, High Speed Internet, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT);

•Prepaid customers generally include customers who pay for wireless communications services in advance; and

•Wholesale customers include Machine-to-Machine and Mobile Virtual Network Operator customers that operate on our network but are managed by wholesale partners.

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Postpaid service revenues, including postpaid phone revenues and postpaid other revenues, were as follows:

	Three Months Ended March 31,
(in millions)	2024		2023
Postpaid service revenues
Postpaid phone revenues	$	11,145	$	10,652
Postpaid other revenues	1,486		1,210
Total postpaid service revenues	$	12,631	$	11,862

We operate as a single operating segment. The balances presented in each revenue line item on our Condensed Consolidated Statements of Comprehensive Income represent categories of revenue from contracts with customers disaggregated by type of product and service. Postpaid and prepaid service revenues also include revenues earned for providing premium services to customers, such as device insurance services. Revenue generated from the lease of mobile communication devices is included in Equipment revenues on our Condensed Consolidated Statements of Comprehensive Income.

Contract Balances

The contract asset and contract liability balances from contracts with customers as of March 31, 2024, and December 31, 2023, were as follows:

(in millions)	Contract Assets		Contract Liabilities
Balance as of December 31, 2023	$	607	$	812
Balance as of March 31, 2024	548		836
Change	$	(59)	$	24

Contract assets primarily represent revenue recognized for equipment sales with promotional bill credits offered to customers that are paid over time and are contingent on the customer maintaining a service contract.

The change in the contract asset balance includes customer activity related to new promotions, offset by billings on existing contracts and impairment, which is recognized as bad debt expense. The current portion of our contract assets of approximately $449 million and $495 million as of March 31, 2024, and December 31, 2023, respectively, was included in Other current assets on our Condensed Consolidated Balance Sheets.

Contract liabilities are recorded when fees are collected, or we have an unconditional right to consideration (a receivable) in advance of delivery of goods or services. Changes in contract liabilities are primarily related to the activity of prepaid customers. Contract liabilities are primarily included in Deferred revenue on our Condensed Consolidated Balance Sheets.

Revenues for the three months ended March 31, 2024 and 2023 include the following:

	Three Months Ended March 31,
(in millions)	2024		2023
Amounts included in the beginning of year contract liability balance	$	698	$	667

Remaining Performance Obligations

As of March 31, 2024, the aggregate amount of transaction price allocated to remaining service performance obligations for postpaid contracts with subsidized devices and promotional bill credits that result in an extended service contract is $1.3 billion. We expect to recognize revenue as the service is provided on these postpaid contracts over an extended contract term of 24 months from the time of origination.

Information about remaining performance obligations that are part of a contract that has an original expected duration of one year or less has been excluded from the above, which primarily consists of monthly service contracts.

Certain of our wholesale, roaming and service contracts include variable consideration based on usage and performance. This variable consideration has been excluded from the disclosure of remaining performance obligations. As of March 31, 2024, the aggregate amount of the contractual minimum consideration for wholesale, roaming and service contracts is $1.3 billion, $1.6 billion and $2.8 billion for the remainder of 2024, 2025, and 2026 and beyond, respectively. These contracts have a remaining duration ranging from less than one year to eight years.

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Contract Costs

The balance of deferred incremental costs to obtain contracts with customers was $2.1 billion as of both March 31, 2024, and December 31, 2023, and is included in Other assets on our Condensed Consolidated Balance Sheets. Deferred contract costs incurred to obtain postpaid service contracts are amortized over a period of 24 months. The amortization period is monitored to reflect any significant change in assumptions. Amortization of deferred contract costs included in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income were $489 million and $422 million for the three months ended March 31, 2024 and 2023, respectively.

The deferred contract cost asset is assessed for impairment on a periodic basis. There were no impairment losses recognized on deferred contract cost assets for the three months ended March 31, 2024 and 2023.

Note 10 – Stockholder Return Program

2023-2024 Stockholder Return Program

On September 6, 2023, our Board of Directors authorized our 2023-2024 Stockholder Return Program of up to $19.0 billion that will run from October 1, 2023, through December 31, 2024 (the “2023-2024 Stockholder Return Program”). The 2023-2024 Stockholder Return Program consists of repurchases of shares of our common stock and the payment of cash dividends.

On January 24, 2024, our Board of Directors declared a cash dividend of $0.65 per share on our issued and outstanding common stock, which was paid on March 14, 2024, to stockholders of record as of the close of business on March 1, 2024.

On March 15, 2024, our Board of Directors declared a cash dividend of $0.65 per share on our issued and outstanding common stock, which is payable on June 13, 2024, to stockholders of record as of the close of business on May 31, 2024.

During the three months ended March 31, 2024, we paid an aggregate of $769 million in cash dividends to our stockholders, which was presented within Net cash used in financing activities on our Condensed Consolidated Statements of Cash Flows, of which $388 million was paid to DT. As of March 31, 2024, $756 million for dividends payable is presented within Other current liabilities on our Condensed Consolidated Balance Sheets, of which $386 million is payable to DT.

During the three months ended March 31, 2024, we repurchased 21,933,790 shares of our common stock at an average price per share of $162.69 for a total purchase price of $3.6 billion under the 2023-2024 Stockholder Return Program. All shares repurchased during the three months ended March 31, 2024, were purchased at market price. As of March 31, 2024, we had up to $11.7 billion remaining under the 2023-2024 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2024. The next quarterly cash dividend will be paid on June 13, 2024.

Subsequent to March 31, 2024, from April 1, 2024, through April 19, 2024, we repurchased 5,427,946 shares of our common stock at an average price per share of $160.97 for a total purchase price of $874 million. As of April 19, 2024, we had up to $10.8 billion remaining under the 2023-2024 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2024.

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Note 11 – Earnings Per Share

The computation of basic and diluted earnings per share was as follows:

	Three Months Ended March 31,
(in millions, except shares and per share amounts)	2024		2023
Net income	$	2,374	$	1,940
Weighted-average shares outstanding – basic	1,185,298,497		1,219,608,362
Effect of dilutive securities:
Outstanding stock options, unvested stock awards	3,793,522		4,996,336
Weighted-average shares outstanding – diluted	1,189,092,019		1,224,604,698
Earnings per share – basic	$	2.00	$	1.59
Earnings per share – diluted	$	2.00	$	1.58
Potentially dilutive securities:
Outstanding stock options and unvested stock awards	6		98,175
SoftBank contingent consideration (1)	—		48,751,557

(1)     Represents the weighted-average number of shares (“SoftBank Specified Shares”) that were contingently issuable from the Merger date of April 1, 2020, pursuant to a letter agreement dated February 20, 2020, between T-Mobile, SoftBank and DT (the “Letter Agreement”). The SoftBank Specified Shares were determined to be contingent consideration for the Merger and was not dilutive until the defined volume-weighted average price per share was reached (the “Threshold Price”). As of the close of trading on December 22, 2023, the Threshold Price was reached. On December 28, 2023, the Company issued the SoftBank Specified Shares to SoftBank in accordance with the Letter Agreement.

As of March 31, 2024, we had authorized 100 million shares of preferred stock, with a par value of $0.00001 per share. There was no preferred stock outstanding as of March 31, 2024 and 2023. Potentially dilutive securities were not included in the computation of diluted earnings per share if to do so would have been anti-dilutive.

Note 12 – Commitments and Contingencies

Merger Commitments

In connection with the regulatory proceedings and approvals of the Merger pursuant to the Business Combination Agreement with Sprint and the other parties named therein (as amended, the “Business Combination Agreement”) and the other transactions contemplated by the Business Combination Agreement (collectively, the “Transactions”), we have commitments and other obligations to various state and federal agencies and certain nongovernmental organizations, including pursuant to the Consent Decree agreed to by us, DT, Sprint, SoftBank and DISH and entered by the U.S. District Court for the District of Columbia, and the FCC’s memorandum opinion and order approving our applications for approval of the Merger. These commitments and obligations include, among other things, extensive 5G network build-out commitments, obligations to deliver high-speed wireless services to the vast majority of Americans, including Americans residing in rural areas, and the marketing of an in-home broadband product where spectrum capacity is available. Other commitments relate to national security, pricing, service, employment and support of diversity initiatives. Many of the commitments specify time frames for compliance and reporting. Failure to fulfill our obligations and commitments in a timely manner could result in substantial fines, penalties, or other legal and administrative actions.

Contingencies and Litigation

Litigation and Regulatory Matters

We are involved in various lawsuits and disputes, claims, government agency investigations and enforcement actions, and other proceedings (“Litigation and Regulatory Matters”) that arise in the ordinary course of business, which include claims of patent infringement (most of which are asserted by non-practicing entities primarily seeking monetary damages), class actions, and proceedings to enforce FCC or other government agency rules and regulations. Those Litigation and Regulatory Matters are at various stages, and some of them may proceed to trial, arbitration, hearing, or other adjudication that could result in fines, penalties, or awards of monetary or injunctive relief in the coming 12 months if they are not otherwise resolved. We have established an accrual with respect to certain of these matters, where appropriate. The accruals are reflected on our condensed consolidated financial statements, but they are not considered to be, individually or in the aggregate, material. An accrual is established when we believe it is both probable that a loss has been incurred and an amount can be reasonably estimated. For

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other matters, where we have not determined that a loss is probable or because the amount of loss cannot be reasonably estimated, we have not recorded an accrual due to various factors typical in contested proceedings, including, but not limited to, uncertainty concerning legal theories and their resolution by courts or regulators, uncertain damage theories and demands, and a less than fully developed factual record. For Litigation and Regulatory Matters that may result in a contingent gain, we recognize such gains on our condensed consolidated financial statements when the gain is realized or realizable. We recognize legal costs expected to be incurred in connection with Litigation and Regulatory Matters as they are incurred. Except as otherwise specified below, we do not expect that the ultimate resolution of these Litigation and Regulatory Matters, individually or in the aggregate, will have a material adverse effect on our financial position, but we note that an unfavorable outcome of some or all of the specific matters identified below or other matters that we are or may become involved in could have a material adverse impact on results of operations or cash flows for a particular period. This assessment is based on our current understanding of relevant facts and circumstances. As such, our view of these matters is subject to inherent uncertainties and may change in the future.

On February 28, 2020, we received a Notice of Apparent Liability for Forfeiture and Admonishment from the FCC, which proposed a penalty against us for allegedly violating section 222 of the Communications Act and the FCC’s regulations governing the privacy of customer information. We have included an accrual for the settlement amount that we believe to be probable in Accounts payable and accrued liabilities on our Condensed Consolidated Balance Sheets as of March 31, 2024.

On April 1, 2020, in connection with the closing of the Merger, we assumed the contingencies and litigation matters of Sprint. Those matters include a wide variety of disputes, claims, government agency investigations and enforcement actions, and other proceedings. These matters include, among other things, certain ongoing FCC and state government agency investigations into Sprint’s Lifeline program. In September 2019, Sprint notified the FCC that it had claimed monthly subsidies for serving subscribers, even though these subscribers may not have met usage requirements under Sprint's usage policy for the Lifeline program, due to an inadvertent coding issue in the system used to identify qualifying subscriber usage that occurred in July 2017 while the system was being updated. Sprint has made a number of payments to reimburse the federal government and certain states for excess subsidy payments.

We note that, pursuant to Amendment No. 2, dated as of February 20, 2020, to the Business Combination Agreement, dated as of April 29, 2018, by and among the Company, Sprint and the other parties named therein, SoftBank agreed to indemnify us against certain specified matters and losses, including those relating to the Lifeline matters described above. Resolution of these matters could require us to make additional reimbursements and pay additional fines and penalties, which we do not expect to have a significant impact on our financial results. We expect that any additional liabilities related to these indemnified matters would be indemnified and reimbursed by SoftBank.

On June 1, 2021, a putative shareholder class action and derivative lawsuit was filed in the Delaware Court of Chancery, Dinkevich v. Deutsche Telekom AG, et al., Case No. C.A. No. 2021-0479, against DT, SoftBank and certain of our current and former officers and directors, asserting breach of fiduciary duty claims relating to the repricing amendment to the Business Combination Agreement and to SoftBank’s monetization of its T-Mobile shares. We are also named as a nominal defendant in the case. We are unable to predict the potential outcome of these claims.

On August 12, 2021, we became aware of a cybersecurity issue involving unauthorized access to T-Mobile’s systems (the “August 2021 cyberattack”). We immediately began an investigation and engaged cybersecurity experts to assist with the assessment of the incident and to help determine what data was impacted. Our investigation uncovered that the perpetrator had illegally gained access to certain areas of our systems on or about March 18, 2021, but only gained access to and took data of current, former, and prospective customers beginning on or about August 3, 2021. With the assistance of our outside cybersecurity experts, we located and closed the unauthorized access to our systems and identified current, former and prospective customers whose information was impacted and notified them, consistent with state and federal requirements. We also undertook a number of other measures to demonstrate our continued support and commitment to data privacy and protection. We also coordinated with law enforcement. Our forensic investigation is complete, and we believe we have a full view of the data compromised.

As a result of the August 2021 cyberattack, we have become subject to numerous lawsuits, including mass arbitration claims and multiple class action lawsuits that have been filed in numerous jurisdictions seeking, among other things, unspecified monetary damages, costs and attorneys’ fees arising out of the August 2021 cyberattack. In December 2021, the Judicial Panel on Multidistrict Litigation consolidated the federal class action lawsuits in the U.S. District Court for the Western District of Missouri under the caption In re: T-Mobile Customer Data Security Breach Litigation, Case No. 21-md-3019-BCW. On July 22, 2022, we entered into an agreement to settle the lawsuit. On June 29, 2023, the Court issued an order granting final approval of the settlement, which is subject to potential appeals. Under the terms of the settlement, we would pay an aggregate of $350 million to fund claims submitted by class members, the legal fees of plaintiffs’ counsel and the costs of administering the settlement. We also committed to an aggregate incremental spend of $150 million for data security and related technology in

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2022 and 2023. We previously paid $35 million for claims administration purposes. On July 31, 2023, a class member filed an appeal to the final approval order challenging the Court’s award of attorneys’ fees to class counsel. We expect the remaining portion of the $350 million settlement payment to fund claims to be made once that appeal is resolved. We anticipate that, upon exhaustion of any appeals, the settlement will provide a full release of all claims arising out of the August 2021 cyberattack by class members who do not opt out, against all defendants, including us, our subsidiaries and affiliates, and our directors and officers. The settlement contains no admission of liability, wrongdoing or responsibility by any of the defendants. We have the right to terminate the settlement agreement under certain conditions.

We anticipate that this settlement of the class action, along with other settlements of separate consumer claims that have been previously completed or are currently pending, will resolve substantially all of the claims brought to date by our current, former and prospective customers who were impacted by the 2021 cyberattack. In connection with the proposed class action settlement and the separate settlements, we recorded a total pre-tax charge of approximately $400 million in the second quarter of 2022. During the three months ended March 31, 2023, we recognized $50 million in reimbursements from insurance carriers for costs incurred related to the August 2021 cyberattack, which is included as a reduction to Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income. The ultimate resolution of the class action depends on the number of plaintiffs who opt out of the proposed settlement and whether the proposed settlement will be appealed.

In addition, in September 2022, a purported Company shareholder filed a derivative action in the Delaware Chancery Court under the caption Harper v. Sievert et al., Case No. 2022-0819-SG, against our current directors and certain of our former directors, alleging claims for breach of fiduciary duty relating to the Company’s cybersecurity practices. We are also named as a nominal defendant in the lawsuit. We are unable at this time to predict the potential outcome of this lawsuit or whether we may be subject to further private litigation.

We have also received inquiries from various government agencies, law enforcement and other governmental authorities related to the August 2021 cyberattack, which could result in substantial fines or penalties. We are cooperating fully with these agencies and regulators and working with them to resolve these matters. While we hope to resolve them in the near term, we cannot predict the timing or outcome of any of these matters or whether we may be subject to further regulatory inquiries, investigations, or enforcement actions.

In light of the inherent uncertainties involved in such matters and based on the information currently available to us, in addition to the previously recorded pre-tax charge of approximately $400 million noted above, we believe it is reasonably possible that we could incur additional losses associated with these proceedings and inquiries, and we will continue to evaluate information as it becomes known and will record an estimate for losses at the time or times when it is both probable that a loss has been incurred and the amount of the loss is reasonably estimable. Ongoing legal and other costs related to these proceedings and inquiries, as well as any potential future actions, may be substantial, and losses associated with any adverse judgments, settlements, penalties or other resolutions of such proceedings and inquiries could be material to our business, reputation, financial condition, cash flows and operating results.

On June 17, 2022, plaintiffs filed a putative antitrust class action complaint in the Northern District of Illinois, Dale et al. v. Deutsche Telekom AG, et al., Case No. 1:22-cv-03189, against DT, T-Mobile, and SoftBank, alleging that the Merger violated the antitrust laws and harmed competition in the U.S. retail cell service market. Plaintiffs seek injunctive relief and trebled monetary damages on behalf of a purported class of AT&T and Verizon customers who plaintiffs allege paid artificially inflated prices due to the Merger. We are vigorously defending this lawsuit, but we are unable to predict the potential outcome.

On January 5, 2023, we identified that a bad actor was obtaining data through a single Application Programming Interface (“API”) without authorization. Based on our investigation, the impacted API is only able to provide a limited set of customer account data, including name, billing address, email, phone number, date of birth, T-Mobile account number and information such as the number of lines on the account and plan features. The result from our investigation indicates that the bad actor(s) obtained data from this API for approximately 37 million current postpaid and prepaid customer accounts, though many of these accounts did not include the full data set. We believe that the bad actor first retrieved data through the impacted API starting on or around November 25, 2022. We have notified individuals whose information was impacted consistent with state and federal requirements.

In connection with the January 2023 cyberattack, we became subject to consumer class actions and regulatory inquiries, to which we will continue to respond in due course and may incur significant expenses. However, we cannot predict the timing or outcome of any of these potential matters or whether we may be subject to additional legal proceedings, claims, regulatory inquiries, investigations, or enforcement actions. In addition, we are unable to predict the full impact of this incident on customer behavior in the future, including whether a change in our customers’ behavior could negatively impact our results of operations on an ongoing basis, although we presently do not expect that it will have a material effect on our operations.

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Note 13 – Additional Financial Information

Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities are summarized as follows:

(in millions)	March 31, 2024		December 31, 2023
Accounts payable	$	3,345	$	5,573
Payroll and related benefits	682		1,142
Property and other taxes, including payroll	1,694		1,704
Accrued interest	887		818
Other accrued liabilities	1,112		1,136
Accounts payable and accrued liabilities	$	7,720	$	10,373

Book overdrafts included in accounts payable were $702 million and $740 million as of March 31, 2024, and December 31, 2023, respectively.

Supplemental Condensed Consolidated Statements of Cash Flows Information

The following table summarizes T-Mobile’s supplemental cash flow information:

	Three Months Ended March 31,
(in millions)	2024		2023
Interest payments, net of amounts capitalized	$	896	$	840
Operating lease payments	1,344		1,314
Income tax payments	7		27
Non-cash investing and financing activities
Non-cash beneficial interest obtained in exchange for securitized receivables	$	661	$	1,119
Change in accounts payable and accrued liabilities for purchases of property and equipment	(894)		(329)
Operating lease right-of-use assets obtained in exchange for lease obligations	487		439
Financing lease right-of-use assets obtained in exchange for lease obligations	263		239

Cash and cash equivalents, including restricted cash

Cash and cash equivalents, including restricted cash, presented on our Condensed Consolidated Statements of Cash Flows were included on our Condensed Consolidated Balance Sheets as follows:

(in millions)	March 31, 2024		December 31, 2023
Cash and cash equivalents	$	6,708	$	5,135
Restricted cash (included in Other current assets)	154		101
Restricted cash (included in Other assets)	76		71
Cash and cash equivalents, including restricted cash	$	6,938	$	5,307

Note 14 – Subsequent Events

Subsequent to March 31, 2024, from April 1, 2024, through April 19, 2024, we repurchased 5,427,946 shares of our common stock at an average price per share of $160.97 for a total purchase price of $874 million. See Note 10 - Stockholder Return Program for additional information regarding the 2023-2024 Stockholder Return Program.

Subsequent to March 31, 2024, on April 24, 2024, we entered into a Merger Agreement with a fund operated by EQT Infrastructure VI fund (“Fund VI”) for the joint acquisition by us and Fund VI of Lumos, a fiber-to-the-home platform (“Lumos”), from EQT’s predecessor fund EQT Infrastructure III. The Lumos acquisition is expected to close in late 2024 or early 2025, subject to customary closing conditions and regulatory approvals. At closing, we expect to invest approximately $950 million in the joint venture to acquire a 50% equity interest and all existing fiber customers. The funds invested by us will be used to fund future fiber builds. In addition, we are expected to contribute an additional commitment of approximately $500 million between 2027 and 2028.

Subsequent to March 31, 2024, on April 25, 2024, we received all necessary regulatory approvals for the Ka’ena Acquisition, which is expected to close on May 1, 2024. See Note 2 - Business Combination for more information.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Cautionary Statement Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q (“Form 10-Q”) of T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”) includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical fact, including information concerning our future results of operations, are forward-looking statements. These forward-looking statements are generally identified by the words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “could” or similar expressions. Forward-looking statements are based on current expectations and assumptions, which are subject to risks and uncertainties that may cause actual results to differ materially from the forward-looking statements. The following important factors, along with the Risk Factors included in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2023, and Part II, Item 1A of this Form 10-Q, could affect future results and cause those results to differ materially from those expressed in the forward-looking statements:

•competition, industry consolidation and changes in the market for wireless communications services and other forms of connectivity;

•criminal cyberattacks, disruption, data loss or other security breaches;

•our inability to take advantage of technological developments on a timely basis;

•our inability to retain or motivate key personnel, hire qualified personnel or maintain our corporate culture;

•system failures and business disruptions, allowing for unauthorized use of or interference with our network and other systems;

•the scarcity and cost of additional wireless spectrum, and regulations relating to spectrum use;

•challenges in modernizing our existing applications and systems;

•the impacts of the actions we have taken and conditions we have agreed to in connection with the regulatory proceedings and approvals of our merger (the “Merger”) with Sprint Corporation (“Sprint”) pursuant to a Business Combination Agreement with Sprint and the other parties named therein (as amended, the “Business Combination Agreement”) and the other transactions contemplated by the Business Combination Agreement (collectively, the “Transactions”), including the acquisition by DISH Network Corporation (“DISH”) of the prepaid wireless business operated under the Boost Mobile and Sprint prepaid brands (excluding the Assurance brand Lifeline customers and the prepaid wireless customers of Shenandoah Personal Communications Company LLC (“Shentel”) and Swiftel Communications, Inc.), including customer accounts, inventory, contracts, intellectual property and certain other specified assets, and the assumption of certain related liabilities (collectively, the “Prepaid Transaction”), the complaint and proposed final judgment (the “Final Judgment”) agreed to by us, Deutsche Telekom AG (“DT”), Sprint, SoftBank Group Corp. (“SoftBank”) and DISH with the U.S. District Court for the District of Columbia, which was approved by the Court on April 1, 2020, as amended on October 23, 2023, the proposed commitments filed with the Secretary of the Federal Communications Commission (“FCC”), which we announced on May 20, 2019, certain national security commitments and undertakings, and any other commitments or undertakings entered into, including, but not limited to, those we have made to certain states and nongovernmental organizations (collectively, the “Government Commitments”), and the challenges in satisfying the Government Commitments in the required time frames and the significant cumulative costs incurred in tracking and monitoring compliance over multiple years;

•adverse economic, political or market conditions in the U.S. and international markets, including changes resulting from increases in inflation or interest rates, supply chain disruptions and impacts of geopolitical instability, such as the Ukraine-Russia and Israel-Hamas wars and further escalations thereof;

•sociopolitical volatility and polarization;

•our inability to manage the ongoing arrangements entered into in connection with the Prepaid Transaction, and known or unknown liabilities arising in connection therewith;

•the timing and effects of any future acquisition, divestiture, investment, or merger involving us;

•any disruption or failure of our third parties (including key suppliers) to provide products or services for the operation of our business;

•our substantial level of indebtedness and our inability to service our debt obligations in accordance with their terms;

•changes in the credit market conditions, credit rating downgrades or an inability to access debt markets;

•the risk of future material weaknesses we may identify or any other failure by us to maintain effective internal controls, and the resulting significant costs and reputational damage;

•any changes in regulations or in the regulatory framework under which we operate;

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•laws and regulations relating to the handling of privacy and data protection;

•unfavorable outcomes of and increased costs from existing or future regulatory or legal proceedings;

•difficulties in protecting our intellectual property rights or if we infringe on the intellectual property rights of others;

•our offering of regulated financial services products and exposure to a wide variety of state and federal regulations;

•new or amended tax laws or regulations or administrative interpretations and judicial decisions affecting the scope or application of tax laws or regulations;

•our wireless licenses, including those controlled through leasing agreements, are subject to renewal and may be revoked;

•our exclusive forum provision as provided in our Fifth Amended and Restated Certificate of Incorporation (the “Certificate of Incorporation”);

•interests of DT, our controlling stockholder, which may differ from the interests of other stockholders;

•the dollar amount authorized for our 2023-2024 Stockholder Return Program (as defined in Note 10 - Stockholder Return Program of the Notes to the Condensed Consolidated Financial Statements) may not be fully utilized, and our share repurchases and dividend payments pursuant thereto may fail to have the desired impact on stockholder value; and

•future sales of our common stock by DT and SoftBank and our inability to attract additional equity financing outside the United States due to foreign ownership limitations by the FCC.

Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements. We undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements, except as required by law.

Investors and others should note that we announce material information to our investors using our investor relations website (https://investor.t-mobile.com), newsroom website (https://t-mobile.com/news), press releases, SEC filings and public conference calls and webcasts. We intend to also use certain social media accounts as means of disclosing information about us and our services and for complying with our disclosure obligations under Regulation FD (the @TMobileIR X account (https://twitter.com/TMobileIR), the @MikeSievert X account (https://twitter.com/MikeSievert), which Mr. Sievert also uses as a means for personal communications and observations, and the @TMobileCFO X account (https://twitter.com/tmobilecfo) and our Chief Financial Officer’s LinkedIn account (https://www.linkedin.com/in/peter-osvaldik-3887394), both of which Mr. Osvaldik also uses as a means for personal communication and observations). The information we post through these social media channels may be deemed material. Accordingly, investors should monitor these social media channels in addition to following our press releases, SEC filings and public conference calls and webcasts. The social media channels that we intend to use as a means of disclosing the information described above may be updated from time to time as listed on our investor relations website.

Overview

The objectives of our Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) are to provide users of our condensed consolidated financial statements with the following:

•A narrative explanation from the perspective of management of our financial condition, results of operations, cash flows, liquidity and certain other factors that may affect future results;

•Context to the condensed consolidated financial statements; and

•Information that allows assessment of the likelihood that past performance is indicative of future performance.

Our MD&A is provided as a supplement to, and should be read together with, our unaudited condensed consolidated financial statements as of and for the three months ended March 31, 2024, included in Part I, Item 1 of this Form 10-Q, and audited consolidated financial statements, included in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2023. Except as expressly stated, the financial condition and results of operations discussed throughout our MD&A are those of T-Mobile US, Inc. and its consolidated subsidiaries.

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Merger-Related Costs

Merger-related costs associated with the Merger and acquisitions of affiliates generally include:

•Integration costs to achieve efficiencies in network, retail, information technology and back office operations, migrate customers to the T-Mobile network and billing systems and the impact of legal matters assumed as part of the Merger;

•Restructuring costs, including severance, store rationalization and network decommissioning; and

•Transaction costs, including legal and professional services related to the completion of the transactions.

Merger-related costs have been excluded from our calculations of Adjusted EBITDA and Core Adjusted EBITDA, which are non-GAAP financial measures, as we do not consider these costs to be reflective of our ongoing operating performance. See “Adjusted EBITDA and Core Adjusted EBITDA” in the “Performance Measures” section of this MD&A. Net cash payments for Merger-related costs, including payments related to our restructuring plan, are included in Net cash provided by operating activities on our Condensed Consolidated Statements of Cash Flows.

Merger-related costs are presented below:

(in millions)	Three Months Ended March 31,				Change
	2024		2023		$		%
Merger-related costs
Cost of services, exclusive of depreciation and amortization	$	107	$	208	$	(101)	(49)	%
Cost of equipment sales, exclusive of depreciation and amortization	—		(9)		9		(100)	%
Selling, general and administrative	23		159		(136)		(86)	%
Total Merger-related costs	$	130	$	358	$	(228)	(64)	%
Net cash payments for Merger-related costs	$	293	$	484	$	(191)	(39)	%

We expect to incur all of the remaining restructuring and integration costs associated with the Merger by the first half of 2024, with the cash expenditure for the Merger-related costs extending beyond 2024. Cash payments extending beyond 2024 primarily relate to operating and financing leases for which we have recognized accelerated lease expense.

In the second quarter of 2024, we will recognize a gain for the $100 million extension fee previously paid by DISH associated with the DISH License Purchase Agreement as a reduction to Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income. The gain will be presented as a reduction in Merger-related costs and excluded from our calculations of Adjusted EBITDA and Core Adjusted EBITDA. See Note 5 – Spectrum License Transactions of the Notes to the Condensed Consolidated Financial Statements for more information.

Acquisition of Ka’ena Corporation

On March 9, 2023, we entered into a Merger and Unit Purchase Agreement (the “Merger and Unit Purchase Agreement”) for the acquisition of 100% of the outstanding equity of Ka’ena Corporation and its subsidiaries, including, among others, Mint Mobile LLC (collectively, “Ka’ena”), for a maximum purchase price of $1.35 billion to be paid out 39% in cash and 61% in shares of T-Mobile common stock (the “Ka’ena Acquisition”). On March 13, 2024, we entered into Amendment No. 1 to the Merger and Unit Purchase Agreement, which amended, among other things, certain mechanics of the payment of the purchase consideration for the Ka’ena Acquisition, which will result in a nominal increase in the percentage of cash compared to shares of T-Mobile common stock to be paid out as part of the total purchase price.

The purchase price is variable, dependent upon specified performance indicators of Ka’ena during certain periods before and after closing, and consists of an upfront payment at closing of the transaction, subject to certain agreed-upon working capital and other adjustments, and a variable earnout payable 24 months after closing of the transaction. Our estimate of the upfront payment is subject to Ka’ena’s underlying business performance and the timing of transaction close, and is currently estimated to be $1.2 billion, before working capital and other adjustments, which we currently estimate will result in a net upfront payment of approximately $950 million, with approximately 45% to be paid in cash. Subsequent to March 31, 2024, on April 25, 2024, we received all necessary regulatory approvals and the Ka’ena Acquisition is expected to close on May 1, 2024.

Ka’ena is currently one of our wholesale partners, offering wireless telecommunications services to customers leveraging our network. Upon closing of the Ka’ena Acquisition, we expect to recognize customers of Ka’ena as prepaid customers, and we expect to see an increase in Prepaid revenues, partially offset by a decrease in Wholesale and other service revenues.

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Results of Operations

Set forth below is a summary of our consolidated financial results:

	Three Months Ended March 31,				Change
(in millions)	2024		2023		$		%
Revenues
Postpaid revenues	$	12,631	$	11,862	$	769	6	%
Prepaid revenues	2,403		2,417		(14)		(1)	%
Wholesale and other service revenues	1,062		1,267		(205)		(16)	%
Total service revenues	16,096		15,546		550		4	%
Equipment revenues	3,251		3,719		(468)		(13)	%
Other revenues	247		367		(120)		(33)	%
Total revenues	19,594		19,632		(38)		—	%
Operating expenses
Cost of services, exclusive of depreciation and amortization shown separately below	2,688		3,061		(373)		(12)	%
Cost of equipment sales, exclusive of depreciation and amortization shown separately below	4,399		4,588		(189)		(4)	%
Selling, general and administrative	5,138		5,425		(287)		(5)	%
Gain on disposal group held for sale	—		(42)		42		(100)	%
Depreciation and amortization	3,371		3,203		168		5	%
Total operating expenses	15,596		16,235		(639)		(4)	%
Operating income	3,998		3,397		601		18	%
Other expense, net
Interest expense, net	(880)		(835)		(45)		5	%
Other income, net	20		9		11		122	%
Total other expense, net	(860)		(826)		(34)		4	%
Income before income taxes	3,138		2,571		567		22	%
Income tax expense	(764)		(631)		(133)		21	%
Net income	$	2,374	$	1,940	$	434	22	%
Statement of Cash Flows Data
Net cash provided by operating activities	$	5,084	$	4,051	$	1,033	25	%
Net cash used in investing activities	(1,787)		(1,728)		(59)		3	%
Net cash used in financing activities	(1,666)		(2,273)		607		(27)	%
Non-GAAP Financial Measures
Adjusted EBITDA	$	7,652	$	7,199	$	453	6	%
Core Adjusted EBITDA	7,617		7,052		565		8	%
Adjusted Free Cash Flow	3,347		2,401		946		39	%

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The following discussion and analysis is for the three months ended March 31, 2024, compared to the same period in 2023, unless otherwise stated.

Total revenues was relatively flat. The offsetting changes impacting Total revenues are discussed below.

Postpaid revenues increased $769 million, or 6%, primarily from:

•Higher average postpaid accounts; and

•Higher postpaid ARPA. See “Postpaid ARPA” in the “Performance Measures” section of this MD&A.

Prepaid revenues decreased slightly, primarily from:

•Lower prepaid ARPU. See “Prepaid ARPU” in the “Performance Measures” section of this MD&A; mostly offset by

•Higher average prepaid customers.

Wholesale and other service revenues decreased $205 million, or 16%, primarily from:

•Lower Wireline revenues due to the sale of the Wireline Business on May 1, 2023;

•Lower Affordable Connectivity Program and Lifeline revenues; and

•Lower MVNO revenues, primarily due to DISH servicing more of its Boost customers with their standalone network and the migration of legacy TracFone customers off of the T-Mobile network, partially offset by growth in other MVNO partners.

Equipment revenues decreased $468 million, or 13%, primarily from:

•A decrease of $503 million in device sales revenue, excluding purchased leased devices, primarily from:

•A decrease in the number of postpaid and prepaid devices sold, including lower upgrades; partially offset by

•Slightly higher average revenue per device sold, primarily driven by a shift in the high-end phone mix, mostly offset by an increase in promotions per postpaid device; and

•A decrease of $112 million in lease revenues, primarily due to a lower number of customer devices under lease as a result of the continued strategic shift in device financing from leasing to EIP; partially offset by

•An increase of $227 million in liquidation revenue, primarily due to a higher number of in-house liquidated devices, including the impact from the transition of certain device recovery programs from external sources to in-house processing.

Other revenues decreased $120 million, or 33%, primarily from the transition of certain device recovery programs from external sources to in-house processing, resulting in a change in presentation from Other revenues to Equipment revenues.

Total operating expenses decreased $639 million, or 4%. The components of this change are discussed below.

Cost of services, exclusive of depreciation and amortization, decreased $373 million, or 12%, primarily from:

•Lower costs due to the sale of the Wireline Business on May 1, 2023;

•Lower employee costs, primarily due to reduced headcount; and

•A decrease of $101 million in Merger-related costs related to network decommissioning and integration, as well as higher Merger synergies.

Cost of equipment sales, exclusive of depreciation and amortization, decreased $189 million, or 4%, primarily from:

•A decrease of $291 million in device cost of equipment sales, excluding purchased leased devices, primarily from:

•A decrease in the number of postpaid and prepaid devices sold, including lower upgrades; partially offset by

•Higher average cost per device sold, primarily driven by a shift in the high-end phone mix; partially offset by

•An increase of $156 million in liquidation costs, primarily due to a higher number of in-house liquidated devices, including the impact from the transition of certain device recovery programs from external sources to in-house processing.

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Selling, general and administrative expenses decreased $287 million, or 5%, primarily from:

•A decrease of $136 million in Merger-related costs, as well as higher Merger synergies;

•Lower employee costs, primarily due to reduced headcount; and

•Lower severance and restructuring expenses; partially offset by

•Higher legal expenses.

Gain on disposal group held for sale was $42 million for the three months ended March 31, 2023, related to the sale of the Wireline Business on May 1, 2023. There was no gain or loss on disposal group held for sale for the three months ended March 31, 2024.

Depreciation and amortization increased $168 million, or 5%, primarily from higher depreciation expense from the acceleration of certain technology assets as we continue to modernize our network, technology systems and platforms.

Operating income, the components of which are discussed above, increased $601 million, or 18%.

Interest expense, net increased $45 million, or 5%, primarily from:

•Higher interest expense, primarily due to higher average debt outstanding and a slightly higher average effective interest rate; partially offset by

•Higher interest income, primarily due to higher average balances and higher average interest rates on short-term cash equivalents.

Other income, net was insignificant for both periods.

Income before income taxes, the components of which are discussed above, was $3.1 billion and $2.6 billion for the three months ended March 31, 2024 and 2023, respectively.

Income tax expense increased $133 million, or 21%, primarily from higher income before income taxes.

Our effective tax rate was 24.4% and 24.5% for the three months ended March 31, 2024 and 2023, respectively.

Net income, the components of which are discussed above, was $2.4 billion and $1.9 billion for the three months ended March 31, 2024 and 2023, respectively.

Net income included Merger-related costs, net of tax, of $97 million for the three months ended March 31, 2024, compared to $268 million for the three months ended March 31, 2023.

Guarantor Financial Information

Pursuant to the applicable indentures and supplemental indentures, the Senior Notes to affiliates and third parties issued by T-Mobile USA, Inc., Sprint and Sprint Capital Corporation (collectively, the “Issuers”) are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by T-Mobile (“Parent”) and certain of Parent’s 100% owned subsidiaries (“Guarantor Subsidiaries”).

The guarantees of the Guarantor Subsidiaries are subject to release in limited circumstances only upon the occurrence of certain customary conditions. Generally, the guarantees of the Guarantor Subsidiaries with respect to the Senior Notes issued by T-Mobile USA, Inc. (other than $3.5 billion in principal amount of Senior Notes issued in 2017 and 2018) and the credit agreement entered into by T-Mobile USA, Inc. will be automatically and unconditionally released if, immediately following such release and any concurrent releases of other guarantees, the aggregate principal amount of indebtedness of non-guarantor subsidiaries (other than certain specified subsidiaries) would not exceed $2.0 billion. The indentures, supplemental indentures and credit agreements governing the long-term debt contain covenants that, among other things, limit the ability of the Issuers or borrowers and the Guarantor Subsidiaries to incur more debt, create liens or other encumbrances, and to merge, consolidate or sell, or otherwise dispose of, substantially all of their assets.

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Basis of Presentation

The following tables include summarized financial information of the obligor groups of debt issued by T-Mobile USA, Inc., Sprint and Sprint Capital Corporation. The summarized financial information of each obligor group is presented on a combined basis with balances and transactions within the obligor group eliminated. Investments in and the equity in earnings of non-guarantor subsidiaries, which would otherwise be consolidated in accordance with GAAP, are excluded from the below summarized financial information pursuant to SEC Regulation S-X Rule 13-01.

The summarized balance sheet information for the consolidated obligor group of debt issued by T-Mobile USA, Inc. is presented in the table below:

(in millions)	March 31, 2024		December 31, 2023
Current assets	$	17,865	$	17,601
Noncurrent assets	176,591		178,252
Current liabilities	18,414		19,040
Noncurrent liabilities	130,471		128,197
Due to non-guarantors	11,647		10,916
Due to related parties	1,563		1,576

The summarized results of operations information for the consolidated obligor group of debt issued by T-Mobile USA, Inc. is presented in the table below:

(in millions)	Three Months Ended March 31, 2024		Year Ended December 31, 2023
Total revenues	$	18,988	$	75,934
Operating income	3,107		10,707
Net income	1,531		4,766
Revenue from non-guarantors	645		2,393
Operating expenses to non-guarantors	615		2,569
Other expense to non-guarantors	(122)		(699)

The summarized balance sheet information for the consolidated obligor group of debt issued by Sprint is presented in the table below:

(in millions)	March 31, 2024		December 31, 2023
Current assets	$	12,020	$	11,193
Noncurrent assets	11,183		11,324
Current liabilities	12,391		12,751
Noncurrent liabilities	117,826		110,688
Due to non-guarantors	46,885		41,805
Due to related parties	1,563		1,576

The summarized results of operations information for the consolidated obligor group of debt issued by Sprint is presented in the table below:

(in millions)	Three Months Ended March 31, 2024		Year Ended December 31, 2023
Total revenues	$	4	$	19
Operating loss	(980)		(3,197)
Net loss	(2,259)		(7,629)
Other expense, net, to non-guarantors	(353)		(2,005)

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The summarized balance sheet information for the consolidated obligor group of debt issued by Sprint Capital Corporation is presented in the table below:

(in millions)	March 31, 2024		December 31, 2023
Current assets	$	12,021	$	11,193
Noncurrent assets	11,182		11,324
Current liabilities	12,462		12,823
Noncurrent liabilities	113,984		106,881
Due to non-guarantors	37,775		32,706
Due to related parties	1,563		1,576

The summarized results of operations information for the consolidated obligor group of debt issued by Sprint Capital Corporation is presented in the table below:

(in millions)	Three Months Ended March 31, 2024		Year Ended December 31, 2023
Total revenues	$	4	$	19
Operating loss	(980)		(3,197)
Net loss	(2,221)		(7,491)
Other expense, net, to non-guarantors	(242)		(1,489)

Performance Measures

In managing our business and assessing financial performance, we supplement the information provided by our condensed consolidated financial statements with other operating or statistical data and non-GAAP financial measures. These operating and financial measures are utilized by our management to evaluate our operating performance and, in certain cases, our ability to meet liquidity requirements. Although companies in the wireless industry may not define each of these measures in precisely the same way, we believe that these measures facilitate comparisons with other companies in the wireless industry on key operating and financial measures.

Postpaid Accounts

A postpaid account is generally defined as a billing account number that generates revenue. Postpaid accounts generally consist of customers that are qualified for postpaid service utilizing phones, High Speed Internet modems, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT), where they generally pay after receiving service.

The following table sets forth the number of ending postpaid accounts:

	As of March 31,		Change
(in thousands)	2024	2023	#	%
Postpaid accounts	30,015	28,813	1,202	4	%

Postpaid Net Account Additions

The following table sets forth the number of postpaid net account additions:

	Three Months Ended March 31,		Change
(in thousands)	2024	2023	#	%
Postpaid net account additions	218	287	(69)	(24)	%

Postpaid net account additions decreased 69,000, or 24%, primarily from fewer High Speed Internet only net account additions.

Customers

A customer is generally defined as a SIM number with a unique T-Mobile identifier which is associated with an account that generates revenue. Customers are qualified either for postpaid service utilizing phones, High Speed Internet modems, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT), where they generally pay after receiving service, or prepaid service, where they generally pay in advance of receiving service.

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The following table sets forth the number of ending customers:

	As of March 31,		Change
(in thousands)	2024	2023	#	%
Customers, end of period
Postpaid phone customers	76,468	73,372	3,096	4	%
Postpaid other customers	22,804	20,153	2,651	13	%
Total postpaid customers	99,272	93,525	5,747	6	%
Prepaid customers	21,600	21,392	208	1	%
Total customers	120,872	114,917	5,955	5	%

High Speed Internet customers included in Postpaid other customers were 4,634,000 and 2,855,000 as of March 31, 2024 and 2023, respectively. High Speed Internet customers included in Prepaid customers were 547,000 and 314,000 as of March 31, 2024 and 2023, respectively.

Net Customer Additions (Losses)

The following table sets forth the number of net customer additions (losses):

	Three Months Ended March 31,		Change
(in thousands)	2024	2023	#	%
Net customer additions (losses)
Postpaid phone customers	532	538	(6)	(1)	%
Postpaid other customers	688	755	(67)	(9)	%
Total postpaid customers	1,220	1,293	(73)	(6)	%
Prepaid customers	(48)	26	(74)	(285)	%
Total net customer additions	1,172	1,319	(147)	(11)	%

Total net customer additions decreased 147,000, or 11%, primarily from:

•Prepaid net customer losses, primarily due to lower gross additions driven by continued moderation of prepaid industry growth and lower net additions from High Speed Internet;

•Lower postpaid other net customer additions, primarily due to

•Lower net additions from High Speed Internet, primarily driven by increased deactivations from a growing customer base and lower gross additions driven by sunsetting of promotional pricing in order to maximize long-term value creation, partially offset by a lower churn rate;

•Lower net additions from wearables; partially offset by

•Higher net additions from other connected devices; and

•Slightly lower postpaid phone net customer additions, primarily due to increased deactivations from a growing customer base, mostly offset by lower churn and higher gross additions.

•High Speed Internet net customer additions included in postpaid other net customer additions were 346,000 and 445,000 for the three months ended March 31, 2024 and 2023, respectively. High Speed Internet net customer additions included in prepaid net customer (losses) additions were 59,000 and 78,000 for the three months ended March 31, 2024 and 2023, respectively.

Churn

Churn represents the number of customers whose service was deactivated as a percentage of the average number of customers during the specified period further divided by the number of months in the period. The number of customers whose service was deactivated is presented net of customers that subsequently had their service restored within a certain period of time and excludes customers who received service for less than a certain minimum period of time. We believe that churn provides management, investors and analysts with useful information to evaluate customer retention and loyalty.

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The following table sets forth the churn:

	Three Months Ended March 31,				Change
	2024		2023
Postpaid phone churn	0.86	%	0.89	%	-3 bps
Prepaid churn	2.75	%	2.76	%	-1 bps

Postpaid phone churn decreased 3 basis points, primarily from improved customer retention driven by value and network leadership.

Prepaid churn was relatively flat.

Postpaid Average Revenue Per Account

Postpaid Average Revenue per Account (“ARPA”) represents the average monthly postpaid service revenue earned per account. Postpaid ARPA is calculated as Postpaid revenues for the specified period divided by the average number of postpaid accounts during the period, further divided by the number of months in the period. We believe postpaid ARPA provides management, investors and analysts with useful information to assess and evaluate our postpaid service revenue realization and assists in forecasting our future postpaid service revenues on a per account basis. We consider postpaid ARPA to be indicative of our revenue growth potential given the increase in the average number of postpaid phone customers per account and increases in postpaid other customers, including High Speed Internet, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT).

The following table sets forth our operating measure ARPA:

(in dollars)	Three Months Ended March 31,				Change
	2024		2023		$		%
Postpaid ARPA	$	140.88	$	138.04	$	2.84	2	%

Postpaid ARPA increased $2.84, or 2%, primarily from:

•Higher premium services, primarily high-end rate plans, net of contra-revenue for content included in such plans, and discounts for specific affinity groups, such as 55+, Military and First Responder; and

•An increase in customers per account, including continued adoption of High Speed Internet; partially offset by

•Increased promotional activity; and

•An increase in High Speed Internet only accounts.

Average Revenue Per User

Average Revenue per User (“ARPU”) represents the average monthly service revenue earned per customer. ARPU is calculated as service revenues for the specified period divided by the average number of customers during the period, further divided by the number of months in the period. We believe ARPU provides management, investors and analysts with useful information to assess and evaluate our service revenue per customer and assist in forecasting our future service revenues generated from our customer base. Postpaid phone ARPU excludes postpaid other customers and related revenues, which include High Speed Internet, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT).

The following table sets forth our operating measure ARPU:

(in dollars)	Three Months Ended March 31,				Change
	2024		2023		$		%
Postpaid phone ARPU	$	48.79	$	48.63	$	0.16	—	%
Prepaid ARPU	37.18		37.98		(0.80)		(2)	%

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Postpaid Phone ARPU

Postpaid phone ARPU was relatively flat, primarily from:

•Higher premium services, primarily high-end rate plans, net of contra-revenue for content included in such plans, and discounts for specific affinity groups, such as 55+, Military and First Responders; offset by

•Increased promotional activity; and

•Growth in business customers with lower ARPU given larger account sizes.

Prepaid ARPU

Prepaid ARPU decreased $0.80, or 2%, primarily from dilution from rate plan mix.

Adjusted EBITDA and Core Adjusted EBITDA

Adjusted EBITDA represents earnings before Interest expense, net of Interest income, Income tax expense, Depreciation and amortization, stock-based compensation and certain expenses, gains and losses, which are not reflective of our ongoing operating performance (“Special Items”). Special Items include Merger-related costs, gain on disposal groups held for sale, certain legal-related recoveries and expenses, restructuring costs not directly attributable to the Merger (including severance), and other non-core gains and losses. Core Adjusted EBITDA represents Adjusted EBITDA less device lease revenues. Adjusted EBITDA margin represents Adjusted EBITDA divided by Service revenues. Core Adjusted EBITDA margin represents Core Adjusted EBITDA divided by Service revenues.

Adjusted EBITDA, Adjusted EBITDA margin, Core Adjusted EBITDA and Core Adjusted EBITDA margin are non-GAAP financial measures utilized by our management to monitor the financial performance of our operations. We historically used Adjusted EBITDA and we currently use Core Adjusted EBITDA internally as a measure to evaluate and compensate our personnel and management for their performance. We use Adjusted EBITDA and Core Adjusted EBITDA as benchmarks to evaluate our operating performance in comparison to our competitors. Management believes analysts and investors use Adjusted EBITDA and Core Adjusted EBITDA as supplemental measures to evaluate overall operating performance and to facilitate comparisons with other wireless communications services companies because they are indicative of our ongoing operating performance and trends by excluding the impact of interest expense from financing, non-cash depreciation and amortization from capital investments, non-cash stock-based compensation, and Special Items. Management believes analysts and investors use Core Adjusted EBITDA because it normalizes for the transition in the Company’s device financing strategy, by excluding the impact of device lease revenues from Adjusted EBITDA, to align with the exclusion of the related depreciation expense on leased devices from Adjusted EBITDA. Adjusted EBITDA, Adjusted EBITDA margin, Core Adjusted EBITDA and Core Adjusted EBITDA margin have limitations as analytical tools and should not be considered in isolation or as substitutes for income from operations, net income or any other measure of financial performance reported in accordance with GAAP.

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The following table illustrates the calculation of Adjusted EBITDA and Core Adjusted EBITDA and reconciles Adjusted EBITDA and Core Adjusted EBITDA to Net income, which we consider to be the most directly comparable GAAP financial measure:

	Three Months Ended March 31,						Change
(in millions, except percentages)	2024			2023			$		%
Net income	$	2,374		$	1,940		$	434	22	%
Adjustments:
Interest expense, net	880			835			45		5	%
Other income, net	(20)			(9)			(11)		122	%
Income tax expense	764			631			133		21	%
Operating income	3,998			3,397			601		18	%
Depreciation and amortization	3,371			3,203			168		5	%
Stock-based compensation (1)	140			173			(33)		(19)	%
Merger-related costs	130			358			(228)		(64)	%
Legal-related recoveries, net (2)	—			(43)			43		(100)	%
Gain on disposal group held for sale	—			(42)			42		(100)	%
Other, net (3)	13			153			(140)		(92)	%
Adjusted EBITDA	7,652			7,199			453		6	%
Lease revenues	(35)			(147)			112		(76)	%
Core Adjusted EBITDA	$	7,617		$	7,052		$	565	8	%
Net income margin (Net income divided by Service revenues)	15		%	12		%			300 bps
Adjusted EBITDA margin (Adjusted EBITDA divided by Service revenues)	48		%	46		%			200 bps
Core Adjusted EBITDA margin (Core Adjusted EBITDA divided by Service revenues)	47		%	45		%			200 bps

(1)Stock-based compensation includes payroll tax impacts and may not agree with stock-based compensation expense on the condensed consolidated financial statements. Additionally, certain stock-based compensation expenses associated with the Transactions have been included in Merger-related costs.

(2)Legal-related recoveries, net, consists of the settlement of certain litigation associated with the August 2021 cyberattack and is presented net of insurance recoveries.

(3)Other, net, primarily consists of certain severance, restructuring and other expenses, gains and losses, not directly attributable to the Merger which are not reflective of T-Mobile’s core business activities and are, therefore, excluded from Adjusted EBITDA and Core Adjusted EBITDA.

Core Adjusted EBITDA increased $565 million, or 8%. The components comprising Core Adjusted EBITDA are discussed further above.

The increase was primarily from:

•Higher Total service revenues;

•Lower Cost of services, excluding Special Items; and

•Lower Cost of equipment sales, excluding Special Items; partially offset by

•Lower Equipment revenues, excluding lease revenues; and

•Lower Other revenues.

Adjusted EBITDA increased $453 million, or 6%, primarily due to the fluctuations in Core Adjusted EBITDA, discussed above, partially offset by lower lease revenues, which decreased $112 million.

Liquidity and Capital Resources

Our principal sources of liquidity are our cash and cash equivalents and cash generated from operations, proceeds from issuance of debt, financing leases, the sale of certain receivables, the Revolving Credit Facility (as defined below) and an unsecured short-term commercial paper program. Further, the incurrence of additional indebtedness may inhibit our ability to incur new debt in the future to finance our business strategy under the terms governing our existing and future indebtedness.

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Cash Flows

The following is a condensed schedule of our cash flows:

	Three Months Ended March 31,				Change
(in millions)	2024		2023		$		%
Net cash provided by operating activities	$	5,084	$	4,051	$	1,033	25	%
Net cash used in investing activities	(1,787)		(1,728)		(59)		3	%
Net cash used in financing activities	(1,666)		(2,273)		607		(27)	%

Operating Activities

Net cash provided by operating activities increased $1.0 billion, or 25%, primarily from:

•A $714 million increase in Net income, adjusted for non-cash income and expense; and

•A $319 million decrease in net cash outflows from changes in working capital, primarily due to lower use of cash from Accounts receivable, Other current and long-term assets and Equipment installment plan receivables, partially offset by higher use of cash from Accounts payable and accrued liabilities and Operating lease right-of-use assets.

•Net cash provided by operating activities includes the impact of $293 million and $484 million in net payments for Merger-related costs for the three months ended March 31, 2024 and 2023, respectively.

Investing Activities

Net cash used in investing activities increased $59 million, or 3%. The use of cash was primarily from:

•$2.6 billion in Purchases of property and equipment, including capitalized interest, from the continued build-out of our nationwide 5G network; partially offset by

•$890 million in Proceeds related to beneficial interests in securitization transactions.

Financing Activities

Net cash used in financing activities decreased $607 million, or 27%. The use of cash was primarily from:

•$3.6 billion in Repurchases of common stock;

•$769 million in Dividends on common stock;

•$327 million in Repayments of financing lease obligations;

•$223 million in Repayments of long-term debt; and

•$192 million in Tax withholdings on share-based awards; partially offset by

•$3.5 billion in Proceeds from issuance of long-term debt.

Cash and Cash Equivalents

As of March 31, 2024, our Cash and cash equivalents were $6.7 billion compared to $5.1 billion at December 31, 2023.

Adjusted Free Cash Flow

Adjusted Free Cash Flow represents Net cash provided by operating activities less cash payments for Purchases of property and equipment, plus Proceeds from sales of tower sites and Proceeds related to beneficial interests in securitization transactions. Adjusted Free Cash Flow is a non-GAAP financial measure utilized by management, investors and analysts of our financial information to evaluate cash available to pay debt, repurchase shares, pay dividends and provide further investment in the business. Adjusted Free Cash Flow margin is calculated as Adjusted Free Cash Flow divided by Service Revenues. Adjusted Free Cash Flow margin is utilized by management, investors, and analysts to evaluate the Company’s ability to convert service revenue efficiently into cash available to pay debt, repurchase shares, pay dividends and provide further investment in the business.

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The table below provides a reconciliation of Adjusted Free Cash Flow to Net cash provided by operating activities, which we consider to be the most directly comparable GAAP financial measure:

	Three Months Ended March 31,						Change
(in millions, except percentages)	2024			2023			$		%
Net cash provided by operating activities	$	5,084		$	4,051		$	1,033	25	%
Cash purchases of property and equipment, including capitalized interest	(2,627)			(3,001)			374		(12)	%
Proceeds from sales of tower sites	—			6			(6)		(100)	%
Proceeds related to beneficial interests in securitization transactions	890			1,345			(455)		(34)	%
Adjusted Free Cash Flow	$	3,347		$	2,401		$	946	39	%
Net cash provided by operating activities margin (Net cash provided by operating activities divided by Service revenues)	32		%	26		%			600 bps
Adjusted Free Cash Flow margin (Adjusted Free Cash Flow divided by Service revenues)	21		%	15		%			600 bps

Adjusted Free Cash Flow increased $946 million, or 39%, primarily from:

•Higher Net cash provided by operating activities, as described above; and

•Lower Cash purchases of property and equipment, including capitalized interest, driven by increased capital efficiencies from accelerated investments in our nationwide 5G network in previous years; partially offset by

•Lower Proceeds related to beneficial interests in securitization transactions, which were offset in Net cash provided by operating activities.

•Adjusted Free Cash Flow includes the impact of $293 million and $484 million in net payments for Merger-related costs for the three months ended March 31, 2024 and 2023, respectively.

During the three months ended March 31, 2024 and 2023, there were no significant net cash proceeds from securitization.

Borrowing Capacity

We maintain a revolving credit facility (the “Revolving Credit Facility”) with an aggregate commitment amount of $7.5 billion. As of March 31, 2024, there was no outstanding balance under the Revolving Credit Facility.

We maintain an unsecured short-term commercial paper program with the ability to borrow up to $2.0 billion from time to time. This program supplements our other available external financing arrangements and proceeds are expected to be used for general corporate purposes. As of March 31, 2024, there was no outstanding balance under this program.

Debt Financing

As of March 31, 2024, our total debt and financing lease liabilities were $80.6 billion, excluding our tower obligations, of which $72.9 billion was classified as long-term debt and $1.2 billion was classified as long-term financing lease liabilities.

During the three months ended March 31, 2024, we issued long-term debt for net proceeds of $3.5 billion and repaid short-term debt with an aggregate principal amount of $223 million.

For more information regarding our debt financing transactions, see Note 7 - Debt of the Notes to the Condensed Consolidated Financial Statements.

License Purchase Agreements

On August 8, 2022, we entered into License Purchase Agreements to acquire spectrum in the 600 MHz band from Channel 51 License Co LLC and LB License Co, LLC in exchange for total cash consideration of $3.5 billion. On March 30, 2023, we and the Sellers entered into Amended and Restated License Purchase Agreements, pursuant to which we and the Sellers agreed to bifurcate the transaction into two tranches of licenses, with the closings on the acquisitions of certain licenses in Chicago, Dallas and New Orleans being deferred in order to potentially expedite the regulatory approval process for the remainder of the licenses. Subsequently, on August 25, 2023, we and the Sellers entered into Amendments No. 1 to the Amended and Restated License Purchase Agreements, whereby we deferred the closings of certain additional licenses in Chicago and Dallas into the second closing tranche. Together, the licenses with closings deferred into the second closing tranche represent approximately $1.1 billion of the aggregate $3.5 billion cash consideration.

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The FCC approved the purchase of the first tranche on December 29, 2023, and we expect the closing of the first tranche to occur in the second quarter of 2024, with the associated cash payment expected to occur in the third quarter of 2024. We anticipate that the second closing (on the deferred licenses) will occur in late 2024 or early 2025.

The parties have agreed that each of the closings will occur within 180 days after the receipt of the applicable required regulatory approvals, and payment of each portion of the aggregate $3.5 billion purchase price will occur no later than 40 days after the date of each respective closing.

On September 12, 2023, we entered into a License Purchase Agreement with Comcast pursuant to which we will acquire spectrum in the 600 MHz band from Comcast in exchange for total cash consideration of between $1.2 billion and $3.3 billion, subject to an application for FCC approval. The licenses are subject to an exclusive leasing arrangement between us and Comcast entered into contemporaneously with the License Purchase Agreement. We anticipate the closing will occur in the first half of 2028.

Acquisition of Ka’ena Corporation

On March 9, 2023, we entered into a Merger and Unit Purchase Agreement for the Ka’ena Acquisition. On March 13, 2024, we entered into Amendment No. 1 to the Merger and Unit Purchase Agreement, which amended, among other things, certain mechanics of the payment of the purchase consideration for the Ka’ena Acquisition which will result in a nominal increase in the percentage of cash compared to shares of T-Mobile common stock to be paid out as part of the total purchase price. The purchase price is variable, dependent upon specified performance indicators of Ka’ena during certain periods before and after closing, and consists of an upfront payment at closing of the transaction, subject to certain agreed-upon working capital and other adjustments, and a variable earnout payable 24 months after closing of the transaction. Our estimate of the upfront payment is subject to Ka’ena’s underlying business performance and the timing of transaction close, and is currently estimated to be $1.2 billion, before working capital and other adjustments, which we currently estimate will result in a net upfront payment of approximately $950 million, with approximately 45% to be paid in cash. Subsequent to March 31, 2024, on April 25, 2024, we received all necessary regulatory approvals and the Ka’ena Acquisition is expected to close on May 1, 2024.

Lumos Acquisition

Subsequent to March 31, 2024, on April 24, 2024, we entered into a Merger Agreement with a fund operated by EQT Infrastructure VI fund (“Fund VI”) for the joint acquisition by us and Fund VI of Lumos, a fiber-to-the-home platform (“Lumos”), from EQT’s predecessor fund EQT Infrastructure III. The Lumos acquisition is expected to close in late 2024 or early 2025, subject to customary closing conditions and regulatory approvals. At closing, we expect to invest approximately $950 million in the joint venture to acquire a 50% equity interest and all existing fiber customers. The funds invested by us will be used to fund future fiber builds. In addition, we are expected to contribute an additional commitment of approximately $500 million between 2027 and 2028.

Off-Balance Sheet Arrangements

We have arrangements, as amended from time to time, to sell certain EIP accounts receivable and service accounts receivable on a revolving basis as a source of liquidity. As of March 31, 2024, we derecognized net receivables of $2.2 billion upon sale through these arrangements.

For more information regarding these off-balance sheet arrangements, see Note 4 – Sales of Certain Receivables of the Notes to the Condensed Consolidated Financial Statements.

Future Sources and Uses of Liquidity

We may seek additional sources of liquidity, including through the issuance of additional debt, to continue to opportunistically acquire spectrum licenses or other long-lived assets in private party transactions, repurchase shares, pay dividends or for the refinancing of existing long-term debt on an opportunistic basis. Excluding liquidity that could be needed for acquisitions of businesses, spectrum and other long-lived assets, or for any potential stockholder returns, we expect our principal sources of funding to be sufficient to meet our anticipated liquidity needs for business operations for the next 12 months, as well as our longer-term liquidity needs. Our intended use of any such funds is for general corporate purposes, including for capital expenditures, spectrum purchases, opportunistic investments and acquisitions, redemption of debt, tower obligations, share repurchases, and dividend payments.

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We determine future liquidity requirements for operations, capital expenditures, share repurchases and dividend payments based in large part upon projected financial and operating performance, and opportunities to acquire additional spectrum or repurchase shares. We regularly review and update these projections for changes in current and projected financial and operating results, general economic conditions, the competitive landscape and other factors. We have incurred, and will incur, substantial expenses to comply with the Government Commitments, and we also expect to incur all of the remaining restructuring and integration costs associated with the Merger by the first half of 2024, with the cash expenditures for the Merger-related costs extending beyond 2024. There are a number of additional risks and uncertainties that could cause our financial and operating results and capital requirements to differ materially from our projections, which could cause future liquidity to differ materially from our assessment.

The indentures, supplemental indentures and credit agreements governing our long-term debt to affiliates and third parties, excluding financing leases, contain covenants that, among other things, limit the ability of the Issuers or borrowers and the Guarantor Subsidiaries to incur more debt, create liens or other encumbrances, and merge, consolidate or sell, or otherwise dispose of, substantially all of their assets. We were in compliance with all restrictive debt covenants as of March 31, 2024.

Financing Lease Facilities

We have uncommitted financing lease facilities with certain third parties that provide us with the ability to enter into financing leases for network equipment and services. As of March 31, 2024, we have entered into $9.0 billion of financing leases under these financing lease facilities, of which $258 million was executed during the three months ended March 31, 2024. We expect to enter into up to a total of $1.2 billion in financing lease commitments during the year ending December 31, 2024.

Capital Expenditures

Our liquidity requirements have been driven primarily by capital expenditures for spectrum licenses, the construction, expansion and upgrading of our network infrastructure and the integration of the networks, spectrum, technology, personnel and customer base of T-Mobile and Sprint. Property and equipment capital expenditures primarily relate to the integration of our network and spectrum licenses, including acquired Sprint PCS and 2.5 GHz spectrum licenses, as we build out our nationwide 5G network. We expect a reduction in capital expenditures related to these efforts in 2024 compared to 2023 given the substantial deployment of the 5G network completed in the preceding years. Future capital expenditure requirements will include the deployment of our recently acquired C-band and 3.45 GHz spectrum licenses.

For more information regarding our spectrum licenses, see Note 5 - Spectrum License Transactions of the Notes to the Condensed Consolidated Financial Statements.

Stockholder Returns

On September 6, 2023, our Board of Directors authorized our 2023-2024 Stockholder Return Program for up to $19.0 billion that will run from October 1, 2023, through December 31, 2024. The 2023-2024 Stockholder Return Program consists of repurchases of shares of our common stock and the payment of cash dividends. We intend to declare and pay approximately $3.0 billion in total dividends in 2024, with payments occurring each quarter during the year. The dividend amount paid per share is expected to grow by around 10% annually with the first increase expected in the fourth quarter of 2024; however, the declaration and payment of all dividends is subject to the discretion of our Board of Directors and will depend on financial and legal requirements and other considerations. The amount available under the 2023-2024 Stockholder Return Program for share repurchases will be reduced by the amount of any cash dividends declared and paid by us.

On January 24, 2024, our Board of Directors declared a cash dividend of $0.65 per share on our issued and outstanding common stock, which was paid on March 14, 2024, to stockholders of record as of the close of business on March 1, 2024.

On March 15, 2024, our Board of Directors declared a cash dividend of $0.65 per share on our issued and outstanding shares of common stock, which is payable on June 13, 2024, to stockholders of record as of the close of business on May 31, 2024.

During the three months ended March 31, 2024, we paid an aggregate of $769 million in cash dividends to our stockholders, which was presented within Net cash used in financing activities on our Condensed Consolidated Statements of Cash Flows. As of March 31, 2024, $756 million for dividends payable is presented within Other current liabilities on our Condensed Consolidated Balance Sheets.

40

During the three months ended March 31, 2024, we repurchased 21,933,790 shares of our common stock at an average price per share of $162.69 for a total purchase price of $3.6 billion under the 2023-2024 Stockholder Return Program. As of March 31, 2024, we had up to $11.7 billion remaining under the 2023-2024 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2024. The next quarterly cash dividend will be paid on June 13, 2024.

Subsequent to March 31, 2024, from April 1, 2024, through April 19, 2024, we repurchased 5,427,946 shares of our common stock at an average price per share of $160.97 for a total purchase price of $874 million. As of April 19, 2024, we had up to $10.8 billion remaining under the 2023-2024 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2024.

For additional information regarding the 2023-2024 Stockholder Return Program, see Note 10 – Stockholder Return Program of the Notes to the Condensed Consolidated Financial Statements.

Related Party Transactions

We have related party transactions associated with DT, SoftBank or their respective affiliates in the ordinary course of business, including intercompany servicing and licensing.

As of April 19, 2024, DT and SoftBank held, directly or indirectly, approximately 50.4% and 7.9%, respectively, of the outstanding T-Mobile common stock, with the remaining approximately 41.7% of the outstanding T-Mobile common stock held by other stockholders. As a result of the Proxy, Lock-Up and ROFR Agreement, dated April 1, 2020, by and between DT and SoftBank, DT has voting control, as of April 19, 2024, over approximately 58.0% of the outstanding T-Mobile common stock.

Disclosure of Iranian Activities under Section 13(r) of the Exchange Act

Section 219 of the Iran Threat Reduction and the Syria Human Rights Act of 2012 added Section 13(r) to the Exchange Act. Section 13(r) requires an issuer to disclose in its annual or quarterly reports, as applicable, whether it or any of its affiliates knowingly engaged in certain activities, transactions or dealings relating to Iran or with designated natural persons or entities involved in terrorism or the proliferation of weapons of mass destruction. Disclosure is required even where the activities, transactions or dealings are conducted outside the U.S. by non-U.S. affiliates in compliance with applicable law, and whether or not the activities are sanctionable under U.S. law.

As of the date of this report, we are not aware of any activity, transaction or dealing by us or any of our affiliates for the three months ended March 31, 2024, that requires disclosure in this report under Section 13(r) of the Exchange Act, except as set forth below with respect to affiliates that we do not control and that are our affiliates solely due to their common control with either DT or SoftBank. We have relied upon DT and SoftBank for information regarding their respective activities, transactions and dealings.

DT, through certain of its non-U.S. subsidiaries, is party to roaming and interconnect agreements with the following mobile and fixed line telecommunication providers in Iran, some of which are or may be government-controlled entities: Irancell Telecommunications Services Company, Telecommunication Kish Company, Mobile Telecommunication Company of Iran, and Telecommunication Infrastructure Company of Iran. In addition, during the three months ended March 31, 2024, DT, through certain of its non-U.S. subsidiaries, provided basic telecommunications services to five customers in Germany identified on the Specially Designated Nationals and Blocked Persons List maintained by the U.S. Department of Treasury’s Office of Foreign Assets Control: Bank Melli, Europäisch-Iranische Handelsbank, CPG Engineering & Commercial Services GmbH, Golgohar Trade and Technology GmbH and International Trade and Industrial Technology ITRITEC GmbH. These services have been terminated or are in the process of being terminated. For the three months ended March 31, 2024, gross revenues of all DT affiliates generated by roaming and interconnection traffic and telecommunications services with the Iranian parties identified herein were less than $0.1 million, and the estimated net profits were less than $0.1 million.

In addition, DT, through certain of its non-U.S. subsidiaries that operate a fixed-line network in their respective European home countries (in particular, Germany), provides telecommunications services in the ordinary course of business to the Embassy of Iran in those European countries. Gross revenues and net profits recorded from these activities for the three months ended March 31, 2024, were less than $0.1 million. We understand that DT intends to continue these activities.

Separately, SoftBank, through one of its non-U.S. subsidiaries, provides roaming services in Iran through Irancell Telecommunications Services Company. During the three months ended March 31, 2024, SoftBank had no gross revenues from such services and no net profit was generated. We understand that the SoftBank subsidiary intends to continue such services.

41

This subsidiary also provides telecommunications services in the ordinary course of business to accounts affiliated with the Embassy of Iran in Japan. During the three months ended March 31, 2024, SoftBank estimates that gross revenues and net profit generated by such services were both under $0.1 million. We understand that the SoftBank subsidiary is obligated under contract and intends to continue such services.

In addition, SoftBank, through one of its non-U.S. indirect subsidiaries, provides office supplies to the Embassy of Iran in Japan. SoftBank estimates that gross revenues and net profit generated by such services during the three months ended March 31, 2024, were both under $0.1 million. We understand that the SoftBank subsidiary intends to continue such activities.

Critical Accounting Estimates

Preparation of our condensed consolidated financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the reported amounts of certain assets, liabilities, revenues and expenses, as well as related disclosure of contingent assets and liabilities. There have been no material changes to the critical accounting policies and estimates as previously disclosed in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2023, and which are hereby incorporated by reference herein.

Accounting Pronouncements Not Yet Adopted

For information regarding recently issued accounting standards, see Note 1 – Summary of Significant Accounting Policies of the Notes to the Condensed Consolidated Financial Statements.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes to the interest rate risk as previously disclosed in Part II, Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2023.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures designed to ensure information required to be disclosed in our periodic reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Our disclosure controls include the use of a Disclosure Committee which is comprised of representatives from our Accounting, Legal, Treasury, Technology, Risk Management, Government Affairs and Investor Relations functions and are designed to ensure that information required to be disclosed in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective, as of the end of the period covered by this Form 10-Q.

The certifications required by Section 302 of the Sarbanes-Oxley Act of 2002 (the “Sarbanes-Oxley Act”) are filed as Exhibits 31.1 and 31.2 to this Form 10-Q.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act, during our most recently completed fiscal quarter that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

For more information regarding the legal proceedings in which we are involved, see Note 12 – Commitments and Contingencies of the Notes to the Condensed Consolidated Financial Statements.

Item 1A. Risk Factors

Other than the updated risk factor below, there have been no material changes in our risk factors as previously disclosed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2023.

Our business may be adversely impacted if we are not able to successfully manage the ongoing arrangements entered into in connection with the Prepaid Transaction and known or unknown liabilities arising in connection therewith.

In connection with the closing of the Prepaid Transaction, we and DISH entered into certain arrangements, including a Master Network Services Agreement (the “MNSA”) and a License Purchase Agreement (as amended, the “DISH License Purchase Agreement”). Pursuant to the MNSA, DISH will receive network services from the Company for a period of seven years. As set forth in the MNSA, the Company provides DISH, among other things, (a) legacy network services for certain Boost Mobile prepaid end users on the Sprint network, (b) T-Mobile network services for certain end users that have been migrated to the T-Mobile network or provisioned on the T-Mobile network by or on behalf of DISH and (c) infrastructure mobile network operator services to assist in the access and integration of the DISH network. Pursuant to the DISH License Purchase Agreement, DISH agreed to purchase all of Sprint’s 800 MHz spectrum (approximately 13.5 MHz of nationwide spectrum) for a total of $3.6 billion. The DISH License Purchase Agreement terminated in accordance with its terms when DISH failed to purchase such spectrum on or prior to April 1, 2024, allowing the Company to retain a non-refundable extension fee of $100 million paid by DISH. T-Mobile has commenced an auction sale of all of Sprint’s 800 MHz spectrum under the terms set forth in the Final Judgment, but is not required to divest such spectrum for an amount less than $3.6 billion.

Failure to successfully manage the MNSA and the spectrum auction may result in material unanticipated problems, including diversion of management time and energy, significant expenses and liabilities. In addition, if the 800 MHz spectrum is sold at auction, there may be an increase in competition from the purchaser or purchasers of such spectrum and other third parties that such purchaser or purchasers may enter into commercial agreements with, who may be significantly larger and have greater resources and scale advantages as compared to us. Such increased competition may result in our loss of customers and other business relationships.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

The table below provides information regarding our share repurchases during the three months ended March 31, 2024:

(in millions, except share and per share amounts)	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that may yet be Purchased Under the Plans or Programs (1)
January 1, 2024 - January 31, 2024	9,024,140	$	162.98	9,024,140	$	14,541
February 1, 2024 - February 29, 2024	6,306,134	162.13		6,306,134	13,518
March 1, 2024 - March 31, 2024	6,603,516	162.82		6,603,516	11,675
Total	21,933,790			21,933,790

(1)    On September 6, 2023, our Board of Directors authorized our 2023-2024 Stockholder Return Program of up to $19.0 billion of repurchases of our common stock and payment of dividends through December 31, 2024. The amounts presented represent the remaining dollar amount authorized for purchase under the 2023-2024 Stockholder Return Program as of the end of the period, which has been reduced by the amount of any cash dividends paid by the Company.

See Note 10 - Stockholder Return Program of the Notes to the Condensed Consolidated Financial Statements for more information about our 2023-2024 Stockholder Return Program.

43

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

On February 21, 2024, Jonathan Freier, the Company’s President, Consumer Group, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell up to 30,000 shares of the Company’s common stock between May 23, 2024, and October 31, 2024, subject to certain conditions. The duration of this trading plan is 253 days.

On February 21, 2024, Mark Nelson, the Company’s Executive Vice President and General Counsel, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell all of the Company’s common stock he acquires on October 11, 2024, and February 15, 2025, respectively, upon the vesting of certain time-based restricted stock unit awards and performance-based restricted stock unit awards (“PRSUs”), for a total of up to 167,923 shares if the PRSUs vest at maximum value, subject to certain conditions. The duration of this trading plan is 360 days.

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Item 6. Exhibits

		Incorporated by Reference
Exhibit No.	Exhibit Description	Form	Date of First Filing	Exhibit Number	Filed Herein
4.1	Twelfth Supplemental Indenture, dated as of January 12, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.850% Senior Note due 2029.	8-K	1/12/2024	4.2
4.2	Thirteenth Supplemental Indenture, dated as of January 12, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.150% Senior Note due 2034.	8-K	1/12/2024	4.3
4.3	Fourteenth Supplemental Indenture, dated as of January 12, 2024, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.500% Senior Note due 2055.	8-K	1/12/2024	4.4
22.1	Subsidiary Guarantors and Issuers of Guaranteed Securities.				X
31.1	Certifications of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				X
31.2	Certifications of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				X
32.1**	Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.				X
32.2**	Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.				X
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document.				X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.				X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.				X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.				X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase.				X
104	Cover Page Interactive Data File (the cover page XBRL tags)

** Furnished herein.

45

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	T-MOBILE US, INC.
April 26, 2024	/s/ Peter Osvaldik
	Peter Osvaldik
	Executive Vice President and Chief Financial Officer
	(Principal Financial Officer and Authorized Signatory)

46

EX-22.1

EXHIBIT 22.1

Subsidiary Guarantors and Issuers of Guaranteed Securities

Guaranteed Securities

The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of March 31, 2024, including those that may no longer be subject to reporting as provided by Regulation S-X Rule 13-01:

Description of Notes

3.500% senior notes due 2025

1.500% senior notes due 2026

2.250% senior notes due 2026

2.625% senior notes due 2026

3.750% senior notes due 2027

5.375% senior notes due 2027

4.750% senior notes due 2028

4.750% senior notes due 2028-1 held by affiliate

2.050% senior notes due 2028

4.950% senior notes due 2028

4.800% senior notes due 2028

4.850% senior notes due 2029

2.625% senior notes due 2029

2.400% senior notes due 2029

3.375% senior notes due 2029

3.875% senior notes due 2030

2.550% senior notes due 2031

2.875% senior notes due 2031

3.500% senior notes due 2031

2.250% senior notes due 2031

2.700% senior notes due 2032

5.200% senior notes due 2033

5.050% senior notes due 2033

5.750% senior notes due 2034

5.150% senior notes due 2034

4.375% senior notes due 2040

3.000% senior notes due 2041

4.500% senior notes due 2050

3.300% senior notes due 2051

3.400% senior notes due 2052

5.650% senior notes due 2053

5.750% senior notes due 2054

6.000% senior notes due 2054

5.500% senior notes due 2055

3.600% senior notes due 2060

5.800% senior notes due 2062

The following securities (collectively, the “Sprint Senior Notes”) issued by Sprint LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company, were outstanding as of March 31, 2024, including those that may no longer be subject to reporting as provided by Regulation S-X Rule 13-01:

Description of Notes

7.125% senior notes due 2024

7.625% senior notes due 2025

7.625% senior notes due 2026

The following securities (collectively, the “Sprint Capital Corporation Senior Notes”) issued by Sprint Capital Corporation, a Delaware corporation and wholly-owned subsidiary of the Company, were outstanding as of March 31, 2024, including those that may no longer be subject to reporting as provided by Regulation S-X Rule 13-01:

Description of Notes

6.875% senior notes due 2028

8.750% senior notes due 2032

Obligors

As of March 31, 2024, the obligors under the T-Mobile USA Senior Notes consisted of the Company, as a guarantor, and its subsidiaries listed in the following table.

Name of Subsidiary	Jurisdiction of Organization	Obligor Type
American Telecasting of Seattle, LLC	Delaware	Guarantor
APC Realty and Equipment Company, LLC	Delaware	Guarantor
Assurance Wireless of South Carolina, LLC	Delaware	Guarantor
Assurance Wireless USA, L.P.	Delaware	Guarantor
ATI Sub, LLC	Delaware	Guarantor
Clearwire Communications LLC	Delaware	Guarantor
Clearwire Legacy LLC	Delaware	Guarantor
Clearwire Spectrum Holdings II LLC	Nevada	Guarantor
Clearwire Spectrum Holdings III LLC	Nevada	Guarantor
Clearwire Spectrum Holdings LLC	Nevada	Guarantor
Fixed Wireless Holdings, LLC	Delaware	Guarantor
IBSV LLC	Delaware	Guarantor
MetroPCS California, LLC	Delaware	Guarantor
MetroPCS Florida, LLC	Delaware	Guarantor
MetroPCS Georgia, LLC	Delaware	Guarantor
MetroPCS Massachusetts, LLC	Delaware	Guarantor
MetroPCS Michigan, LLC	Delaware	Guarantor
MetroPCS Nevada, LLC	Delaware	Guarantor
MetroPCS New York, LLC	Delaware	Guarantor
MetroPCS Pennsylvania, LLC	Delaware	Guarantor
MetroPCS Texas, LLC	Delaware	Guarantor
Nextel South Corp.	Georgia	Guarantor
Nextel Systems, LLC	Delaware	Guarantor
Nextel West Corp.	Delaware	Guarantor
NSAC, LLC	Delaware	Guarantor
PRWireless PR, LLC	Delaware	Guarantor
PushSpring, LLC	Delaware	Guarantor
Sprint Capital Corporation	Delaware	Guarantor
Sprint Communications LLC	Delaware	Guarantor
Sprint LLC	Delaware	Guarantor
Sprint Solutions LLC	Delaware	Guarantor
Sprint Spectrum LLC	Delaware	Guarantor
Sprint Spectrum Realty Company, LLC	Delaware	Guarantor
SprintCom LLC	Kansas	Guarantor
T-Mobile Central LLC	Delaware	Guarantor
T-Mobile Financial LLC	Delaware	Guarantor
T-Mobile Innovations LLC	Delaware	Guarantor

T-Mobile Leasing LLC	Delaware	Guarantor
T-Mobile License LLC	Delaware	Guarantor
T-Mobile Northeast LLC	Delaware	Guarantor
T-Mobile Puerto Rico Holdings LLC	Delaware	Guarantor
T-Mobile Puerto Rico LLC	Delaware	Guarantor
T-Mobile Resources LLC	Delaware	Guarantor
T-Mobile South LLC	Delaware	Guarantor
T-Mobile USA, Inc.	Delaware	Issuer
T-Mobile West LLC	Delaware	Guarantor
TDI Acquisition Sub, LLC	Delaware	Guarantor
TMUS International LLC	Delaware	Guarantor
TVN Ventures LLC	Delaware	Guarantor
VMU GP, LLC	Delaware	Guarantor
WBSY Licensing, LLC	Delaware	Guarantor

As of March 31, 2024, the obligors under the Sprint Senior Notes consisted of the Company, as a guarantor; Sprint LLC (a Delaware limited liability company), as issuer and T-Mobile USA, Inc. (a Delaware corporation) and Sprint Communications LLC (a Delaware limited liability company) as guarantors.

As of March 31, 2024, the obligors under the Sprint Capital Corporation Senior Notes consisted of the Company, as a guarantor; Sprint Capital Corporation (a Delaware corporation), as issuer and T-Mobile USA, Inc. (a Delaware corporation), Sprint LLC (a Delaware limited liability company) and Sprint Communications LLC (a Delaware limited liability company) as guarantors.

EX-31.1

EXHIBIT 31.1

Certifications of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, G. Michael Sievert, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of T-Mobile US, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

April 26, 2024

/s/ G. Michael Sievert

G. Michael Sievert
Chief Executive Officer

EX-31.2

EXHIBIT 31.2

Certifications of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Peter Osvaldik, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of T-Mobile US, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

April 26, 2024

/s/ Peter Osvaldik

Peter Osvaldik
Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of T-Mobile US, Inc. (the “Company”), on Form 10-Q for the quarter ended March 31, 2024, as filed with the Securities and Exchange Commission (the “Report”), G. Michael Sievert, Chief Executive Officer of the Company, does hereby certify, pursuant to § 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. § 1350), that to his knowledge:

1.The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

April 26, 2024

/s/ G. Michael Sievert

G. Michael Sievert
Chief Executive Officer

EX-32.2

EXHIBIT 32.2

Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of T-Mobile US, Inc. (the “Company”), on Form 10-Q for the quarter ended March 31, 2024, as filed with the Securities and Exchange Commission (the “Report”), Peter Osvaldik, Executive Vice President and Chief Financial Officer of the Company, does hereby certify, pursuant to § 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. § 1350), that to his knowledge:

1.The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

April 26, 2024

/s/ Peter Osvaldik

Peter Osvaldik
Executive Vice President and Chief Financial Officer

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Cover Page - shares	3 Months Ended
	Mar. 31, 2024	Apr. 19, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	1-33409
Entity Registrant Name	T-MOBILE US, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-0836269
Entity Address, Address Line One	12920 SE 38th Street
Entity Address, City or Town	Bellevue
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98006-1350
City Area Code	(425)
Local Phone Number	378-4000
Title of 12(b) Security	Common Stock, par value $0.00001 per share
Trading Symbol	TMUS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		1,171,854,259
Entity Central Index Key	0001283699
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31

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Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 6,708	$ 5,135
Accounts receivable, net of allowance for credit losses of $161 and $161	4,253	4,692
Equipment installment plan receivables, net of allowance for credit losses and imputed discount of $614 and $623	4,059	4,456
Inventory	1,521	1,678
Prepaid expenses	715	702
Other current assets	2,039	2,352
Total current assets	19,295	19,015
Property and equipment, net	39,286	40,432
Operating lease right-of-use assets	26,766	27,135
Financing lease right-of-use assets	3,180	3,270
Goodwill	12,234	12,234
Spectrum licenses	97,154	96,707
Other intangible assets, net	2,445	2,618
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount of $143 and $150	1,908	2,042
Other assets	4,000	4,229
Total assets	206,268	207,682
Current liabilities
Accounts payable and accrued liabilities	7,720	10,373
Short-term debt	5,356	3,619
Deferred revenue	846	825
Short-term operating lease liabilities	3,443	3,555
Short-term financing lease liabilities	1,265	1,260
Other current liabilities	1,933	1,296
Total current liabilities	20,563	20,928
Tower obligations	3,751	3,777
Deferred tax liabilities	14,187	13,458
Operating lease liabilities	27,827	28,240
Financing lease liabilities	1,163	1,236
Other long-term liabilities	3,846	3,929
Total long-term liabilities	123,631	122,039
Commitments and contingencies (Note 12)
Stockholders' equity
Common stock, par value $0.00001 per share, 2,000,000,000 shares authorized; 1,266,294,032 and 1,262,904,154 shares issued, 1,177,240,110 and 1,195,807,331 shares outstanding	0	0
Additional paid-in capital	67,786	67,705
Treasury stock, at cost, 89,053,922 and 67,096,823 shares	(12,982)	(9,373)
Accumulated other comprehensive loss	(926)	(964)
Retained earnings	8,196	7,347
Total stockholders' equity	62,074	64,715
Total liabilities and stockholders' equity	206,268	207,682
Nonrelated Party
Current liabilities
Long-term debt	71,361	69,903
Related Party
Current liabilities
Long-term debt	$ 1,496	$ 1,496

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Allowance for credit losses	$ 161	$ 161
Allowance for credit losses and imputed discount current	614	623
Allowance for credit losses and imputed discount noncurrent	$ 143	$ 150
Common stock, par value (in USD per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	1,266,294,032	1,262,904,154
Common stock, shares outstanding (in shares)	1,177,240,110	1,195,807,331
Treasury stock, at cost (in shares)	89,053,922	67,096,823

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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Revenues	$ 19,594	$ 19,632
Operating expenses
Selling, general and administrative	5,138	5,425
Gain on disposal group held for sale	0	(42)
Depreciation and amortization	3,371	3,203
Total operating expenses	15,596	16,235
Operating income	3,998	3,397
Other expense, net
Interest expense, net	(880)	(835)
Other income, net	20	9
Total other expense, net	(860)	(826)
Income before income taxes	3,138	2,571
Income tax expense	(764)	(631)
Net income	2,374	1,940
Other comprehensive income, net of tax
Reclassification of loss from cash flow hedges, net of tax effect of $15 and $14	43	40
Unrealized gain on foreign currency translation adjustment, net of tax effect of $0, and $0	0	2
Amortization of actuarial gain, net of tax effect of $(2) and $0	(5)	0
Other comprehensive income	38	42
Total comprehensive income	$ 2,412	$ 1,982
Earnings per share
Basic (in USD per share)	$ 2.00	$ 1.59
Diluted (in USD per share)	$ 2.00	$ 1.58
Weighted-average shares outstanding
Basic (in shares)	1,185,298,497	1,219,608,362
Diluted (in shares)	1,189,092,019	1,224,604,698
Service
Revenues
Revenues	$ 16,096	$ 15,546
Operating expenses
Cost of services, exclusive of depreciation and amortization shown separately below	2,688	3,061
Postpaid revenues
Revenues
Revenues	12,631	11,862
Prepaid revenues
Revenues
Revenues	2,403	2,417
Wholesale and other service revenues
Revenues
Revenues	1,062	1,267
Equipment revenues
Revenues
Revenues	3,251	3,719
Operating expenses
Cost of services, exclusive of depreciation and amortization shown separately below	4,399	4,588
Other revenues
Revenues
Revenues	$ 247	$ 367

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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Cash flow hedges, tax effect	$ 15	$ 14
Foreign currency translation adjustment, tax effect	0	0
Amortization of actuarial gain, net of tax effect	$ (2)	$ 0

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income	$ 2,374	$ 1,940
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	3,371	3,203
Stock-based compensation expense	140	177
Deferred income tax expense	715	611
Bad debt expense	282	222
Losses from sales of receivables	21	38
Gain on remeasurement of disposal group held for sale	0	(13)
Changes in operating assets and liabilities
Accounts receivable	(416)	(1,268)
Equipment installment plan receivables	277	152
Inventory	170	129
Operating lease right-of-use assets	856	1,008
Other current and long-term assets	160	(142)
Accounts payable and accrued liabilities	(1,734)	(882)
Short- and long-term operating lease liabilities	(1,017)	(1,009)
Other current and long-term liabilities	(172)	(183)
Other, net	57	68
Net cash provided by operating activities	5,084	4,051
Investing activities
Purchases of property and equipment, including capitalized interest of $(9) and $(14)	(2,627)	(3,001)
Purchases of spectrum licenses and other intangible assets, including deposits	(61)	(73)
Proceeds from sales of tower sites	0	6
Proceeds related to beneficial interests in securitization transactions	890	1,345
Other, net	11	(5)
Net cash used in investing activities	(1,787)	(1,728)
Financing activities
Proceeds from issuance of long-term debt	3,473	3,013
Repayments of financing lease obligations	(327)	(306)
Repayments of long-term debt	(223)	(131)
Repurchases of common stock	(3,594)	(4,619)
Dividends on common stock	(769)	0
Tax withholdings on share-based awards	(192)	(187)
Other, net	(34)	(43)
Net cash used in financing activities	(1,666)	(2,273)
Change in cash and cash equivalents, including restricted cash and cash held for sale	1,631	50
Cash and cash equivalents, including restricted cash and cash held for sale
Beginning of period	5,307	4,674
End of period	$ 6,938	$ 4,724

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Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Cash Flows [Abstract]
Capitalized interest	$ (9)	$ (14)

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Condensed Consolidated Statement of Stockholders’ Equity - USD ($) $ in Millions	Total	Common Stock Outstanding	Treasury Shares Outstanding	Par Value and Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings (Accumulated Deficit)
Beginning balance (in shares) at Dec. 31, 2022		1,233,960,078
Beginning balance of treasury stock, (in shares) at Dec. 31, 2022	22,916,449
Beginning balance at Dec. 31, 2022	$ 69,656		$ (3,016)	$ 73,941	$ (1,046)	$ (223)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,940					1,940
Other comprehensive income	42				42
Stock-based compensation	155			155
Stock issued for employee stock purchase plan (in shares)		1,063,426
Stock issued for employee stock purchase plan	126			126
Issuance of vested restricted stock units (in shares)		3,844,801
Shares withheld related to net share settlement of stock awards and stock options (in shares)		(1,263,356)
Shares withheld related to net share settlement of stock awards and stock options	(187)			(187)
Repurchases of common stock (in shares)		(32,963,940)	(32,963,940)
Repurchases of common stock	(4,810)		$ (4,810)
Other, net (in shares)		55,316	30,275
Other, net	3		$ (5)	8
Ending balance (in shares) at Mar. 31, 2023		1,204,696,325
Ending balance of treasury stock, (in shares) at Mar. 31, 2023			55,910,664
Ending balance at Mar. 31, 2023	$ 66,925		$ (7,831)	74,043	(1,004)	1,717
Beginning balance (in shares) at Dec. 31, 2023	1,195,807,331	1,195,807,331
Beginning balance of treasury stock, (in shares) at Dec. 31, 2023	67,096,823		67,096,823
Beginning balance at Dec. 31, 2023	$ 64,715		$ (9,373)	67,705	(964)	7,347
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,374					2,374
Dividends declared	(1,525)					(1,525)
Other comprehensive income	38				38
Stock-based compensation	152			152
Stock issued for employee stock purchase plan (in shares)		950,082
Stock issued for employee stock purchase plan	112			112
Issuance of vested restricted stock units (in shares)		3,525,790
Shares withheld related to net share settlement of stock awards and stock options (in shares)		(1,171,055)
Shares withheld related to net share settlement of stock awards and stock options	(192)			(192)
Repurchases of common stock (in shares)		(21,933,790)	(21,933,790)
Repurchases of common stock	(3,604)		$ (3,604)
Other, net (in shares)		61,752	23,309
Other, net	$ 4		$ (5)	9
Ending balance (in shares) at Mar. 31, 2024	1,177,240,110	1,177,240,110
Ending balance of treasury stock, (in shares) at Mar. 31, 2024	89,053,922		89,053,922
Ending balance at Mar. 31, 2024	$ 62,074		$ (12,982)	$ 67,786	$ (926)	$ 8,196

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Condensed Consolidated Statement of Stockholders’ Equity (Parenthetical)	3 Months Ended
	Mar. 31, 2024 $ / shares
Statement of Stockholders' Equity [Abstract]
Common stock, dividends declared (in USD per share)	$ 1.30

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Significant Accounting Policies

Note 1 – Summary of Significant Accounting Policies

Basis of Presentation

The unaudited condensed consolidated financial statements of T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”) include all adjustments of a normal recurring nature necessary for the fair presentation of the results for the interim periods presented. The results for the interim periods are not necessarily indicative of those for the full year. The condensed consolidated financial statements should be read in conjunction with our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2023.

The condensed consolidated financial statements include the balances and results of operations of T-Mobile and our consolidated subsidiaries. We consolidate majority-owned subsidiaries over which we exercise control, as well as variable interest entities (“VIEs”) for which we are deemed to be the primary beneficiary and VIEs, which cannot be deconsolidated, such as those related to our obligations to pay for the management and operation of certain of our wireless communications tower sites. Intercompany transactions and balances have been eliminated in consolidation.

The preparation of financial statements in conformity with United States (“U.S.”) generally accepted accounting principles (“GAAP”) requires our management to make estimates and assumptions that affect the financial statements and accompanying notes. Estimates are based on historical experience, where applicable, and other assumptions that management believes are reasonable under the circumstances. Estimates are inherently subject to judgment and actual results could differ from those estimates.

Accounting Pronouncements Not Yet Adopted

Segment Reporting Disclosures

In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The standard expands reportable segment disclosure requirements for public business entities primarily through enhanced disclosures about significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit (referred to as the “significant expense principle”). The standard will become effective for us for our fiscal year 2024 annual financial statements and interim financial statements thereafter and will be applied retrospectively for all prior periods presented in the financial statements, with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2024 annual financial statements. We are currently evaluating the impact this guidance will have on the disclosures included in the Notes to the Consolidated Financial Statements.

Income Tax Disclosures

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The standard enhances income tax disclosure requirements for all entities by requiring specified categories and greater disaggregation within the rate reconciliation table, disclosure of income taxes paid by jurisdiction, and providing clarification on uncertain tax positions and related financial statement impacts. The standard will be effective for us for our fiscal year 2025 annual financial statements with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2025 annual financial statements, and we expect the adoption of the standard will impact certain of our income tax disclosures.

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Business Combination

3 Months Ended

Mar. 31, 2024

Business Combination and Asset Acquisition [Abstract]

Business Combination

Note 2 – Business Combination

Acquisition of Ka’ena Corporation

On March 9, 2023, we entered into a Merger and Unit Purchase Agreement (the “Merger and Unit Purchase Agreement”) for the acquisition of 100% of the outstanding equity of Ka’ena Corporation and its subsidiaries, including, among others, Mint Mobile LLC (collectively, “Ka’ena”), for a maximum purchase price of $1.35 billion to be paid out 39% in cash and 61% in shares of T-Mobile common stock (the “Ka’ena Acquisition”). On March 13, 2024, we entered into Amendment No. 1 to the Merger and Unit Purchase Agreement, which amended, among other things, certain mechanics of the payment of the purchase

consideration for the Ka’ena Acquisition, which will result in a nominal increase in the percentage of cash compared to shares of T-Mobile common stock to be paid out as part of the total purchase price.

The purchase price is variable, dependent upon specified performance indicators of Ka’ena during certain periods before and after closing, and consists of an upfront payment at closing of the transaction, subject to certain agreed-upon working capital and other adjustments, and a variable earnout payable 24 months after closing of the transaction. Our estimate of the upfront payment is subject to Ka’ena’s underlying business performance and the timing of transaction close, and is currently estimated to be $1.2 billion, before working capital and other adjustments, which we currently estimate will result in a net upfront payment of approximately $950 million, with approximately 45% to be paid in cash. Subsequent to March 31, 2024, on April 25, 2024, we received all necessary regulatory approvals and the Ka’ena Acquisition is expected to close on May 1, 2024.

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Receivables and Related Allowance for Credit Losses

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

Receivables and Related Allowance for Credit Losses

Note 3 – Receivables and Related Allowance for Credit Losses

We maintain an allowance for credit losses by applying an expected credit loss model. Each period, management assesses the appropriateness of the level of allowance for credit losses by considering credit risk inherent within each portfolio segment as of the end of the period.

We consider a receivable past due when a customer has not paid us by the contractually specified payment due date. Account balances are written off against the allowance for credit losses if collection efforts are unsuccessful and the receivable balance is deemed uncollectible (customer default), based on factors such as customer credit ratings as well as the length of time the amounts are past due.

Our portfolio of receivables is comprised of two portfolio segments: accounts receivable and equipment installment plan (“EIP”) receivables.

Accounts Receivable Portfolio Segment

Accounts receivable balances are predominately comprised of amounts currently due from customers (e.g., for wireless communications services), device insurance administrators, wholesale partners, other carriers and third-party retail channels.

We estimate credit losses associated with our accounts receivable portfolio segment using an expected credit loss model, which utilizes an aging schedule methodology based on historical information and is adjusted for asset-specific considerations, current economic conditions and reasonable and supportable forecasts.

Our approach considers a number of factors, including our overall historical credit losses and payment experience, as well as current collection trends such as write-off frequency and severity. We also consider other qualitative factors such as current and forecasted macroeconomic conditions.

We consider the need to adjust our estimate of credit losses for reasonable and supportable forecasts of future macroeconomic conditions. To do so, we monitor external forecasts of changes in real U.S. gross domestic product and forecasts of consumer credit behavior for comparable credit exposures.

EIP Receivables Portfolio Segment

Based upon customer credit profiles at the time of customer origination, as well as subsequent credit performance, we classify the EIP receivables segment into two customer classes of “Prime” and “Subprime.” Prime customer receivables are those with lower credit risk, and Subprime customer receivables are those with higher credit risk. Customers may be required to make a down payment on their equipment purchases if their assessed credit risk exceeds established underwriting thresholds. In addition, certain customers within the Subprime category may be required to pay a deposit.

To determine a customer’s credit profile and assist in determining their credit class, we use a proprietary credit scoring model that measures the credit quality of a customer leveraging several factors, such as credit bureau information and consumer credit risk scores, as well as service and device plan characteristics.

EIP receivables had a combined weighted-average effective interest rate of 11.1% and 10.6% as of March 31, 2024, and December 31, 2023, respectively.

The following table summarizes the EIP receivables, including imputed discounts and related allowance for credit losses:

(in millions)	March 31, 2024		December 31, 2023
EIP receivables, gross	$	6,724	$	7,271
Unamortized imputed discount	(489)		(505)
EIP receivables, net of unamortized imputed discount	6,235		6,766
Allowance for credit losses	(268)		(268)
EIP receivables, net of allowance for credit losses and imputed discount	$	5,967	$	6,498
Classified on our condensed consolidated balance sheets as:
Equipment installment plan receivables, net of allowance for credit losses and imputed discount	$	4,059	$	4,456
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount	1,908		2,042
EIP receivables, net of allowance for credit losses and imputed discount	$	5,967	$	6,498

Many of our loss estimation techniques rely on delinquency-based models; therefore, delinquency is an important indicator of credit quality in the establishment of our allowance for credit losses for EIP receivables. We manage our EIP receivables portfolio segment using delinquency and customer credit class as key credit quality indicators.

The following table presents the amortized cost of our EIP receivables by delinquency status, customer credit class and year of origination as of March 31, 2024:

	Originated in 2024				Originated in 2023				Originated prior to 2023				Total EIP Receivables, Net of Unamortized Imputed Discount
(in millions)	Prime		Subprime		Prime		Subprime		Prime		Subprime		Prime		Subprime		Total
Current - 30 days past due	$	1,188	$	360	$	2,923	$	730	$	721	$	203	$	4,832	$	1,293	$	6,125
31 - 60 days past due	3		4		12		16		4		4		19		24		43
61 - 90 days past due	—		1		10		15		4		3		14		19		33
More than 90 days past due	—		—		9		15		6		4		15		19		34
EIP receivables, net of unamortized imputed discount	$	1,191	$	365	$	2,954	$	776	$	735	$	214	$	4,880	$	1,355	$	6,235

We estimate credit losses on our EIP receivables segment by applying an expected credit loss model, which relies on historical loss data adjusted for current conditions to calculate default probabilities or an estimate for the frequency of customer default. Our assessment of default probabilities or frequency includes receivables delinquency status, historical loss experience, how long the receivables have been outstanding and customer credit ratings, as well as customer tenure. We multiply these estimated default probabilities by our estimated loss given default, which is the estimated amount of default or the severity of loss.

As we do for our accounts receivable portfolio segment, we consider the need to adjust our estimate of credit losses on EIP receivables for reasonable and supportable forecasts of economic conditions through monitoring external forecasts and periodic internal statistical analyses.

The following table presents write-offs of our EIP receivables by year of origination for the three months ended March 31, 2024:

(in millions)	Originated in 2024		Originated in 2023		Originated prior to 2023		Total Write-offs
Write-offs	$	2	$	114	$	34	$	150

Activity for the three months ended March 31, 2024 and 2023, in the allowance for credit losses and unamortized imputed discount balances for the accounts receivable and EIP receivables segments were as follows:

	March 31, 2024						March 31, 2023
(in millions)	Accounts Receivable Allowance		EIP Receivables Allowance		Total		Accounts Receivable Allowance		EIP Receivables Allowance		Total
Allowance for credit losses and imputed discount, beginning of period	$	161	$	773	$	934	$	167	$	811	$	978
Bad debt expense	132		150		282		107		115		222
Write-offs	(132)		(150)		(282)		(122)		(140)		(262)
Change in imputed discount on short-term and long-term EIP receivables	N/A		31		31		N/A		54		54
Impact on the imputed discount from sales of EIP receivables	N/A		(47)		(47)		N/A		(54)		(54)
Allowance for credit losses and imputed discount, end of period	$	161	$	757	$	918	$	152	$	786	$	938

Off-Balance-Sheet Credit Exposures

We do not have material off-balance-sheet credit exposures as of March 31, 2024. In connection with the sales of certain service accounts receivable and EIP receivables pursuant to the sale arrangements, we have deferred purchase price assets included on our Condensed Consolidated Balance Sheets measured at fair value that are based on a discounted cash flow model using Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. See Note 4 – Sales of Certain Receivables for further information.

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Sales of Certain Receivables

3 Months Ended

Mar. 31, 2024

Transfers and Servicing [Abstract]

Sales of Certain Receivables

Note 4 – Sales of Certain Receivables

We regularly enter into transactions to sell certain service accounts receivable and EIP receivables. The transactions, including our continuing involvement with the sold receivables and the respective impacts to our condensed consolidated financial statements, are described below.

Sales of EIP Receivables

Overview of the Transaction

In 2015, we entered into an arrangement to sell certain EIP receivables on a revolving basis (the “EIP Sale Arrangement”), which has been revised and extended from time to time. As of both March 31, 2024, and December 31, 2023, the EIP Sale Arrangement provided funding of $1.3 billion.

In connection with this EIP Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “EIP BRE”). We consolidate the EIP BRE under the VIE model.

The following table summarizes the carrying amounts and classification of assets, which consist primarily of the deferred purchase price, included on our Condensed Consolidated Balance Sheets with respect to the EIP BRE:

(in millions)	March 31, 2024		December 31, 2023
Other current assets	$	330	$	348
Other assets	95		103

Sales of Service Accounts Receivable

Overview of the Transaction

In 2014, we entered into an arrangement to sell certain service accounts receivable on a revolving basis (the “Service Receivable Sale Arrangement”). On February 27, 2024, we extended the scheduled expiration date of the Service Receivable Sale Arrangement to February 25, 2025. As of both March 31, 2024, and December 31, 2023, the Service Receivable Sale Arrangement provided funding of $775 million.

In connection with the Service Receivable Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity, to sell service accounts receivable (the “Service BRE”). We consolidate the Service BRE under the VIE model.

The following table summarizes the carrying amounts and classification of assets, which consist primarily of the deferred purchase price, and liabilities included on our Condensed Consolidated Balance Sheets with respect to the Service BRE:

(in millions)	March 31, 2024		December 31, 2023
Other current assets	$	164	$	209
Other current liabilities	423		373

Sales of Receivables

The following table summarizes the impact of the sale of certain service accounts receivable and EIP receivables on our Condensed Consolidated Balance Sheets:

(in millions)	March 31, 2024		December 31, 2023
Derecognized net service accounts receivable and EIP receivables	$	2,249	$	2,388
Other current assets	494		557
of which, deferred purchase price	491		555
Other long-term assets	95		103
of which, deferred purchase price	95		103
Other current liabilities	423		373
Net cash proceeds since inception	1,554		1,583
Of which:
Change in net cash proceeds during the year-to-date period	(29)		(114)
Net cash proceeds funded by reinvested collections	1,583		1,697

At inception, we elected to measure the deferred purchase price at fair value with changes in fair value included in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income. The fair value of the deferred purchase price is determined based on a discounted cash flow model which uses primarily Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. As of March 31, 2024, and December 31, 2023, our deferred purchase price related to the sales of service accounts receivable and EIP receivables was $586 million and $658 million, respectively.

We recognized losses from sales of receivables, including changes in fair value of the deferred purchase price, of $21 million and $38 million for the three months ended March 31, 2024 and 2023, respectively, in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income.

Continuing Involvement

Pursuant to the sale arrangements described above, we have continuing involvement with the service accounts receivable and EIP receivables we sell as we service the receivables, are required to repurchase certain receivables, including ineligible receivables, aged receivables and receivables where a write-off is imminent, and may be responsible for absorbing credit losses through reduced collections on our deferred purchase price assets. We continue to service the customers and their related receivables, including facilitating customer payment collection, in exchange for a monthly servicing fee. As the receivables are sold on a revolving basis, the customer payment collections on sold receivables may be reinvested in new receivable sales. At the direction of the purchasers of the sold receivables, we apply the same policies and procedures while servicing the sold receivables as we apply to our owned receivables, and we continue to maintain normal relationships with our customers.

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Spectrum License Transactions

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Spectrum License Transactions

Note 5 – Spectrum License Transactions

The following table summarizes our spectrum license activity for the three months ended March 31, 2024:

(in millions)	2024
Spectrum licenses, beginning of year	$	96,707
Spectrum license acquisitions	411
Spectrum licenses transferred to held for sale	(17)
Costs to clear spectrum	53
Spectrum licenses, end of period	$	97,154

Cash payments to acquire spectrum licenses and payments for costs to clear spectrum are included in Purchases of spectrum licenses and other intangible assets, including deposits, on our Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2024.

Spectrum Transactions

In September 2022, the Federal Communications Commission (“FCC”) announced that we were the winning bidder of 7,156 licenses in Auction 108 (2.5 GHz spectrum) for an aggregate price of $304 million. At inception of Auction 108 in June 2022, we deposited $65 million. We paid the FCC the remaining $239 million for the licenses won in the auction in September 2022. On February 29, 2024, the FCC issued to us the licenses won in Auction 108, and substantially all of these licenses were deployed in March 2024. The licenses are included in Spectrum licenses on our Condensed Consolidated Balance Sheets as of March 31, 2024.

License Purchase Agreements

DISH Network Corporation

On July 1, 2020, we and DISH Network Corporation (“DISH”) entered into a license purchase agreement (the “DISH License Purchase Agreement”) pursuant to which DISH agreed to purchase certain 800 MHz spectrum licenses for a total of approximately $3.6 billion. The closing of the sale of spectrum under the DISH License Purchase Agreement remains subject to FCC approval. On October 15, 2023, we and DISH entered into an amendment (the “LPA Amendment”) to the DISH License Purchase Agreement pursuant to which, among other things, the parties agreed that (1) DISH will pay us a $100 million non-refundable extension fee (in lieu of the approximately $72 million termination fee that had previously been agreed to), (2) the closing for the purchase of the spectrum licenses by DISH will occur no later than April 1, 2024, (3) if DISH has not purchased the spectrum licenses by such date for any reason (including failure to receive the required FCC approval prior to such date), then the DISH License Purchase Agreement will automatically terminate, and we will retain the $100 million extension fee, (4) if DISH does purchase the spectrum by April 1, 2024, the $100 million extension fee will be credited against the $3.6 billion purchase price, and (5) we are permitted to commence auction of the spectrum prior to April 1, 2024 at our discretion (and subject to DISH’s purchase right). The LPA Amendment was approved by the Court and became effective on October 23, 2023. On October 25, 2023, we received a payment of $100 million from DISH for the extension fee and recorded a corresponding liability within Other current liabilities on our Condensed Consolidated Balance Sheets.

Subsequent to March 31, 2024, DISH did not purchase the 800 MHz spectrum by April 1, 2024. As such, we will recognize a gain for the $100 million extension fee previously paid by DISH in the second quarter of 2024 within Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income and relieve the liability that was initially recorded upon receipt of the payment. Additionally, we have commenced an auction process for the disposition of the spectrum as required under the final judgment agreed to by us, Deutsche Telekom AG (“DT”), Sprint LLC, SoftBank Group Corp. (“SoftBank”) and DISH with the U.S. District Court for the District of Columbia, which was approved by the Court on April 1, 2020. If the specified minimum price of $3.6 billion is not met in the auction, we would be relieved of the obligation to sell the licenses.

Channel 51 License Co LLC and LB License Co, LLC

On August 8, 2022, we, Channel 51 License Co LLC and LB License Co, LLC (together with Channel 51 License Co LLC, the “Sellers”) entered into License Purchase Agreements pursuant to which we will acquire spectrum in the 600 MHz band from the Sellers in exchange for total cash consideration of $3.5 billion. The licenses will be acquired without any associated networks and are currently being utilized by us through exclusive leasing arrangements with the Sellers.

On March 30, 2023, we and the Sellers entered into Amended and Restated License Purchase Agreements pursuant to which we and the Sellers agreed to separate the transaction into two tranches of licenses, with the closings on the acquisitions of certain licenses in Chicago, Dallas and New Orleans being deferred in order to potentially expedite the regulatory approval process for the remainder of the licenses. Subsequently, on August 25, 2023, we and the Sellers entered into Amendments No. 1 to the Amended and Restated License Purchase Agreements, which deferred the closings of certain additional licenses in Chicago and Dallas into the second closing tranche. Together, the licenses with closings deferred into the second closing tranche represent $1.1 billion of the aggregate $3.5 billion cash consideration. The licenses being acquired by us, and the total consideration being paid for the licenses, remain the same under the original License Purchase Agreements and subsequent amendments.

The FCC approved the purchase of the first tranche on December 29, 2023, and we expect the closing of the first tranche to occur in the second quarter of 2024, with the associated cash payment expected to occur in the third quarter of 2024. We anticipate that the second closing (on the deferred licenses) will occur in late 2024 or early 2025.

The parties have agreed that each of the closings will occur within 180 days after the receipt of the applicable required regulatory approvals, and payment of each portion of the aggregate $3.5 billion purchase price will occur no later than 40 days after the date of each respective closing.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note 6 – Fair Value Measurements

The carrying values of Cash and cash equivalents, Accounts receivable and Accounts payable and accrued liabilities approximate fair value due to the short-term maturities of these instruments. The carrying values of EIP receivables approximate fair value as the receivables are recorded at their present value using an imputed interest rate.

Derivative Financial Instruments

Periodically, we use derivatives to manage exposure to market risk, such as interest rate risk. We designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship to help minimize significant, unplanned fluctuations in cash flows or fair values caused by designated market risks, such as interest rate volatility. We do not use derivatives for trading or speculative purposes.

Cash flows associated with qualifying hedge derivative instruments are presented in the same category on our Condensed Consolidated Statements of Cash Flows as the item being hedged. For fair value hedges, the change in the fair value of the derivative instruments is recognized in earnings through the same income statement line item as the change in the fair value of the hedged item. For cash flow hedges, the change in the fair value of the derivative instruments is reported in Other comprehensive income and recognized in earnings when the hedged item is recognized in earnings, again, through the same income statement line item.

We did not have any significant derivative instruments outstanding as of March 31, 2024, and December 31, 2023.

Interest Rate Lock Derivatives

In April 2020, we terminated our interest rate lock derivatives entered into in October 2018.

Aggregate changes in the fair value of the interest rate lock derivatives, net of tax and amortization, of $1.1 billion are presented in Accumulated other comprehensive loss on our Condensed Consolidated Balance Sheets as of both March 31, 2024, and December 31, 2023.

For the three months ended March 31, 2024 and 2023, $57 million and $53 million, respectively, were amortized from Accumulated other comprehensive loss into Interest expense, net, on our Condensed Consolidated Statements of Comprehensive Income. We expect to amortize $241 million of the Accumulated other comprehensive loss associated with the derivatives into Interest expense, net, over the 12 months ending March 31, 2025.

Deferred Purchase Price Assets

In connection with the sales of certain service and EIP accounts receivable pursuant to the sale arrangements, we have deferred purchase price assets measured at fair value that are based on a discounted cash flow model using unobservable Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. See Note 4 – Sales of Certain Receivables for further information.

The carrying amounts of our deferred purchase price assets, which are measured at fair value on a recurring basis and are included on our Condensed Consolidated Balance Sheets, were $586 million and $658 million as of March 31, 2024, and December 31, 2023, respectively.

Debt

The fair value of our Senior Notes and spectrum-backed Senior Secured Notes to third parties was determined based on quoted market prices in active markets, and therefore were classified as Level 1 within the fair value hierarchy. The fair value of our Senior Notes to affiliates was determined based on a discounted cash flow approach using market interest rates of instruments with similar terms and maturities and an estimate for our standalone credit risk. Accordingly, our Senior Notes to affiliates were classified as Level 2 within the fair value hierarchy. The fair value of our asset-backed notes (“ABS Notes”) was primarily based on quoted prices in inactive markets for identical instruments and observable changes in market interest rates, both of which are Level 2 inputs. Accordingly, our ABS Notes were classified as Level 2 within the fair value hierarchy.

Although we have determined the estimated fair values using available market information and commonly accepted valuation methodologies, judgment was required in interpreting market data to develop fair value estimates for the Senior Notes to affiliates and ABS Notes. The fair value estimates were based on information available as of March 31, 2024, and December 31, 2023. As such, our estimates are not necessarily indicative of the amount we could realize in a current market exchange.

The carrying amounts and fair values of our short-term and long-term debt included on our Condensed Consolidated Balance Sheets were as follows:

(in millions)	Level within the Fair Value Hierarchy	March 31, 2024				December 31, 2023
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
Liabilities:
Senior Notes to third parties	1	$	73,421	$	67,914	$	70,493	$	65,962
Senior Notes to affiliates	2	1,496		1,464		1,496		1,499
Senior Secured Notes to third parties	1	2,050		1,994		2,281		2,207
ABS Notes to third parties	2	1,246		1,244		748		748

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Debt

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Debt

Note 7 – Debt

The following table sets forth the debt balances and activity as of, and for the three months ended, March 31, 2024:

(in millions)	December 31, 2023		Proceeds from Issuances and Borrowings (1)		Repayments		Reclassifications (1)		Other (2)		March 31, 2024
Short-term debt	$	3,619	$	—	$	(223)	$	1,983	$	(23)	$	5,356
Long-term debt	69,903		3,473		—		(1,983)		(32)		71,361
Total debt to third parties	73,522		3,473		(223)		—		(55)		76,717
Long-term debt to affiliates	1,496		—		—		—		—		1,496
Total debt	$	75,018	$	3,473	$	(223)	$	—	$	(55)	$	78,213

(1)Issuances and borrowings and reclassifications are recorded net of accrued or paid issuance costs and discounts.

(2)Other includes the amortization of premiums, discounts, debt issuance costs and consent fees.

Our effective interest rate, excluding the impact of derivatives and capitalized interest, was approximately 4.1% and 4.0% on weighted-average debt outstanding of $77.4 billion and $73.4 billion for the three months ended March 31, 2024 and 2023, respectively. The weighted-average debt outstanding was calculated by applying an average of the monthly ending balances of total short-term and long-term debt to third parties and short-term and long-term debt to affiliates, net of unamortized premiums, discounts, debt issuance costs and consent fees.

Issuances and Borrowings

During the three months ended March 31, 2024, we issued the following Senior Notes:

(in millions)	Principal Issuances		Discounts and Issuance Costs, Net		Net Proceeds from Issuance of Long-Term Debt		Issue Date
4.850% Senior Notes due 2029	$	1,000	$	(6)	$	994	January 12, 2024
5.150% Senior Notes due 2034	1,250		(11)		1,239		January 12, 2024
5.500% Senior Notes due 2055	750		(7)		743		January 12, 2024
Total of Senior Notes issued	$	3,000	$	(24)	$	2,976
5.050% Class A Senior ABS Notes due 2029	$	500	$	(3)	$	497	February 14, 2024
Total of ABS Notes issued	$	500	$	(3)	$	497

Note Repayments

During the three months ended March 31, 2024, we made the following repayments:

(in millions)	Principal Amount		Repayment Date
4.738% Secured Series 2018-1 A-1 Notes due 2025	$	131	Various
5.152% Series 2018-1 A-2 Notes due 2028	92		Various
Total Repayments	$	223

Asset-backed Notes

On February 14, 2024, we issued $500 million of 5.050% Class A Senior ABS Notes to third parties in a private placement transaction. These ABS Notes are secured by $667 million of gross EIP receivables and future collections on such receivables. Net proceeds of $497 million from these ABS Notes are presented in Proceeds from issuance of long-term debt on our Condensed Consolidated Statements of Cash Flows in the three months ended March 31, 2024.

As of March 31, 2024, $1.3 billion of our ABS Notes were secured in total by $1.7 billion of gross EIP receivables and future collections on such receivables. Our ABS Notes and the assets securing this debt are included on our Condensed Consolidated Balance Sheets.

The expected maturities of our ABS Notes as of March 31, 2024, were as follows:

(in millions)	Expected Maturities
2024	$	198
2025	552
2026	459
2027	41
Total	$	1,250

Variable Interest Entities

In connection with our ABS Notes issuances, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “ABS BRE”), and a trust (the “ABS Trust” and together with the ABS BRE, the “ABS Entities”), in which the ABS BRE holds a residual interest. Each of the ABS Entities meet the definition of a VIE for which we have determined that we are the primary beneficiary, as we have the power to direct the activities of the ABS Entities that most significantly impact their performance. Accordingly, we include the balances and results of operations of the ABS Entities in our condensed consolidated financial statements.

The following table summarizes the carrying amounts and classification of assets and liabilities included in our Condensed Consolidated Balance Sheets with respect to the ABS Entities:

(in millions)	March 31, 2024		December 31, 2023
Assets
Equipment installment plan receivables, net	$	1,123	$	739
Equipment installment plan receivables due after one year, net	376		168
Other current assets	154		101
Liabilities
Accounts payable and accrued liabilities	$	2	$	1
Short-term debt	413		198
Long-term debt	833		550

See Note 3 – Receivables and Related Allowance for Credit Losses for additional information on the EIP receivables used to secure the ABS Notes.

Restricted Cash

Certain provisions of our debt agreements require us to maintain specified cash collateral balances. Amounts associated with these balances are considered to be restricted cash. See Note 13 - Additional Financial Information for our reconciliation of Cash and cash equivalents, including restricted cash.

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Tower Obligations

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Tower Obligations

Note 8 – Tower Obligations

Existing CCI Tower Lease Arrangements

In 2012, we conveyed to Crown Castle International Corp. (“CCI”) the exclusive right to manage and operate approximately 6,200 tower sites (“CCI Lease Sites”) via a master prepaid lease with site lease terms ranging from 23 to 37 years. CCI has fixed-price purchase options for the CCI Lease Sites totaling approximately $2.0 billion, exercisable annually on a per-tranche basis at the end of the lease term during the period from December 31, 2035, through December 31, 2049. If CCI exercises its purchase option for any tranche, it must purchase all the towers in the tranche. We lease back a portion of the space at certain tower sites.

Assets and liabilities associated with the operation of the tower sites were transferred to special purpose entities (“SPEs”). Assets included ground lease agreements or deeds for the land on which the towers are situated, the towers themselves and existing subleasing agreements with other mobile network operator tenants that lease space at the tower sites. Liabilities included the obligation to pay ground lease rentals, property taxes and other executory costs.

We determined the SPEs containing the CCI Lease Sites (“Lease Site SPEs”) are VIEs as they lack sufficient equity to finance their activities. We have a variable interest in the Lease Site SPEs but are not the primary beneficiary as we lack the power to direct the activities that most significantly impact the Lease Site SPEs’ economic performance. These activities include managing tenants and underlying ground leases, performing repair and maintenance on the towers, the obligation to absorb expected losses and the right to receive the expected future residual returns from the purchase option to acquire the CCI Lease Sites. As we determined that we are not the primary beneficiary and do not have a controlling financial interest in the Lease Site SPEs, the Lease Site SPEs are not included on our condensed consolidated financial statements.

However, we also considered if this arrangement resulted in the sale of the CCI Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the CCI Lease Sites tower assets remained on our Condensed Consolidated Balance Sheets. We recorded long-term financial obligations in the amount of the net proceeds received and recognize interest on the tower obligations. The tower obligations are increased by interest expense and amortized through contractual leaseback payments made by us to CCI and through net cash flows generated and retained by CCI from the operation of the tower sites.

Acquired CCI Tower Lease Arrangements

Prior to our merger with Sprint (the “Merger”), Sprint entered into a lease-out and leaseback arrangement with Global Signal Inc., a third party that was subsequently acquired by CCI, that conveyed to CCI the exclusive right to manage and operate approximately 6,400 tower sites (“Master Lease Sites”) via a master prepaid lease. These agreements were assumed upon the

close of the Merger, at which point the remaining term of the lease-out was approximately 17 years with no renewal options. CCI has a fixed price purchase option for all (but not less than all) of the leased or subleased sites for approximately $2.3 billion, exercisable one year prior to the expiration of the agreement and ending 120 days prior to the expiration of the agreement. We lease back a portion of the space at certain tower sites.

We considered if this arrangement resulted in the sale of the Master Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the Master Lease Sites tower assets remained on our Condensed Consolidated Balance Sheets.

We recognize interest expense on the tower obligations. The tower obligations are increased by the interest expense and amortized through contractual leaseback payments made by us to CCI. The tower assets are reported in Property and equipment, net on our Condensed Consolidated Balance Sheets and are depreciated to their estimated residual values over the expected useful life of the towers, which is 20 years.

Leaseback Arrangement

On January 3, 2022, we entered into an agreement (the “Crown Agreement”) with CCI. The Crown Agreement extends the current term of the leasebacks by up to 12 years and modifies the leaseback payments for both the Existing CCI Tower Lease Arrangements and the Acquired CCI Tower Lease Arrangements. As a result of the Crown Agreement, there was an increase in our financing obligation as of the effective date of the Crown Agreement of approximately $1.2 billion, with a corresponding decrease to Other long-term liabilities associated with unfavorable contract terms. The modification resulted in a revised interest rate under the effective interest method for the tower obligations: 11.6% for the Existing CCI Tower Lease Arrangements and 5.3% for the Acquired CCI Tower Lease Arrangements. There were no changes made to either of our master prepaid leases with CCI.

The following table summarizes the balances associated with both of the tower arrangements on our Condensed Consolidated Balance Sheets:

(in millions)	March 31, 2024		December 31, 2023
Property and equipment, net	$	2,182	$	2,220
Tower obligations	3,751		3,777
Other long-term liabilities	554		554

Future minimum payments related to the tower obligations are approximately $421 million for the 12-month period ending March 31, 2025, $774 million in total for both of the 12-month periods ending March 31, 2026 and 2027, $816 million in total for both of the 12-month periods ending March 31, 2028 and 2029, and $4.0 billion in total thereafter.

We are contingently liable for future ground lease payments through the remaining term of the CCI Lease Sites and the Master Lease Sites. These contingent obligations are not included in Operating lease liabilities, as any amount due is contractually owed by CCI based on the subleasing arrangement. Under the arrangement, we remain primarily liable for ground lease payments on approximately 900 sites and have included lease liabilities of $241 million in our Operating lease liabilities as of March 31, 2024.

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Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Note 9 – Revenue from Contracts with Customers

Disaggregation of Revenue

We provide wireless communications services to three primary categories of customers:

•Postpaid customers generally include customers who are qualified to pay after receiving wireless communications services utilizing phones, High Speed Internet, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT);

•Prepaid customers generally include customers who pay for wireless communications services in advance; and

•Wholesale customers include Machine-to-Machine and Mobile Virtual Network Operator customers that operate on our network but are managed by wholesale partners.

Postpaid service revenues, including postpaid phone revenues and postpaid other revenues, were as follows:

	Three Months Ended March 31,
(in millions)	2024		2023
Postpaid service revenues
Postpaid phone revenues	$	11,145	$	10,652
Postpaid other revenues	1,486		1,210
Total postpaid service revenues	$	12,631	$	11,862

We operate as a single operating segment. The balances presented in each revenue line item on our Condensed Consolidated Statements of Comprehensive Income represent categories of revenue from contracts with customers disaggregated by type of product and service. Postpaid and prepaid service revenues also include revenues earned for providing premium services to customers, such as device insurance services. Revenue generated from the lease of mobile communication devices is included in Equipment revenues on our Condensed Consolidated Statements of Comprehensive Income.

Contract Balances

The contract asset and contract liability balances from contracts with customers as of March 31, 2024, and December 31, 2023, were as follows:

(in millions)	Contract Assets		Contract Liabilities
Balance as of December 31, 2023	$	607	$	812
Balance as of March 31, 2024	548		836
Change	$	(59)	$	24

Contract assets primarily represent revenue recognized for equipment sales with promotional bill credits offered to customers that are paid over time and are contingent on the customer maintaining a service contract.

The change in the contract asset balance includes customer activity related to new promotions, offset by billings on existing contracts and impairment, which is recognized as bad debt expense. The current portion of our contract assets of approximately $449 million and $495 million as of March 31, 2024, and December 31, 2023, respectively, was included in Other current assets on our Condensed Consolidated Balance Sheets.

Contract liabilities are recorded when fees are collected, or we have an unconditional right to consideration (a receivable) in advance of delivery of goods or services. Changes in contract liabilities are primarily related to the activity of prepaid customers. Contract liabilities are primarily included in Deferred revenue on our Condensed Consolidated Balance Sheets.

Revenues for the three months ended March 31, 2024 and 2023 include the following:

	Three Months Ended March 31,
(in millions)	2024		2023
Amounts included in the beginning of year contract liability balance	$	698	$	667

Remaining Performance Obligations

As of March 31, 2024, the aggregate amount of transaction price allocated to remaining service performance obligations for postpaid contracts with subsidized devices and promotional bill credits that result in an extended service contract is $1.3 billion. We expect to recognize revenue as the service is provided on these postpaid contracts over an extended contract term of 24 months from the time of origination.

Information about remaining performance obligations that are part of a contract that has an original expected duration of one year or less has been excluded from the above, which primarily consists of monthly service contracts.

Certain of our wholesale, roaming and service contracts include variable consideration based on usage and performance. This variable consideration has been excluded from the disclosure of remaining performance obligations. As of March 31, 2024, the aggregate amount of the contractual minimum consideration for wholesale, roaming and service contracts is $1.3 billion, $1.6 billion and $2.8 billion for the remainder of 2024, 2025, and 2026 and beyond, respectively. These contracts have a remaining duration ranging from less than one year to eight years.

Contract Costs

The balance of deferred incremental costs to obtain contracts with customers was $2.1 billion as of both March 31, 2024, and December 31, 2023, and is included in Other assets on our Condensed Consolidated Balance Sheets. Deferred contract costs incurred to obtain postpaid service contracts are amortized over a period of 24 months. The amortization period is monitored to reflect any significant change in assumptions. Amortization of deferred contract costs included in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income were $489 million and $422 million for the three months ended March 31, 2024 and 2023, respectively.

The deferred contract cost asset is assessed for impairment on a periodic basis. There were no impairment losses recognized on deferred contract cost assets for the three months ended March 31, 2024 and 2023.

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Stockholder Return Program

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Stockholder Return Program

Note 10 – Stockholder Return Program

2023-2024 Stockholder Return Program

On September 6, 2023, our Board of Directors authorized our 2023-2024 Stockholder Return Program of up to $19.0 billion that will run from October 1, 2023, through December 31, 2024 (the “2023-2024 Stockholder Return Program”). The 2023-2024 Stockholder Return Program consists of repurchases of shares of our common stock and the payment of cash dividends.

On January 24, 2024, our Board of Directors declared a cash dividend of $0.65 per share on our issued and outstanding common stock, which was paid on March 14, 2024, to stockholders of record as of the close of business on March 1, 2024.

On March 15, 2024, our Board of Directors declared a cash dividend of $0.65 per share on our issued and outstanding common stock, which is payable on June 13, 2024, to stockholders of record as of the close of business on May 31, 2024.

During the three months ended March 31, 2024, we paid an aggregate of $769 million in cash dividends to our stockholders, which was presented within Net cash used in financing activities on our Condensed Consolidated Statements of Cash Flows, of which $388 million was paid to DT. As of March 31, 2024, $756 million for dividends payable is presented within Other current liabilities on our Condensed Consolidated Balance Sheets, of which $386 million is payable to DT.

During the three months ended March 31, 2024, we repurchased 21,933,790 shares of our common stock at an average price per share of $162.69 for a total purchase price of $3.6 billion under the 2023-2024 Stockholder Return Program. All shares repurchased during the three months ended March 31, 2024, were purchased at market price. As of March 31, 2024, we had up to $11.7 billion remaining under the 2023-2024 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2024. The next quarterly cash dividend will be paid on June 13, 2024.

Subsequent to March 31, 2024, from April 1, 2024, through April 19, 2024, we repurchased 5,427,946 shares of our common stock at an average price per share of $160.97 for a total purchase price of $874 million. As of April 19, 2024, we had up to $10.8 billion remaining under the 2023-2024 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2024.

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Earnings Per Share

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Earnings Per Share

Note 11 – Earnings Per Share

The computation of basic and diluted earnings per share was as follows:

	Three Months Ended March 31,
(in millions, except shares and per share amounts)	2024		2023
Net income	$	2,374	$	1,940
Weighted-average shares outstanding – basic	1,185,298,497		1,219,608,362
Effect of dilutive securities:
Outstanding stock options, unvested stock awards	3,793,522		4,996,336
Weighted-average shares outstanding – diluted	1,189,092,019		1,224,604,698
Earnings per share – basic	$	2.00	$	1.59
Earnings per share – diluted	$	2.00	$	1.58
Potentially dilutive securities:
Outstanding stock options and unvested stock awards	6		98,175
SoftBank contingent consideration (1)	—		48,751,557

(1)     Represents the weighted-average number of shares (“SoftBank Specified Shares”) that were contingently issuable from the Merger date of April 1, 2020, pursuant to a letter agreement dated February 20, 2020, between T-Mobile, SoftBank and DT (the “Letter Agreement”). The SoftBank Specified Shares were determined to be contingent consideration for the Merger and was not dilutive until the defined volume-weighted average price per share was reached (the “Threshold Price”). As of the close of trading on December 22, 2023, the Threshold Price was reached. On December 28, 2023, the Company issued the SoftBank Specified Shares to SoftBank in accordance with the Letter Agreement.

As of March 31, 2024, we had authorized 100 million shares of preferred stock, with a par value of $0.00001 per share. There was no preferred stock outstanding as of March 31, 2024 and 2023. Potentially dilutive securities were not included in the computation of diluted earnings per share if to do so would have been anti-dilutive.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 12 – Commitments and Contingencies

Merger Commitments

In connection with the regulatory proceedings and approvals of the Merger pursuant to the Business Combination Agreement with Sprint and the other parties named therein (as amended, the “Business Combination Agreement”) and the other transactions contemplated by the Business Combination Agreement (collectively, the “Transactions”), we have commitments and other obligations to various state and federal agencies and certain nongovernmental organizations, including pursuant to the Consent Decree agreed to by us, DT, Sprint, SoftBank and DISH and entered by the U.S. District Court for the District of Columbia, and the FCC’s memorandum opinion and order approving our applications for approval of the Merger. These commitments and obligations include, among other things, extensive 5G network build-out commitments, obligations to deliver high-speed wireless services to the vast majority of Americans, including Americans residing in rural areas, and the marketing of an in-home broadband product where spectrum capacity is available. Other commitments relate to national security, pricing, service, employment and support of diversity initiatives. Many of the commitments specify time frames for compliance and reporting. Failure to fulfill our obligations and commitments in a timely manner could result in substantial fines, penalties, or other legal and administrative actions.

Contingencies and Litigation

Litigation and Regulatory Matters

We are involved in various lawsuits and disputes, claims, government agency investigations and enforcement actions, and other proceedings (“Litigation and Regulatory Matters”) that arise in the ordinary course of business, which include claims of patent infringement (most of which are asserted by non-practicing entities primarily seeking monetary damages), class actions, and proceedings to enforce FCC or other government agency rules and regulations. Those Litigation and Regulatory Matters are at various stages, and some of them may proceed to trial, arbitration, hearing, or other adjudication that could result in fines, penalties, or awards of monetary or injunctive relief in the coming 12 months if they are not otherwise resolved. We have established an accrual with respect to certain of these matters, where appropriate. The accruals are reflected on our condensed consolidated financial statements, but they are not considered to be, individually or in the aggregate, material. An accrual is established when we believe it is both probable that a loss has been incurred and an amount can be reasonably estimated. For

other matters, where we have not determined that a loss is probable or because the amount of loss cannot be reasonably estimated, we have not recorded an accrual due to various factors typical in contested proceedings, including, but not limited to, uncertainty concerning legal theories and their resolution by courts or regulators, uncertain damage theories and demands, and a less than fully developed factual record. For Litigation and Regulatory Matters that may result in a contingent gain, we recognize such gains on our condensed consolidated financial statements when the gain is realized or realizable. We recognize legal costs expected to be incurred in connection with Litigation and Regulatory Matters as they are incurred. Except as otherwise specified below, we do not expect that the ultimate resolution of these Litigation and Regulatory Matters, individually or in the aggregate, will have a material adverse effect on our financial position, but we note that an unfavorable outcome of some or all of the specific matters identified below or other matters that we are or may become involved in could have a material adverse impact on results of operations or cash flows for a particular period. This assessment is based on our current understanding of relevant facts and circumstances. As such, our view of these matters is subject to inherent uncertainties and may change in the future.

On February 28, 2020, we received a Notice of Apparent Liability for Forfeiture and Admonishment from the FCC, which proposed a penalty against us for allegedly violating section 222 of the Communications Act and the FCC’s regulations governing the privacy of customer information. We have included an accrual for the settlement amount that we believe to be probable in Accounts payable and accrued liabilities on our Condensed Consolidated Balance Sheets as of March 31, 2024.

On April 1, 2020, in connection with the closing of the Merger, we assumed the contingencies and litigation matters of Sprint. Those matters include a wide variety of disputes, claims, government agency investigations and enforcement actions, and other proceedings. These matters include, among other things, certain ongoing FCC and state government agency investigations into Sprint’s Lifeline program. In September 2019, Sprint notified the FCC that it had claimed monthly subsidies for serving subscribers, even though these subscribers may not have met usage requirements under Sprint's usage policy for the Lifeline program, due to an inadvertent coding issue in the system used to identify qualifying subscriber usage that occurred in July 2017 while the system was being updated. Sprint has made a number of payments to reimburse the federal government and certain states for excess subsidy payments.

We note that, pursuant to Amendment No. 2, dated as of February 20, 2020, to the Business Combination Agreement, dated as of April 29, 2018, by and among the Company, Sprint and the other parties named therein, SoftBank agreed to indemnify us against certain specified matters and losses, including those relating to the Lifeline matters described above. Resolution of these matters could require us to make additional reimbursements and pay additional fines and penalties, which we do not expect to have a significant impact on our financial results. We expect that any additional liabilities related to these indemnified matters would be indemnified and reimbursed by SoftBank.

On June 1, 2021, a putative shareholder class action and derivative lawsuit was filed in the Delaware Court of Chancery, Dinkevich v. Deutsche Telekom AG, et al., Case No. C.A. No. 2021-0479, against DT, SoftBank and certain of our current and former officers and directors, asserting breach of fiduciary duty claims relating to the repricing amendment to the Business Combination Agreement and to SoftBank’s monetization of its T-Mobile shares. We are also named as a nominal defendant in the case. We are unable to predict the potential outcome of these claims.

On August 12, 2021, we became aware of a cybersecurity issue involving unauthorized access to T-Mobile’s systems (the “August 2021 cyberattack”). We immediately began an investigation and engaged cybersecurity experts to assist with the assessment of the incident and to help determine what data was impacted. Our investigation uncovered that the perpetrator had illegally gained access to certain areas of our systems on or about March 18, 2021, but only gained access to and took data of current, former, and prospective customers beginning on or about August 3, 2021. With the assistance of our outside cybersecurity experts, we located and closed the unauthorized access to our systems and identified current, former and prospective customers whose information was impacted and notified them, consistent with state and federal requirements. We also undertook a number of other measures to demonstrate our continued support and commitment to data privacy and protection. We also coordinated with law enforcement. Our forensic investigation is complete, and we believe we have a full view of the data compromised.

As a result of the August 2021 cyberattack, we have become subject to numerous lawsuits, including mass arbitration claims and multiple class action lawsuits that have been filed in numerous jurisdictions seeking, among other things, unspecified monetary damages, costs and attorneys’ fees arising out of the August 2021 cyberattack. In December 2021, the Judicial Panel on Multidistrict Litigation consolidated the federal class action lawsuits in the U.S. District Court for the Western District of Missouri under the caption In re: T-Mobile Customer Data Security Breach Litigation, Case No. 21-md-3019-BCW. On July 22, 2022, we entered into an agreement to settle the lawsuit. On June 29, 2023, the Court issued an order granting final approval of the settlement, which is subject to potential appeals. Under the terms of the settlement, we would pay an aggregate of $350 million to fund claims submitted by class members, the legal fees of plaintiffs’ counsel and the costs of administering the settlement. We also committed to an aggregate incremental spend of $150 million for data security and related technology in

2022 and 2023. We previously paid $35 million for claims administration purposes. On July 31, 2023, a class member filed an appeal to the final approval order challenging the Court’s award of attorneys’ fees to class counsel. We expect the remaining portion of the $350 million settlement payment to fund claims to be made once that appeal is resolved. We anticipate that, upon exhaustion of any appeals, the settlement will provide a full release of all claims arising out of the August 2021 cyberattack by class members who do not opt out, against all defendants, including us, our subsidiaries and affiliates, and our directors and officers. The settlement contains no admission of liability, wrongdoing or responsibility by any of the defendants. We have the right to terminate the settlement agreement under certain conditions.

We anticipate that this settlement of the class action, along with other settlements of separate consumer claims that have been previously completed or are currently pending, will resolve substantially all of the claims brought to date by our current, former and prospective customers who were impacted by the 2021 cyberattack. In connection with the proposed class action settlement and the separate settlements, we recorded a total pre-tax charge of approximately $400 million in the second quarter of 2022. During the three months ended March 31, 2023, we recognized $50 million in reimbursements from insurance carriers for costs incurred related to the August 2021 cyberattack, which is included as a reduction to Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income. The ultimate resolution of the class action depends on the number of plaintiffs who opt out of the proposed settlement and whether the proposed settlement will be appealed.

In addition, in September 2022, a purported Company shareholder filed a derivative action in the Delaware Chancery Court under the caption Harper v. Sievert et al., Case No. 2022-0819-SG, against our current directors and certain of our former directors, alleging claims for breach of fiduciary duty relating to the Company’s cybersecurity practices. We are also named as a nominal defendant in the lawsuit. We are unable at this time to predict the potential outcome of this lawsuit or whether we may be subject to further private litigation.

We have also received inquiries from various government agencies, law enforcement and other governmental authorities related to the August 2021 cyberattack, which could result in substantial fines or penalties. We are cooperating fully with these agencies and regulators and working with them to resolve these matters. While we hope to resolve them in the near term, we cannot predict the timing or outcome of any of these matters or whether we may be subject to further regulatory inquiries, investigations, or enforcement actions.

In light of the inherent uncertainties involved in such matters and based on the information currently available to us, in addition to the previously recorded pre-tax charge of approximately $400 million noted above, we believe it is reasonably possible that we could incur additional losses associated with these proceedings and inquiries, and we will continue to evaluate information as it becomes known and will record an estimate for losses at the time or times when it is both probable that a loss has been incurred and the amount of the loss is reasonably estimable. Ongoing legal and other costs related to these proceedings and inquiries, as well as any potential future actions, may be substantial, and losses associated with any adverse judgments, settlements, penalties or other resolutions of such proceedings and inquiries could be material to our business, reputation, financial condition, cash flows and operating results.

On June 17, 2022, plaintiffs filed a putative antitrust class action complaint in the Northern District of Illinois, Dale et al. v. Deutsche Telekom AG, et al., Case No. 1:22-cv-03189, against DT, T-Mobile, and SoftBank, alleging that the Merger violated the antitrust laws and harmed competition in the U.S. retail cell service market. Plaintiffs seek injunctive relief and trebled monetary damages on behalf of a purported class of AT&T and Verizon customers who plaintiffs allege paid artificially inflated prices due to the Merger. We are vigorously defending this lawsuit, but we are unable to predict the potential outcome.

On January 5, 2023, we identified that a bad actor was obtaining data through a single Application Programming Interface (“API”) without authorization. Based on our investigation, the impacted API is only able to provide a limited set of customer account data, including name, billing address, email, phone number, date of birth, T-Mobile account number and information such as the number of lines on the account and plan features. The result from our investigation indicates that the bad actor(s) obtained data from this API for approximately 37 million current postpaid and prepaid customer accounts, though many of these accounts did not include the full data set. We believe that the bad actor first retrieved data through the impacted API starting on or around November 25, 2022. We have notified individuals whose information was impacted consistent with state and federal requirements.

In connection with the January 2023 cyberattack, we became subject to consumer class actions and regulatory inquiries, to which we will continue to respond in due course and may incur significant expenses. However, we cannot predict the timing or outcome of any of these potential matters or whether we may be subject to additional legal proceedings, claims, regulatory inquiries, investigations, or enforcement actions. In addition, we are unable to predict the full impact of this incident on customer behavior in the future, including whether a change in our customers’ behavior could negatively impact our results of operations on an ongoing basis, although we presently do not expect that it will have a material effect on our operations.

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Additional Financial Information

3 Months Ended

Mar. 31, 2024

Supplemental Financial Statement Elements [Abstract]

Additional Financial Information

Note 13 – Additional Financial Information

Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities are summarized as follows:

(in millions)	March 31, 2024		December 31, 2023
Accounts payable	$	3,345	$	5,573
Payroll and related benefits	682		1,142
Property and other taxes, including payroll	1,694		1,704
Accrued interest	887		818
Other accrued liabilities	1,112		1,136
Accounts payable and accrued liabilities	$	7,720	$	10,373

Book overdrafts included in accounts payable were $702 million and $740 million as of March 31, 2024, and December 31, 2023, respectively.

Supplemental Condensed Consolidated Statements of Cash Flows Information

The following table summarizes T-Mobile’s supplemental cash flow information:

	Three Months Ended March 31,
(in millions)	2024		2023
Interest payments, net of amounts capitalized	$	896	$	840
Operating lease payments	1,344		1,314
Income tax payments	7		27
Non-cash investing and financing activities
Non-cash beneficial interest obtained in exchange for securitized receivables	$	661	$	1,119
Change in accounts payable and accrued liabilities for purchases of property and equipment	(894)		(329)
Operating lease right-of-use assets obtained in exchange for lease obligations	487		439
Financing lease right-of-use assets obtained in exchange for lease obligations	263		239

Cash and cash equivalents, including restricted cash

Cash and cash equivalents, including restricted cash, presented on our Condensed Consolidated Statements of Cash Flows were included on our Condensed Consolidated Balance Sheets as follows:

(in millions)	March 31, 2024		December 31, 2023
Cash and cash equivalents	$	6,708	$	5,135
Restricted cash (included in Other current assets)	154		101
Restricted cash (included in Other assets)	76		71
Cash and cash equivalents, including restricted cash	$	6,938	$	5,307

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Subsequent Events

3 Months Ended

Mar. 31, 2024

Subsequent Events [Abstract]

Subsequent Events

Note 14 – Subsequent Events

Subsequent to March 31, 2024, from April 1, 2024, through April 19, 2024, we repurchased 5,427,946 shares of our common stock at an average price per share of $160.97 for a total purchase price of $874 million. See Note 10 - Stockholder Return Program for additional information regarding the 2023-2024 Stockholder Return Program.

Subsequent to March 31, 2024, on April 24, 2024, we entered into a Merger Agreement with a fund operated by EQT Infrastructure VI fund (“Fund VI”) for the joint acquisition by us and Fund VI of Lumos, a fiber-to-the-home platform (“Lumos”), from EQT’s predecessor fund EQT Infrastructure III. The Lumos acquisition is expected to close in late 2024 or early 2025, subject to customary closing conditions and regulatory approvals. At closing, we expect to invest approximately $950 million in the joint venture to acquire a 50% equity interest and all existing fiber customers. The funds invested by us will be used to fund future fiber builds. In addition, we are expected to contribute an additional commitment of approximately $500 million between 2027 and 2028.

Subsequent to March 31, 2024, on April 25, 2024, we received all necessary regulatory approvals for the Ka’ena Acquisition, which is expected to close on May 1, 2024. See Note 2 - Business Combination for more information.

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Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 2,374	$ 1,940

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Insider Trading Arrangements

3 Months Ended

Mar. 31, 2024

shares

Trading Arrangements, by Individual

Non-Rule 10b5-1 Arrangement Adopted

false

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

Jonathan Freier [Member]

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

On February 21, 2024, Jonathan Freier, the Company’s President, Consumer Group, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell up to 30,000 shares of the Company’s common stock between May 23, 2024, and October 31, 2024, subject to certain conditions. The duration of this trading plan is 253 days.

Name

Jonathan Freier

Title

President

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

February 21, 2024

Arrangement Duration

253 days

Aggregate Available

30,000

Mark Nelson [Member]

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

On February 21, 2024, Mark Nelson, the Company’s Executive Vice President and General Counsel, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell all of the Company’s common stock he acquires on October 11, 2024, and February 15, 2025, respectively, upon the vesting of certain time-based restricted stock unit awards and performance-based restricted stock unit awards (“PRSUs”), for a total of up to 167,923 shares if the PRSUs vest at maximum value, subject to certain conditions. The duration of this trading plan is 360 days.

Name

Mark Nelson

Title

Executive Vice President and General Counsel

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

February 21, 2024

Arrangement Duration

360 days

Aggregate Available

167,923

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Consolidation

The unaudited condensed consolidated financial statements of T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”) include all adjustments of a normal recurring nature necessary for the fair presentation of the results for the interim periods presented. The results for the interim periods are not necessarily indicative of those for the full year. The condensed consolidated financial statements should be read in conjunction with our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2023.

The condensed consolidated financial statements include the balances and results of operations of T-Mobile and our consolidated subsidiaries. We consolidate majority-owned subsidiaries over which we exercise control, as well as variable interest entities (“VIEs”) for which we are deemed to be the primary beneficiary and VIEs, which cannot be deconsolidated, such as those related to our obligations to pay for the management and operation of certain of our wireless communications tower sites. Intercompany transactions and balances have been eliminated in consolidation.

Basis of Accounting

The preparation of financial statements in conformity with United States (“U.S.”) generally accepted accounting principles (“GAAP”) requires our management to make estimates and assumptions that affect the financial statements and accompanying notes.

Use of Estimates

Estimates are based on historical experience, where applicable, and other assumptions that management believes are reasonable under the circumstances. Estimates are inherently subject to judgment and actual results could differ from those estimates.

Accounting Pronouncements Not Yet Adopted

Accounting Pronouncements Not Yet Adopted

Segment Reporting Disclosures

In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The standard expands reportable segment disclosure requirements for public business entities primarily through enhanced disclosures about significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit (referred to as the “significant expense principle”). The standard will become effective for us for our fiscal year 2024 annual financial statements and interim financial statements thereafter and will be applied retrospectively for all prior periods presented in the financial statements, with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2024 annual financial statements. We are currently evaluating the impact this guidance will have on the disclosures included in the Notes to the Consolidated Financial Statements.

Income Tax Disclosures

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The standard enhances income tax disclosure requirements for all entities by requiring specified categories and greater disaggregation within the rate reconciliation table, disclosure of income taxes paid by jurisdiction, and providing clarification on uncertain tax positions and related financial statement impacts. The standard will be effective for us for our fiscal year 2025 annual financial statements with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2025 annual financial statements, and we expect the adoption of the standard will impact certain of our income tax disclosures.

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Receivables and Related Allowance for Credit Losses (Tables)

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

Schedule of Equipment Installment Plan Receivables

The following table summarizes the EIP receivables, including imputed discounts and related allowance for credit losses:

(in millions)	March 31, 2024		December 31, 2023
EIP receivables, gross	$	6,724	$	7,271
Unamortized imputed discount	(489)		(505)
EIP receivables, net of unamortized imputed discount	6,235		6,766
Allowance for credit losses	(268)		(268)
EIP receivables, net of allowance for credit losses and imputed discount	$	5,967	$	6,498
Classified on our condensed consolidated balance sheets as:
Equipment installment plan receivables, net of allowance for credit losses and imputed discount	$	4,059	$	4,456
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount	1,908		2,042
EIP receivables, net of allowance for credit losses and imputed discount	$	5,967	$	6,498

Schedule of Equipment Installment Plan Receivables by Credit Category

The following table presents the amortized cost of our EIP receivables by delinquency status, customer credit class and year of origination as of March 31, 2024:

	Originated in 2024				Originated in 2023				Originated prior to 2023				Total EIP Receivables, Net of Unamortized Imputed Discount
(in millions)	Prime		Subprime		Prime		Subprime		Prime		Subprime		Prime		Subprime		Total
Current - 30 days past due	$	1,188	$	360	$	2,923	$	730	$	721	$	203	$	4,832	$	1,293	$	6,125
31 - 60 days past due	3		4		12		16		4		4		19		24		43
61 - 90 days past due	—		1		10		15		4		3		14		19		33
More than 90 days past due	—		—		9		15		6		4		15		19		34
EIP receivables, net of unamortized imputed discount	$	1,191	$	365	$	2,954	$	776	$	735	$	214	$	4,880	$	1,355	$	6,235

Schedule of Write Offs Net of Recoveries

The following table presents write-offs of our EIP receivables by year of origination for the three months ended March 31, 2024:

(in millions)	Originated in 2024		Originated in 2023		Originated prior to 2023		Total Write-offs
Write-offs	$	2	$	114	$	34	$	150

Schedule of Unamortized Imputed Discount and Allowance for Credit Losses for Equipment Installment Plan Receivables

Activity for the three months ended March 31, 2024 and 2023, in the allowance for credit losses and unamortized imputed discount balances for the accounts receivable and EIP receivables segments were as follows:

	March 31, 2024						March 31, 2023
(in millions)	Accounts Receivable Allowance		EIP Receivables Allowance		Total		Accounts Receivable Allowance		EIP Receivables Allowance		Total
Allowance for credit losses and imputed discount, beginning of period	$	161	$	773	$	934	$	167	$	811	$	978
Bad debt expense	132		150		282		107		115		222
Write-offs	(132)		(150)		(282)		(122)		(140)		(262)
Change in imputed discount on short-term and long-term EIP receivables	N/A		31		31		N/A		54		54
Impact on the imputed discount from sales of EIP receivables	N/A		(47)		(47)		N/A		(54)		(54)
Allowance for credit losses and imputed discount, end of period	$	161	$	757	$	918	$	152	$	786	$	938

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Sales of Certain Receivables (Tables)

3 Months Ended

Mar. 31, 2024

Transfers and Servicing [Abstract]

Schedule of Variable Interest Entities - EIP

The following table summarizes the carrying amounts and classification of assets, which consist primarily of the deferred purchase price, included on our Condensed Consolidated Balance Sheets with respect to the EIP BRE:

(in millions)	March 31, 2024		December 31, 2023
Other current assets	$	330	$	348
Other assets	95		103

Schedule of Variable Interest Entities

The following table summarizes the carrying amounts and classification of assets, which consist primarily of the deferred purchase price, and liabilities included on our Condensed Consolidated Balance Sheets with respect to the Service BRE:

(in millions)	March 31, 2024		December 31, 2023
Other current assets	$	164	$	209
Other current liabilities	423		373

The following table summarizes the carrying amounts and classification of assets and liabilities included in our Condensed Consolidated Balance Sheets with respect to the ABS Entities:

(in millions)	March 31, 2024		December 31, 2023
Assets
Equipment installment plan receivables, net	$	1,123	$	739
Equipment installment plan receivables due after one year, net	376		168
Other current assets	154		101
Liabilities
Accounts payable and accrued liabilities	$	2	$	1
Short-term debt	413		198
Long-term debt	833		550

Schedule of Factoring Arrangement

The following table summarizes the impact of the sale of certain service accounts receivable and EIP receivables on our Condensed Consolidated Balance Sheets:

(in millions)	March 31, 2024		December 31, 2023
Derecognized net service accounts receivable and EIP receivables	$	2,249	$	2,388
Other current assets	494		557
of which, deferred purchase price	491		555
Other long-term assets	95		103
of which, deferred purchase price	95		103
Other current liabilities	423		373
Net cash proceeds since inception	1,554		1,583
Of which:
Change in net cash proceeds during the year-to-date period	(29)		(114)
Net cash proceeds funded by reinvested collections	1,583		1,697

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Spectrum License Transactions (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Spectrum Licenses

The following table summarizes our spectrum license activity for the three months ended March 31, 2024:

(in millions)	2024
Spectrum licenses, beginning of year	$	96,707
Spectrum license acquisitions	411
Spectrum licenses transferred to held for sale	(17)
Costs to clear spectrum	53
Spectrum licenses, end of period	$	97,154

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Carrying Values and Fair Values of Long-term Debt

The carrying amounts and fair values of our short-term and long-term debt included on our Condensed Consolidated Balance Sheets were as follows:

(in millions)	Level within the Fair Value Hierarchy	March 31, 2024				December 31, 2023
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
Liabilities:
Senior Notes to third parties	1	$	73,421	$	67,914	$	70,493	$	65,962
Senior Notes to affiliates	2	1,496		1,464		1,496		1,499
Senior Secured Notes to third parties	1	2,050		1,994		2,281		2,207
ABS Notes to third parties	2	1,246		1,244		748		748

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Debt (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Schedule of Debt Balances and Activity

The following table sets forth the debt balances and activity as of, and for the three months ended, March 31, 2024:

(in millions)	December 31, 2023		Proceeds from Issuances and Borrowings (1)		Repayments		Reclassifications (1)		Other (2)		March 31, 2024
Short-term debt	$	3,619	$	—	$	(223)	$	1,983	$	(23)	$	5,356
Long-term debt	69,903		3,473		—		(1,983)		(32)		71,361
Total debt to third parties	73,522		3,473		(223)		—		(55)		76,717
Long-term debt to affiliates	1,496		—		—		—		—		1,496
Total debt	$	75,018	$	3,473	$	(223)	$	—	$	(55)	$	78,213

(1)Issuances and borrowings and reclassifications are recorded net of accrued or paid issuance costs and discounts.

(2)Other includes the amortization of premiums, discounts, debt issuance costs and consent fees.

During the three months ended March 31, 2024, we issued the following Senior Notes:

(in millions)	Principal Issuances		Discounts and Issuance Costs, Net		Net Proceeds from Issuance of Long-Term Debt		Issue Date
4.850% Senior Notes due 2029	$	1,000	$	(6)	$	994	January 12, 2024
5.150% Senior Notes due 2034	1,250		(11)		1,239		January 12, 2024
5.500% Senior Notes due 2055	750		(7)		743		January 12, 2024
Total of Senior Notes issued	$	3,000	$	(24)	$	2,976
5.050% Class A Senior ABS Notes due 2029	$	500	$	(3)	$	497	February 14, 2024
Total of ABS Notes issued	$	500	$	(3)	$	497

Schedule of Debt Instrument Redemption and Repayments

During the three months ended March 31, 2024, we made the following repayments:

(in millions)	Principal Amount		Repayment Date
4.738% Secured Series 2018-1 A-1 Notes due 2025	$	131	Various
5.152% Series 2018-1 A-2 Notes due 2028	92		Various
Total Repayments	$	223

Schedule of Maturities of ABS Notes

The expected maturities of our ABS Notes as of March 31, 2024, were as follows:

(in millions)	Expected Maturities
2024	$	198
2025	552
2026	459
2027	41
Total	$	1,250

Schedule of Variable Interest Entities

The following table summarizes the carrying amounts and classification of assets, which consist primarily of the deferred purchase price, and liabilities included on our Condensed Consolidated Balance Sheets with respect to the Service BRE:

(in millions)	March 31, 2024		December 31, 2023
Other current assets	$	164	$	209
Other current liabilities	423		373

The following table summarizes the carrying amounts and classification of assets and liabilities included in our Condensed Consolidated Balance Sheets with respect to the ABS Entities:

(in millions)	March 31, 2024		December 31, 2023
Assets
Equipment installment plan receivables, net	$	1,123	$	739
Equipment installment plan receivables due after one year, net	376		168
Other current assets	154		101
Liabilities
Accounts payable and accrued liabilities	$	2	$	1
Short-term debt	413		198
Long-term debt	833		550

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Tower Obligations (Tables)

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Schedule of Impacts to Consolidated Balance Sheets

The following table summarizes the balances associated with both of the tower arrangements on our Condensed Consolidated Balance Sheets:

(in millions)	March 31, 2024		December 31, 2023
Property and equipment, net	$	2,182	$	2,220
Tower obligations	3,751		3,777
Other long-term liabilities	554		554

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Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Postpaid service revenues, including postpaid phone revenues and postpaid other revenues, were as follows:

	Three Months Ended March 31,
(in millions)	2024		2023
Postpaid service revenues
Postpaid phone revenues	$	11,145	$	10,652
Postpaid other revenues	1,486		1,210
Total postpaid service revenues	$	12,631	$	11,862

Schedule of Contract Liability and Receivable Balances

The contract asset and contract liability balances from contracts with customers as of March 31, 2024, and December 31, 2023, were as follows:

(in millions)	Contract Assets		Contract Liabilities
Balance as of December 31, 2023	$	607	$	812
Balance as of March 31, 2024	548		836
Change	$	(59)	$	24

Revenues for the three months ended March 31, 2024 and 2023 include the following:

	Three Months Ended March 31,
(in millions)	2024		2023
Amounts included in the beginning of year contract liability balance	$	698	$	667

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Share

The computation of basic and diluted earnings per share was as follows:

	Three Months Ended March 31,
(in millions, except shares and per share amounts)	2024		2023
Net income	$	2,374	$	1,940
Weighted-average shares outstanding – basic	1,185,298,497		1,219,608,362
Effect of dilutive securities:
Outstanding stock options, unvested stock awards	3,793,522		4,996,336
Weighted-average shares outstanding – diluted	1,189,092,019		1,224,604,698
Earnings per share – basic	$	2.00	$	1.59
Earnings per share – diluted	$	2.00	$	1.58
Potentially dilutive securities:
Outstanding stock options and unvested stock awards	6		98,175
SoftBank contingent consideration (1)	—		48,751,557

(1)     Represents the weighted-average number of shares (“SoftBank Specified Shares”) that were contingently issuable from the Merger date of April 1, 2020, pursuant to a letter agreement dated February 20, 2020, between T-Mobile, SoftBank and DT (the “Letter Agreement”). The SoftBank Specified Shares were determined to be contingent consideration for the Merger and was not dilutive until the defined volume-weighted average price per share was reached (the “Threshold Price”). As of the close of trading on December 22, 2023, the Threshold Price was reached. On December 28, 2023, the Company issued the SoftBank Specified Shares to SoftBank in accordance with the Letter Agreement.

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Additional Financial Information (Tables)

3 Months Ended

Mar. 31, 2024

Supplemental Financial Statement Elements [Abstract]

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities are summarized as follows:

(in millions)	March 31, 2024		December 31, 2023
Accounts payable	$	3,345	$	5,573
Payroll and related benefits	682		1,142
Property and other taxes, including payroll	1,694		1,704
Accrued interest	887		818
Other accrued liabilities	1,112		1,136
Accounts payable and accrued liabilities	$	7,720	$	10,373

Schedule of Supplemental Consolidated Statements of Cash Flows Information

The following table summarizes T-Mobile’s supplemental cash flow information:

	Three Months Ended March 31,
(in millions)	2024		2023
Interest payments, net of amounts capitalized	$	896	$	840
Operating lease payments	1,344		1,314
Income tax payments	7		27
Non-cash investing and financing activities
Non-cash beneficial interest obtained in exchange for securitized receivables	$	661	$	1,119
Change in accounts payable and accrued liabilities for purchases of property and equipment	(894)		(329)
Operating lease right-of-use assets obtained in exchange for lease obligations	487		439
Financing lease right-of-use assets obtained in exchange for lease obligations	263		239

Schedule of Cash and Cash Equivalents, Including Restricted Cash

Cash and cash equivalents, including restricted cash, presented on our Condensed Consolidated Statements of Cash Flows were included on our Condensed Consolidated Balance Sheets as follows:

(in millions)	March 31, 2024		December 31, 2023
Cash and cash equivalents	$	6,708	$	5,135
Restricted cash (included in Other current assets)	154		101
Restricted cash (included in Other assets)	76		71
Cash and cash equivalents, including restricted cash	$	6,938	$	5,307

Schedule of Restricted Cash

Cash and cash equivalents, including restricted cash, presented on our Condensed Consolidated Statements of Cash Flows were included on our Condensed Consolidated Balance Sheets as follows:

(in millions)	March 31, 2024		December 31, 2023
Cash and cash equivalents	$	6,708	$	5,135
Restricted cash (included in Other current assets)	154		101
Restricted cash (included in Other assets)	76		71
Cash and cash equivalents, including restricted cash	$	6,938	$	5,307

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Business Combination (Details) - Ka Ena Corporation - USD ($) $ in Millions	Mar. 31, 2024	Mar. 13, 2024	Mar. 09, 2023
Merger And Unit Purchase Agreement
Business Acquisition [Line Items]
Business acquisition, outstanding (percent)			100.00%
Total consideration transferred			$ 1,350
Business acquisition, cash acquired (percent)			39.00%
Business acquisition, common shares acquired (percent)			61.00%
Merger and Unit Purchase Agreement, Amendment No. 1
Business Acquisition [Line Items]
Business acquisition, variable earnout payable period		24 months
Estimated upfront payment	$ 1,200
Estimated upfront payment, net	$ 950
Upfront payment to be paid in cash (percent)	45.00%

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Receivables and Related Allowance for Credit Losses - Schedule of Equipment Installment Plan Receivables (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) segment class	Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Portfolio segments | segment	2
Customer classes | class	2
EIP receivables, gross	$ 6,724	$ 7,271
Unamortized imputed discount	(489)	(505)
EIP receivables, net of unamortized imputed discount	6,235	6,766
Allowance for credit losses	(268)	(268)
EIP receivables, net of allowance for credit losses and imputed discount	5,967	6,498
Equipment installment plan receivables, net of allowance for credit losses and imputed discount
Accounts, Notes, Loans and Financing Receivable [Line Items]
EIP receivables, net of allowance for credit losses and imputed discount	4,059	4,456
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount
Accounts, Notes, Loans and Financing Receivable [Line Items]
EIP receivables, net of allowance for credit losses and imputed discount	$ 1,908	$ 2,042
EIP Receivables Allowance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average effective imputed interest rate	11.10%	10.60%

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Receivables and Related Allowance for Credit Losses - Schedule of Equipment Installment Plan Receivables by Credit Category (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
EIP receivables, net of unamortized imputed discount	$ 6,235	$ 6,766
Prime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	1,191
Originated in 2023	2,954
Originated prior to 2023	735
EIP receivables, net of unamortized imputed discount	4,880
Subprime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	365
Originated in 2023	776
Originated prior to 2023	214
EIP receivables, net of unamortized imputed discount	1,355
Current - 30 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
EIP receivables, net of unamortized imputed discount	6,125
Current - 30 days past due | Prime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	1,188
Originated in 2023	2,923
Originated prior to 2023	721
EIP receivables, net of unamortized imputed discount	4,832
Current - 30 days past due | Subprime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	360
Originated in 2023	730
Originated prior to 2023	203
EIP receivables, net of unamortized imputed discount	1,293
31 - 60 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
EIP receivables, net of unamortized imputed discount	43
31 - 60 days past due | Prime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	3
Originated in 2023	12
Originated prior to 2023	4
EIP receivables, net of unamortized imputed discount	19
31 - 60 days past due | Subprime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	4
Originated in 2023	16
Originated prior to 2023	4
EIP receivables, net of unamortized imputed discount	24
61 - 90 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
EIP receivables, net of unamortized imputed discount	33
61 - 90 days past due | Prime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	0
Originated in 2023	10
Originated prior to 2023	4
EIP receivables, net of unamortized imputed discount	14
61 - 90 days past due | Subprime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	1
Originated in 2023	15
Originated prior to 2023	3
EIP receivables, net of unamortized imputed discount	19
More than 90 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
EIP receivables, net of unamortized imputed discount	34
More than 90 days past due | Prime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	0
Originated in 2023	9
Originated prior to 2023	6
EIP receivables, net of unamortized imputed discount	15
More than 90 days past due | Subprime
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in 2024	0
Originated in 2023	15
Originated prior to 2023	4
EIP receivables, net of unamortized imputed discount	$ 19

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Receivables and Related Allowance for Credit Losses - Schedule of Write Offs Net of Recoveries (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Write-offs
Originated in 2024	$ 2
Originated in 2023	114
Originated prior to 2023	34
Total Write-offs	$ 150

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Receivables and Related Allowance for Credit Losses - Schedule of Unamortized Imputed Discount and Allowance for Credit Losses for Equipment Installment Plan Receivables (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses and imputed discount, beginning of period	$ 934	$ 978
Bad debt expense	282	222
Write-offs	(282)	(262)
Change in imputed discount on short-term and long-term EIP receivables	31	54
Impact on the imputed discount from sales of EIP receivables	(47)	(54)
Allowance for credit losses and imputed discount, end of period	918	938
Accounts Receivable Allowance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses and imputed discount, beginning of period	161	167
Bad debt expense	132	107
Write-offs	(132)	(122)
Allowance for credit losses and imputed discount, end of period	161	152
EIP Receivables Allowance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses and imputed discount, beginning of period	773	811
Bad debt expense	150	115
Write-offs	(150)	(140)
Change in imputed discount on short-term and long-term EIP receivables	31	54
Impact on the imputed discount from sales of EIP receivables	(47)	(54)
Allowance for credit losses and imputed discount, end of period	$ 757	$ 786

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Sales of Certain Receivables - Schedule of Variable Interest Entities - EIP (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Other current assets	$ 2,039	$ 2,352
Other assets	4,000	4,229
EIP Securitization Arrangement
Variable Interest Entity [Line Items]
Revolving receivables facility, maximum borrowing capacity	1,300	1,300
Other current assets	330	348
Other assets	$ 95	$ 103

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Sales of Certain Receivables - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Other current assets	$ 2,039	$ 2,352
Other current liabilities	1,933	1,296
Variable Interest Entity, Not Primary Beneficiary | Factoring Arrangement
Variable Interest Entity [Line Items]
Revolving receivables facility, outstanding borrowings	775	775
Other current assets	164	209
Other current liabilities	$ 423	$ 373

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Sales of Certain Receivables - Schedule of Factoring Arrangement (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Other current assets	$ 2,039		$ 2,352
Other long-term assets	4,000		4,229
Other current liabilities	1,933		1,296
Of which:
Losses from sales of receivables	21	$ 38
Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Derecognized net service accounts receivable and EIP receivables	2,249		2,388
Other current assets	494		557
Other long-term assets	95		103
Other current liabilities	423		373
Net cash proceeds since inception	1,554		1,583
Of which:
Change in net cash proceeds during the year-to-date period	(29)		(114)
Net cash proceeds funded by reinvested collections	1,583		1,697
Service receivables and EIP receivables	586		658
Losses from sales of receivables	21	$ 38
Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | Other current assets - of which, deferred purchase price
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Carrying amounts of deferred purchase price assets	491		555
Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | Other long-term assets - of which, deferred purchase price
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Carrying amounts of deferred purchase price assets	$ 95		$ 103

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Goodwill, Spectrum License Transactions and Other Intangible Assets - Schedule of Spectrum Licenses (Details) - Licensing Agreements $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Indefinite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 96,707
Spectrum license acquisitions	411
Spectrum licenses transferred to held for sale	(17)
Costs to clear spectrum	53
Ending balance	$ 97,154

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Goodwill, Spectrum License Transactions and Other Intangible Assets - Narrative (Details) $ in Millions						1 Months Ended		3 Months Ended
	Oct. 15, 2023 USD ($)	Aug. 25, 2023 USD ($)	Mar. 30, 2023 USD ($) tranche	Aug. 08, 2022 USD ($)	Jul. 01, 2020 USD ($)	Sep. 30, 2022 USD ($) license	Jun. 30, 2022 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Oct. 25, 2023 USD ($)
Goodwill [Line Items]
Purchase of spectrum licenses									$ 61	$ 73
Spectrum Licenses | Channel 51 License Co, LLC And LB License Co, LLC
Goodwill [Line Items]
Total cash consideration				$ 3,500
T-Mobile and Sprint | Spectrum Licenses | DISH
Goodwill [Line Items]
Payments for asset acquisition	$ 3,600				$ 3,600
Non-refundable extension fee payable	100
Termination fee payable	72
Terminate and retain the extension fee	$ 100										$ 100
T-Mobile and Sprint | Spectrum Licenses | DISH | Forecast
Goodwill [Line Items]
Payments for asset acquisition								$ 3,600
T-Mobile and Sprint | Spectrum Licenses | DISH | Forecast | Selling, General and Administrative Expenses
Goodwill [Line Items]
Extension fee paid								$ 100
Licensing Agreements | Channel 51 License Co, LLC And LB License Co, LLC
Goodwill [Line Items]
Total cash consideration		$ 3,500
Number of tranches licenses | tranche			2
Transaction cost		$ 1,100
Closing period after regulatory approval			180 days
Payment period after closing			40 days
Licensing Agreements | Spectrum Licenses | Channel 51 License Co, LLC And LB License Co, LLC
Goodwill [Line Items]
Total cash consideration			$ 3,500
Auction 108
Goodwill [Line Items]
Aggregate purchase price						$ 304
Auction 108 | Licensing Agreements
Goodwill [Line Items]
Number of licenses | license						7,156
Purchase of spectrum licenses						$ 239	$ 65

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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative [Line Items]
Accumulated other comprehensive loss	$ 926		$ 964
Level 3 | Fair Value
Derivative [Line Items]
Carrying amounts of deferred purchase price assets	586		658
Interest Expense
Derivative [Line Items]
Amount amortized from AOCI into interest expense	57	$ 53
Amount expected to be amortized from AOCI into interest expense over next 12 months	241
Interest Rate Contract
Derivative [Line Items]
Accumulated other comprehensive loss	$ 1,100		$ 1,100

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Fair Value Measurements - Schedule of Carrying Values and Fair Values of Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Carrying Amount | Senior Notes | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 73,421	$ 70,493
Carrying Amount | Senior Notes | Third Party | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	2,050	2,281
Carrying Amount | Senior Notes | Related Party | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	1,496	1,496
Carrying Amount | ABS Notes | Related Party | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	1,246	748
Fair Value | Senior Notes | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	67,914	65,962
Fair Value | Senior Notes | Third Party | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	1,994	2,207
Fair Value | Senior Notes | Related Party | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	1,464	1,499
Fair Value | ABS Notes | Related Party | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,244	$ 748

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Debt - Schedule of Debt Balances and Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Balances and Activity [Roll Forward]
Repayments of long-term debt	$ (223)	$ (131)
Total Debt
Debt Balances and Activity [Roll Forward]
Total debt, beginning balance	75,018
Proceeds from issuances and borrowings	3,473
Repayments	(223)
Reclassifications	0
Other	(55)
Total debt, ending balance	78,213
Third Party | Total Debt
Debt Balances and Activity [Roll Forward]
Total debt, beginning balance	73,522
Proceeds from issuances and borrowings	3,473
Repayments	(223)
Reclassifications	0
Other	(55)
Total debt, ending balance	76,717
Short-term debt | Third Party
Debt Balances and Activity [Roll Forward]
Short-term debt, beginning balance	3,619
Proceeds from issuance of short-term debt	0
Repayments of short-term debt	(223)
Reclassifications	1,983
Other	(23)
Short-term debt, ending balance	5,356
Long-term debt | Third Party
Debt Balances and Activity [Roll Forward]
Long-term debt, beginning balance	69,903
Net proceeds from issuance of long-term debt	3,473
Repayments of long-term debt	0
Reclassifications	(1,983)
Other	(32)
Long-term debt, ending balance	71,361
Long-term debt | Affiliates
Debt Balances and Activity [Roll Forward]
Total debt, beginning balance	1,496
Proceeds from issuances and borrowings	0
Repayments	0
Reclassifications	0
Other	0
Total debt, ending balance	$ 1,496

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Debt - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Feb. 14, 2024
Debt Instrument [Line Items]
Effective interest rate	4.10%	4.00%
Weighted-average debt outstanding during period	$ 77,400,000,000	$ 73,400,000,000
ABS Notes
Debt Instrument [Line Items]
Carrying amounts of deferred purchase price assets	1,700,000,000		$ 667,000,000
Net Proceeds from Issuance of Long-Term Debt	497,000,000
Carrying value	$ 1,250,000,000
A Senior Class | ABS Notes
Debt Instrument [Line Items]
Principal Issuances			$ 500,000,000
Interest rate, stated percentage			5.05%

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Debt - Schedule of Issuances and Borrowings (Details) - USD ($)			3 Months Ended
	Feb. 14, 2024	Jan. 12, 2024	Mar. 31, 2024
Senior Notes
Debt Instrument [Line Items]
Principal Issuances			$ 3,000,000,000
Discounts and Issuance Costs, Net			(24,000,000)
Net Proceeds from Issuance of Long-Term Debt			2,976,000,000
Secured Debt
Debt Instrument [Line Items]
Principal Issuances			500,000,000
Discounts and Issuance Costs, Net			(3,000,000)
Net Proceeds from Issuance of Long-Term Debt			$ 497,000,000
4.850% Senior Notes due 2029 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage			4.85%
Principal Issuances		$ 1,000,000,000
Discounts and Issuance Costs, Net		(6,000,000)
Net Proceeds from Issuance of Long-Term Debt		994,000,000
5.150% Senior Notes due 2034 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage			5.15%
Principal Issuances		1,250,000,000
Discounts and Issuance Costs, Net		(11,000,000)
Net Proceeds from Issuance of Long-Term Debt		1,239,000,000
5.500% Senior Notes due 2055 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage			5.50%
Principal Issuances		750,000,000
Discounts and Issuance Costs, Net		(7,000,000)
Net Proceeds from Issuance of Long-Term Debt		$ 743,000,000
$5.050% Class A Senior ABS Notes due 2029 | 2025
Debt Instrument [Line Items]
Interest rate, stated percentage			5.05%
Principal Issuances	$ 500,000,000
Discounts and Issuance Costs, Net	(3,000,000)
Net Proceeds from Issuance of Long-Term Debt	$ 497,000,000

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Debt - Schedule of Debt Instrument Redemption and Repayments (Details)	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Principal Amount	$ 223,000,000
Senior Notes | 4.738% Series 2018-1 A-1 Notes due 2025
Debt Instrument [Line Items]
Interest rate, stated percentage	4.738%
Principal Amount	$ 131,000,000
Senior Notes | 5.152% Series 2018-1 A-2 Notes due 2028
Debt Instrument [Line Items]
Interest rate, stated percentage	5.152%
Principal Amount	$ 92,000,000

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Debt - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Equipment installment plan receivables, net	$ 4,059	$ 4,456
Equipment installment plan receivables due after one year, net	1,908	2,042
Other current assets	2,039	2,352
Accounts payable and accrued liabilities	7,720	10,373
Short-term debt	5,356	3,619
Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Equipment installment plan receivables, net	1,123	739
Equipment installment plan receivables due after one year, net	376	168
Other current assets	154	101
Accounts payable and accrued liabilities	2	1
Short-term debt	413	198
Long-term debt	$ 833	$ 550

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Debt - Schedule of Maturities of ABS Notes (Details) - ABS Notes $ in Millions	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
2024	$ 198
2025	552
2026	459
2027	41
Total debt	$ 1,250

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Tower Obligations - Narrative (Details) $ in Millions			12 Months Ended
	Jan. 03, 2022 USD ($)	Apr. 01, 2020 USD ($) tower_site renewal_option	Dec. 31, 2012 USD ($) tower_site	Mar. 31, 2024 USD ($) tower_site
Sale Leaseback Transaction [Line Items]
Number of renewal options | renewal_option		0
Tower obligation payments, due next year				$ 421
Tower obligation payments, due within two and three years				774
Tower obligation payment, due within four and five years				816
Tower obligation payments due thereafter				$ 4,000
Tower Transaction
Sale Leaseback Transaction [Line Items]
Lessee leasing arrangements, operating leases, term of contract (years)	12 years
Sale leaseback transaction, fixed-price purchase options			$ 2,000
Interest rate on tower obligations	11.60%
Tower Transaction | Tower
Sale Leaseback Transaction [Line Items]
Useful life (in years)				20 years
Tower Transaction | Minimum
Sale Leaseback Transaction [Line Items]
Lessee leasing arrangements, operating leases, term of contract (years)			23 years
Tower Transaction | Maximum
Sale Leaseback Transaction [Line Items]
Lessee leasing arrangements, operating leases, term of contract (years)			37 years
CCI Tower Lease Arrangement | Crown Castle International Corp.
Sale Leaseback Transaction [Line Items]
Interest rate on tower obligations	5.30%
Crown Castle International Corp.
Sale Leaseback Transaction [Line Items]
Increase to deferred tax liabilities	$ 1,200
Managed sites | tower_site				900
Lease liability				$ 241
Crown Castle International Corp. | Tower Transaction
Sale Leaseback Transaction [Line Items]
Property subject to failed sale leaseback transaction, number of units | tower_site		6,400	6,200
Remaining term of lease		17 years
Fixed-price purchase option on leased or subleased sites		$ 2,300
Fixed-price purchase option on lease or subleased sites, exercisable period		1 year
Days prior to expiration of agreement		120 days

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Tower Obligations - Schedule of Impacts to Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Property and equipment, net
Sale Leaseback Transaction [Line Items]
Sale-leasebacks	$ 2,182	$ 2,220
Tower obligations
Sale Leaseback Transaction [Line Items]
Sale-leasebacks	3,751	3,777
Other long-term liabilities
Sale Leaseback Transaction [Line Items]
Sale-leasebacks	$ 554	$ 554

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Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) customer_category	Mar. 31, 2023 USD ($)
Disaggregation of Revenue [Line Items]
Number of customer categories | customer_category	3
Revenues	$ 19,594	$ 19,632
Postpaid phone revenues
Disaggregation of Revenue [Line Items]
Revenues	11,145	10,652
Postpaid other revenues
Disaggregation of Revenue [Line Items]
Revenues	1,486	1,210
Total postpaid service revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 12,631	$ 11,862

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Revenue from Contracts with Customers - Schedule of Contract Liability and Receivable Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Contract Assets	$ 548		$ 607
Contract Liabilities	836		812
Change in contract assets included in other current assets	(59)
Change in contracts liabilities included in deferred revenue	24
Current portion of contract assets	449		$ 495
Amounts included in the beginning of year contract liability balance	$ 698	$ 667

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Revenue from Contracts with Customers - Remaining Performance Obligations, Branded Postpaid Contracts (Details) $ in Billions	3 Months Ended
	Mar. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	1.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2.8
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining contract duration (in years)	1 year
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining contract duration (in years)	8 years
Total postpaid service revenues
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1.3
Remaining contract duration (in years)	24 months

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Revenue from Contracts with Customers - Contract Costs (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Capitalized Contract Cost [Abstract]
Deferred incremental costs to obtain contracts	$ 2,100,000,000		$ 2,100,000,000
Average amortization period, deferred contract costs (in months)	24 months
Amortization of deferred costs	$ 489,000,000	$ 422,000,000
Impairment losses recognized on deferred contract cost assets	$ 0	$ 0

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Revenue from Contracts with Customers - Remaining Performance Obligations (Details)	Mar. 31, 2024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction, period

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Stockholder Return Program (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended
	Mar. 15, 2024	Jan. 24, 2024	Apr. 19, 2024	Mar. 31, 2024	Mar. 31, 2023	Sep. 06, 2023
Equity, Class of Treasury Stock [Line Items]
Common stock, dividends declared (in USD per share)				$ 1.30
Purchase price				$ 3,604	$ 4,810
2023-2024 Stockholder Return Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount						$ 19,000
Cash dividends				769
Dividends payable				$ 756
Repurchases of common stock (in shares)				21,933,790
Average price paid per share (in USD per share)				$ 162.69
Purchase price				$ 3,600
Stock repurchase authorization amount				11,700
2023-2024 Stockholder Return Program | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Repurchases of common stock (in shares)			5,427,946
Average price paid per share (in USD per share)			$ 160.97
Purchase price			$ 874
Stock repurchase authorization amount			$ 10,800
2023-2024 Stockholder Return Program | DT
Equity, Class of Treasury Stock [Line Items]
Cash dividends				388
Dividends payable				$ 386
2023-2024 Stockholder Return Program | Director
Equity, Class of Treasury Stock [Line Items]
Common stock, dividends declared (in USD per share)	$ 0.65	$ 0.65

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Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net income	$ 2,374	$ 1,940
Weighted-average shares outstanding - basic (in shares)	1,185,298,497	1,219,608,362
Effect of dilutive securities:
Outstanding stock options, unvested stock awards (in shares)	3,793,522	4,996,336
Weighted-average shares outstanding - diluted (in shares)	1,189,092,019	1,224,604,698
Earnings per share - basic (in USD per share)	$ 2.00	$ 1.59
Earnings per share - diluted (in USD per share)	$ 2.00	$ 1.58
Outstanding stock options and unvested stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	6	98,175
SoftBank contingent consideration
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	0	48,751,557

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Earnings Per Share - Narrative (Details) - Mandatory Convertible Preferred Stock Series A - $ / shares	Mar. 31, 2024	Mar. 31, 2023
Class of Stock [Line Items]
Preferred shares authorized (in shares)	100,000,000
Preferred stock, par value (in USD per share)	$ 0.00001
Preferred shares outstanding (in shares)	0	0

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Commitments and Contingencies (Details) $ in Millions				3 Months Ended	20 Months Ended
	Jul. 31, 2023 USD ($)	Jun. 29, 2023 USD ($)	Jan. 05, 2023 customer_account	Mar. 31, 2023 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Proposed litigation settlement	$ 350	$ 350
Aggregate incremental expense						$ 150	$ 150
Paid claims administration					$ 35
Number of customer accounts impacted | customer_account			37,000,000
Selling, General and Administrative Expenses
Loss Contingencies [Line Items]
Aggregate incremental expense								$ 400	$ 400
Reimbursements from insurance carriers for costs				$ 50

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Additional Financial Information - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts Payable and Accrued Liabilities [Line Items]
Accounts payable	$ 3,345	$ 5,573
Payroll and related benefits	682	1,142
Property and other taxes, including payroll	1,694	1,704
Accrued interest	887	818
Other accrued liabilities	1,112	1,136
Accounts payable and accrued liabilities	7,720	10,373
Accounts Payable and Accrued Liabilities
Accounts Payable and Accrued Liabilities [Line Items]
Outstanding checks	$ 702	$ 740

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Additional Financial Information - Schedule of Supplemental Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Supplemental Financial Statement Elements [Abstract]
Interest payments, net of amounts capitalized	$ 896	$ 840
Operating lease payments	1,344	1,314
Income tax payments	7	27
Non-cash investing and financing activities
Non-cash beneficial interest obtained in exchange for securitized receivables	661	1,119
Change in accounts payable and accrued liabilities for purchases of property and equipment	894	(329)
Operating lease right-of-use assets obtained in exchange for lease obligations	487	439
Financing lease right-of-use assets obtained in exchange for lease obligations	$ 263	$ 239

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Additional Financial Information - Schedule of Cash and Cash Equivalents, Including Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Supplemental Financial Statement Elements [Abstract]
Cash and cash equivalents	$ 6,708	$ 5,135
Restricted cash (included in Other current assets)	154	101
Restricted cash (included in Other assets)	76	71
Cash and cash equivalents, including restricted cash and cash held for sale	$ 6,938	$ 5,307

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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended	24 Months Ended
	Apr. 19, 2024	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2025	Dec. 31, 2028
Subsequent Event [Line Items]
Purchase price		$ 3,604	$ 4,810
Lumos | Forecast
Subsequent Event [Line Items]
Expected investment to acquire interest in joint venture				$ 950	$ 500
Ownership interest in joint venture (percent)				50.00%
2023-2024 Stockholder Return Program
Subsequent Event [Line Items]
Repurchases of common stock (in shares)		21,933,790
Average price paid per share (in USD per share)		$ 162.69
Purchase price		$ 3,600
Subsequent Event | 2023-2024 Stockholder Return Program
Subsequent Event [Line Items]
Repurchases of common stock (in shares)	5,427,946
Average price paid per share (in USD per share)	$ 160.97
Purchase price	$ 874