8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of report (Date of earliest event reported): July 30, 2015

T-MOBILE US, INC.

(Exact Name of Registrant as Specified in Charter)

DELAWARE	1-33409	20-0836269
(State or other jurisdiction	(Commission File Number)	(I.R.S. Employer
of incorporation or organization)		Identification No.)

12920 SE 38th Street
Bellevue, Washington	98006-1350
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (425) 378-4000

(Former Name or Former Address, if Changed Since Last Report):

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 2.02 — Results of Operations and Financial Condition

On July 30, 2015, T-Mobile US, Inc. issued a press release announcing the financial and operating results for T-Mobile US, Inc. for the quarter ended June 30, 2015. The text of the press release and accompanying financial information are attached as exhibits and incorporated herein by reference.

Item 9.01 — Financial Statements and Exhibits

The following exhibits are furnished as part of this report:

(d) Exhibits:

Exhibit	Description
99.1	Press release, dated July 30, 2015, entitled "T-Mobile Reports Double-Digit Revenue Growth and Strong Profitability in Q2"
99.2	Investor Factbook of T-Mobile US, Inc. Second Quarter 2015 Results

SIGNATURE

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 hereunto duly authorized.

	T-MOBILE US, INC.
July 30, 2015	/s/ J. Braxton Carter
	J. Braxton Carter Executive Vice President and Chief Financial Officer

EX-99.1

EXHIBIT 99.1

T-Mobile Reports Double-Digit Revenue Growth and Strong Profitability in Q2

14% Revenue Growth and 25% Adjusted EBITDA Growth Year-over-Year in Q2 2015

as Customers Continue to Flock to America’s Un-carrier

Second Quarter 2015 Highlights:

• Continued customer momentum and low churn for the fastest growing wireless company in America:

◦ 2.1 million total net adds - 9^th consecutive quarter of over 1 million

◦ 1.0 million branded postpaid net adds - 4^th consecutive quarter of over 1 million

◦ 760,000 branded postpaid phone net adds - expect to capture all of the industry postpaid phone growth

◦ Continued low branded postpaid phone churn of 1.3% - down 16 bps YoY

◦ T-Mobile ranked highest in the J.D. Power Wireless Customer Care Study

• Strong financial performance with expected industry-leading growth in revenues and Adjusted EBITDA:

◦ $6.1 billion service revenues, up 12% YoY

◦ $8.2 billion total revenues, up 14% YoY

◦ $1.8 billion Adjusted EBITDA, up 25% YoY and 31% QoQ

▪ 30% Adjusted EBITDA margin, up from 26% in 2Q14 and 24% in 1Q15

◦ $361 million net income, up from a loss of $63 million in 1Q15

◦ $0.42 earnings per share, strong improvement from loss per share of $(0.09) in 1Q15

◦ 4% QoQ improvement in branded postpaid phone ARPU, returns to positive sequential growth

▪ Branded postpaid ABPU and ABPA hit record levels

• Continued expansion of the nation’s fastest 4G LTE network:

◦ 290 million POPs covered by 4G LTE - targeting 300 million by year-end 2015

◦ 212 market areas with Wideband LTE - more than 250 market areas targeted by year-end 2015

◦ 141 market areas with 700 MHz A-Block spectrum already deployed

◦ MetroPCS network and customer migration completed, ahead of schedule

▪ 100% of MetroPCS CDMA spectrum re-farmed

• Raising subscriber outlook for 2015 while maintaining Adjusted EBITDA target:

◦ Guidance range for branded postpaid net adds increased to 3.4 to 3.9 million

◦ Maintaining target of $6.8 to $7.2 billion of Adjusted EBITDA

◦ Maintaining target of $4.4 to $4.7 billion of cash capex

◦ Financial guidance excludes any impact of JUMP! On Demand

BELLEVUE, Wash. - July 30, 2015 - T-Mobile US, Inc. (NYSE: TMUS) today reported second quarter 2015 results reflecting continued strong momentum, industry-leading growth, and continued low churn. The Company again outperformed the competition in both customer and financial growth metrics. T-Mobile generated 2.1 million total net customer additions, marking the ninth consecutive quarter that T-Mobile has delivered over one million total net customer additions. Additionally, the Company delivered 14% total revenue growth and 25% growth in adjusted EBITDA compared to the second quarter of 2014.

"While the carriers continue to use gimmicks to confuse consumers, T-Mobile continues to listen to customers and respond with moves that blow them away," said John Legere, President and CEO of T-Mobile. "On top of adding 2.1 million new customers in the second quarter, we delivered 14% year-over-year revenue growth and 25% year-over-year Adjusted EBITDA growth. Overall, I think our results speak for themselves."

Operational and Financial Highlights for the Second Quarter 2015

T-Mobile continued to deliver strong customer growth and ended the second quarter of 2015 with 58.9 million total customers. In the second quarter of 2015, T-Mobile added 2.1 million net new customers, including branded postpaid net customer additions of 1.0 million, comprised of phone net customer additions of 760,000 - expected to be the highest in the U.S. wireless industry once again - and mobile broadband net customer additions of 248,000.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

1

Branded postpaid phone churn was 1.3% in the second quarter of 2015, down 16 basis points year-over-year and essentially flat sequentially. The year-over-year improvement in churn reflects ongoing improvements in the Company’s network, customer service, and the overall value of its offerings in the marketplace, resulting in increased customer satisfaction and loyalty.

T-Mobile’s branded prepaid net customer additions were 178,000 in the second quarter of 2015, which represents a significant improvement both year-over-year and sequentially. Branded prepaid to branded postpaid migrations were 175,000 in the second quarter of 2015, down from 195,000 in the first quarter of 2015.

Total device sales, including both branded postpaid and prepaid customers, were 8.3 million units in the second quarter of 2015, of which total smartphone sales were 7.4 million units.

In addition to strong customer growth, T-Mobile delivered outstanding financial results. In the second quarter of 2015, the Company expects to again report the fastest year-over-year revenue growth in the industry for both service and total revenues. Service revenues for the second quarter of 2015 grew by 12.0% year-over-year, primarily due to rapid growth in the Company’s customer base. On a sequential basis, service revenues grew by 5.6% primarily due to higher branded postpaid phone ARPU and growth in the customer base. Excluding the impacts of the non-cash net revenue deferrals for Data Stash™, service revenues in the second quarter of 2015 increased by 3.7% sequentially.

T-Mobile’s total revenues for the second quarter of 2015 grew by 13.8% year-over-year and 5.2% sequentially. The increase was due to continued growth in both service revenues and equipment revenues, which grew by 19.7% year-over-year and 3.5% sequentially.

Branded postpaid phone Average Revenue per User (ARPU) increased sequentially by 3.8% to $48.19, driven primarily by the impacts of the non-cash net revenue deferrals for Data Stash in the first quarter of 2015. On a year-over-year basis, branded postpaid phone ARPU declined 2.3%. Excluding the impacts of Data Stash, branded postpaid phone ARPU in the second quarter of 2015 increased by 1.0% sequentially.

Branded postpaid Average Billings per User (ABPU) was a record $63.29 in the second quarter of 2015, up 5.9% year-over-year and 3.9% sequentially. The increase was primarily due to growth in Equipment Installment Plan (EIP) billings.

Branded postpaid Average Revenue per Account (ARPA) was $113.50 in the second quarter of 2015, up 6.0% year-over-year and 5.1% sequentially. The increase was due to growth in branded postpaid service revenues as well as an increase in the number of branded postpaid customers per account.

Branded postpaid Average Billings per Account (ABPA) amounted to a record $152.31 in the second quarter of 2015, an increase of 15.6% year-over-year and 5.0% sequentially. The increase was due to growth in EIP billings as well as an increase in the number of branded postpaid customers per account.

Branded prepaid ARPU increased by 1.8% year-over-year and 0.1% sequentially to $37.83.

Adjusted EBITDA for the second quarter of 2015 was $1.8 billion, up 25.2% year-over-year and up 30.9% sequentially. Year-over-year, the increase was primarily due to higher service revenues from growth in the customer base combined with strong cost control, especially in cost of services, partially offset by higher selling, general and administrative (SG&A) expenses. Sequentially, the increase was primarily due to higher service revenues and decreased losses on equipment sales, partially offset by higher SG&A expenses. Excluding the impacts of Data Stash, Adjusted EBITDA in the second quarter of 2015 increased by 21.3% sequentially. The Adjusted EBITDA margin was 30% for the second quarter of 2015, up from 26% in the second quarter of 2014 and 24% in the first quarter of 2015.

Net income amounted to $361 million, a strong improvement from a loss of $63 million in the first quarter of 2015 and down from net income of $391 million in the second quarter of 2014. Earnings per share (EPS) in the second quarter of 2015 was $0.42 compared to EPS of $0.48 in the second quarter of 2014 and a loss per share of $(0.09) in the first quarter of 2015. The year-over-year decrease in net income and EPS was primarily due to gains on disposal of spectrum licenses of $747 million recognized in the second quarter of 2014, partially offset by a decrease in income tax expense primarily due to the impact of income tax benefits for several discrete items recognized in the second quarter of 2015. T-Mobile expects EPS to be positive for all the remaining quarters and the full-year of 2015.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

2

J.D. Power Recognizes T-Mobile for Customer Care

On July 30, 2015, J.D. Power recognized T-Mobile for its leadership in Customer Care Performance, awarding the Company the highest ranking among full service wireless providers in the J.D. Power 2015 Wireless Customer Care Full-Service Study - Volume 2. Regaining the highest ranking reinforces T-Mobile’s track record as an organization with a strong focus and commitment to providing an outstanding customer experience whether you call in, come in to the store, or access online.

Un-Carrier Delivering Results

Since launching Un-carrier™ in 2013, T-Mobile has disrupted the wireless industry with innovations such as no annual service contracts, equipment installment plans, the JUMP!^® device upgrade program, free international data roaming, Contract Freedom™, T-Mobile Test Drive™, Music Freedom™, Wi-Fi Un-leashed, Data Stash, and Business Un-leashed. Over the past month, the Company introduced a series of Un-carrier Amped announcements that extend the lineup with:

• JUMP! On Demand: T-Mobile updated its JUMP! program to enable customers to have a low monthly payment that covers the cost of leasing a new device and the freedom to swap it for a new one up to three times in twelve months with no extra fee.

• Mobile without Borders: T-Mobile’s Simple Choice plan now extends coverage and calling across the United States, Canada and Mexico at no extra charge. The upgrade makes Simple Choice the first and only wireless plan to span the entire continent.

• 10 GB for All: T-Mobile updated its Family Plan program to enable qualifying family plan customers to get 10 GB of 4G LTE data at a great rate. Plans start at $100 per month for two lines, each with up to 10 GB of 4G LTE data, and each additional line is $20 per month. For a limited time, the fourth line is free.

• Amping Music Freedom and iPhone^®: T-Mobile updated its Music Freedom program by adding Apple Music to its list of services that stream free on T-Mobile. In addition, every customer who gets a new iPhone 6 with JUMP! On Demand™ this summer can lock in the promotional price of $15 per month and simply swap it for the next comparable iPhone, if they upgrade before the end of the year. Lastly, all customers who get a new iPhone 6 with JUMP! On Demand will have exclusive priority access among T-Mobile’s customers to the next iPhone.

Network Expansion and Capital Expenditures

T-Mobile’s 4G LTE network - America’s Fastest - now covers 290 million people and the Company is targeting coverage of 300 million people by year-end 2015. T-Mobile is rapidly deploying Wideband LTE, while at the same time rolling out 4G LTE on its 700 MHz A-Block and 1900 MHz PCS spectrum. Wideband LTE is currently available in 212 market areas and is expected to be available in more than 250 market areas by year-end 2015. The Company continues to deploy its 700 MHz A-Block spectrum with major market launches in Miami, Denver, Baltimore, Kansas City, Austin, and West Palm Beach during the second quarter of 2015, bringing the overall total to 141 market areas.

Cash capital expenditures reflect T-Mobile’s continued investment in the expansion of its 4G LTE network. In the second quarter of 2015, cash capital expenditures were $1.2 billion, up from $982 million in the first quarter of 2015 and $940 million in the second quarter of 2014.

MetroPCS Combination

On July 1, 2015, T-Mobile decommissioned the CDMA portion of the MetroPCS networks in Dallas, New York, Miami, and the remaining Florida markets, officially completing the shutdown of the MetroPCS CDMA network. 100% of the MetroPCS spectrum has now been re-farmed and integrated into the T-Mobile network.

Total decommissioning costs for the CDMA network shutdowns amounted to $34 million in the second quarter of 2015. The Company expects to incur additional network decommissioning costs in the range of $350 to $450 million with substantially all the costs to be recognized throughout the rest of 2015.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

3

2015 Outlook Guidance

T-Mobile expects to drive further customer momentum while delivering strong growth in Adjusted EBITDA. With the success of its Simple Choice plan and the continued evolution of the Un-carrier strategy, branded postpaid net customer additions for 2015 are now expected to be between 3.4 and 3.9 million, an increase from the previous guidance range of 3.0 to 3.5 million.

For the full-year of 2015, T-Mobile expects Adjusted EBITDA to be in the range of $6.8 to $7.2 billion, unchanged from previous guidance despite the increase in branded postpaid net customer additions guidance.

Cash capital expenditures for 2015 are expected to be in the range of $4.4 to $4.7 billion, also unchanged from previous guidance.

T-Mobile’s financial guidance for 2015 excludes any benefit from the impact of JUMP! On Demand. The Company intends to disclose the aggregate non-cash impact from JUMP! On Demand and Data Stash in future quarters. In the second quarter of 2015, there were no significant impacts to financial results from JUMP! On Demand and Data Stash.

Quarterly Financial Results

For more details on T-Mobile’s second quarter 2015 financial results, including the Investor Factbook with detailed financial tables and reconciliations of certain non-GAAP measures disclosed in this release to the most comparable measures under GAAP, please visit T-Mobile US, Inc.'s Investor Relations website at http://investor.t-mobile.com.

T-Mobile Social Media

Investors and others should note that the Company announces material financial and operational information to its investors using its investor relations website, press releases, SEC filings and public conference calls and webcasts. The Company also intends to use the @TMobileIR Twitter account (https://twitter.com/TMobileIR) and the @JohnLegere Twitter (https://twitter.com/JohnLegere) and Periscope accounts, which Mr. Legere also uses as a means for personal communications and observations, as means of disclosing information about the Company and its services and for complying with its disclosure obligations under Regulation FD. 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 the Company’s press releases, SEC filings and public conference calls and webcasts. The social media channels that the Company intends to use as a means of disclosing the information described above may be updated from time to time as listed on the Company’s investor relations website.

About T-Mobile US, Inc.:

As America's Un-carrier, T-Mobile US, Inc. (NYSE: TMUS) is redefining the way consumers and businesses buy wireless services through leading product and service innovation. The Company's advanced nationwide 4G LTE network delivers outstanding wireless experiences to approximately 59 million customers who are unwilling to compromise on quality and value. Based in Bellevue, Washington, T-Mobile US provides services through its subsidiaries and operates its flagship brands, T-Mobile and MetroPCS. For more information, please visit http://www.t-mobile.com.

Q2 2015 Earnings Call, Livestream and Webcast Access Information

Access via Phone (audio only):

Date:	Thursday, July 30, 2015
Time:	11:00 a.m. (EDT)
Call-in Numbers:	800-432-9830
International:	719-234-7318
Participant Passcode:	1978931

Please plan on accessing the earnings call ten minutes prior to the scheduled start time.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

4

Access via Social Media:

Embedded livestream on Twitter handle: @TMobileIR

Submit Questions via Text or Twitter:

Text:	Send a text message to 313131, enter the keyword TMUS followed by a space
Twitter:	Send a tweet to @TMobileIR using #TMUSearnings

Access via Webcast:

The earnings call will be broadcast live via the Company's Investor Relations website at http://investor.t-mobile.com. A replay of the earnings call will be available for two weeks starting shortly after the call concludes and can be accessed by dialing 888-203-1112 (toll free) or 719-457-0820 (international). The passcode required to listen to the replay is 1978931.

To automatically receive T-Mobile financial news by e-mail, please visit the T-Mobile Investor Relations website, http://investor.t-mobile.com, and subscribe to E-mail Alerts.

Forward-Looking Statements

This news release includes "forward-looking statements" within the meaning of the U.S. federal securities laws. Any statements made herein that are not statements of historical fact, including statements about T-Mobile US, Inc.'s plans, outlook, beliefs, opinion, projections, guidance, strategy, integration of MetroPCS, expected network modernization and other advancements, are forward-looking statements. Generally, forward-looking statements may be identified by words such as "anticipate," "expect," "suggests," "plan," “project,” "believe," "intend," "estimates," "targets," "views," "may," "will," "forecast," and other similar expressions. The forward-looking statements speak only as of the date made, are based on current assumptions and expectations, and involve a number of risks and uncertainties. Important factors that could affect future results and cause those results to differ materially from those expressed in the forward-looking statements include, among others, the following: our ability to compete in the highly competitive U.S. wireless telecommunications industry; adverse conditions in the U.S. and international economies and markets; significant capital commitments and the capital expenditures required to effect our business plan; our ability to adapt to future changes in technology, enhance existing offerings, and introduce new offerings to address customers' changing demands; changes in legal and regulatory requirements, including any change or increase in restrictions on our ability to operate our network; our ability to successfully maintain and improve our network, and the possibility of incurring additional costs in doing so; major equipment failures; severe weather conditions or other force majeure events; and other risks described in our filings with the Securities and Exchange Commission, including those described in our Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 19, 2015. You should not place undue reliance on these forward-looking statements. We do not undertake to update forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Press Contact:	Investor Relations Contact:
Media Relations	Nils Paellmann
T-Mobile US, Inc.	T-Mobile US, Inc.
mediarelations@T-Mobile.com	877-281-TMUS or 212-358-3210
http://newsroom.t-mobile.com	investor.relations@T-Mobile.com
	http://investor.t-mobile.com

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

5

T-MOBILE US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures

(Unaudited)

This Press Release includes non-GAAP financial measures. The non-GAAP financial measures should be considered in addition to, but not as a substitute for, the information provided in accordance with GAAP. T-Mobile believes the non-GAAP financial measures facilitate key operating performance comparisons with other companies in the wireless industry to provide management, investors, and analysts with useful information to assess and evaluate past performance and assist in forecasting future performance. Reconciliations for the non-GAAP financial measures to the most directly comparable GAAP financial measures are provided below.

Adjusted EBITDA is reconciled to net income (loss) as follows:

	Quarter																		Six Months Ended June 30,
(in millions)	Q1 2014			Q2 2014			Q3 2014			Q4 2014			Q1 2015			Q2 2015			2014			2015
Net income (loss)	$	(151	)	$	391		$	(94	)	$	101		$	(63	)	$	361		$	240		$	298
Adjustments:
Interest expense to affiliates	18			85			83			92			64			92			103			156
Interest expense	276			271			260			266			261			257			547			518
Interest income	(75		)	(83		)	(97		)	(104		)	(112		)	(114		)	(158		)	(226		)
Other expense (income), net	6			12			14			(21		)	8			(1		)	18			7
Income tax expense (benefit)	(102		)	286			(117		)	99			(41		)	2			184			(39		)
Operating income (loss)	(28		)	962			49			433			117			597			934			714
Depreciation and amortization	1,055			1,129			1,138			1,090			1,087			1,075			2,184			2,162
Cost of MetroPCS business combination	12			22			97			168			128			34			34			162
Stock based compensation	49			63			45			54			56			71			112			127
Gains on disposal of spectrum licenses (1)	—			(731		)	11			—			—			—			(731		)	—
Other, net	—			6			6			6			—			40			6			40
Adjusted EBITDA	$	1,088		$	1,451		$	1,346		$	1,751		$	1,388		$	1,817		$	2,539		$	3,205

(1) Gains on disposal of spectrum licenses may not agree to the Condensed Consolidated Statements of Comprehensive Income (Loss) primarily due to certain routine operating activities, such as insignificant or routine spectrum license exchanges that would be expected to reoccur, and are therefore included in Adjusted EBITDA.

Adjusted EBITDA - Earnings before interest expense (net of interest income), tax, depreciation, amortization, stock-based compensation and expenses not reflective of T-Mobile's ongoing operating performance. Adjusted EBITDA margin is Adjusted EBITDA divided by service revenues. Adjusted EBITDA is a non-GAAP financial measure utilized by T-Mobile's management to monitor the financial performance of its operations. T-Mobile uses Adjusted EBITDA internally as a metric to evaluate and compensate its personnel and management for their performance, and as a benchmark to evaluate T-Mobile's operating performance in comparison to its competitors. Management also uses Adjusted EBITDA to measure its ability to provide cash flows to meet future debt service, capital expenditures and working capital requirements, and to fund future growth. T-Mobile believes analysts and investors use Adjusted EBITDA as a supplemental measure to evaluate overall operating performance and facilitate comparisons with other wireless communications companies. Adjusted EBITDA has limitations as an analytical tool and should not be considered in isolation or as a substitute for income from operations, net income, or any other measure of financial performance reported in accordance with GAAP.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

6

T-Mobile US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures (continued)

(Unaudited)

The following tables illustrate the calculation of ARPA and ABPA and reconcile these measures to the related service revenues, which we consider to be the most directly comparable GAAP financial measure to ARPA and ABPA:

	Quarter												Six Months Ended June 30,
(in millions, except average number of accounts, ARPA and ABPA)	Q1 2014		Q2 2014		Q3 2014		Q4 2014		Q1 2015		Q2 2015		2014		2015
Calculation of Branded Postpaid ARPA
Branded postpaid service revenues	$	3,447	$	3,511	$	3,670	$	3,764	$	3,774	$	4,075	$	6,958	$	7,849
Divided by: Average number of branded postpaid accounts (in thousands) and number of months in period	10,543		10,928		11,141		11,421		11,645		11,966		10,736		11,806
Branded postpaid ARPA	$	108.97	$	107.11	$	109.80	$	109.87	$	108.04	$	113.50	$	108.02	$	110.81
Calculation of Branded Postpaid ABPA
Branded postpaid service revenues	$	3,447	$	3,511	$	3,670	$	3,764	$	3,774	$	4,075	$	6,958	$	7,849
Add: EIP billings	657		810		967		1,162		1,292		1,393		1,467		2,685
Total billings for branded postpaid customers	$	4,104	$	4,321	$	4,637	$	4,926	$	5,066	$	5,468	$	8,425	$	10,534
Divided by: Average number of branded postpaid accounts (in thousands) and number of months in period	10,543		10,928		11,141		11,421		11,645		11,966		10,736		11,806
Branded postpaid ABPA	$	129.74	$	131.81	$	138.73	$	143.79	$	145.03	$	152.31	$	130.79	$	148.72

Average Revenue Per Account (ARPA) - Average monthly branded postpaid service revenue earned per account. Branded postpaid service revenues for the specified period divided by the average number of branded postpaid accounts during the period, further divided by the number of months in the period. T-Mobile considers branded postpaid ARPA to be indicative of its revenue growth potential given the increase in the average number of branded postpaid phone customers per account and increased penetration of mobile broadband devices.

Average Billings Per Account (ABPA) - Average monthly branded postpaid service revenue earned from customers plus equipment installment plan (EIP) billings divided by the average number of branded postpaid accounts during the period, further divided by the number of months in the period. T-Mobile believes average branded postpaid customer billings per account is indicative of estimated cash collections, including equipment installments, from T-Mobile's customers each month on a per account basis.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

7

T-Mobile US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures (continued)

(Unaudited)

The following tables illustrate the calculation of ARPU and ABPU and reconcile these measures to the related service revenues, which we consider to be the most directly comparable GAAP financial measure to ARPU and ABPU:

	Quarter																		Six Months Ended June 30,
(in millions, except average number of customers, ARPU and ABPU)	Q1 2014			Q2 2014			Q3 2014			Q4 2014			Q1 2015			Q2 2015			2014			2015
Calculation of Branded Postpaid Phone ARPU
Branded postpaid service revenues	$	3,447		$	3,511		$	3,670		$	3,764		$	3,774		$	4,075		$	6,958		$	7,849
Less: Branded postpaid mobile broadband revenues	(47		)	(54		)	(68		)	(92		)	(109		)	(135		)	(101		)	(244		)
Branded postpaid phone service revenues	$	3,400		$	3,457		$	3,602		$	3,672		$	3,665		$	3,940		$	6,857		$	7,605
Divided by: Average number of branded postpaid phone customers (in thousands) and number of months in period	22,447			23,368			24,091			25,359			26,313			27,250			22,908			26,781
Branded postpaid phone ARPU	$	50.48		$	49.32		$	49.84		$	48.26		$	46.43		$	48.19		$	49.89		$	47.33
Calculation of Branded Postpaid ABPU
Branded postpaid service revenues	$	3,447		$	3,511		$	3,670		$	3,764		$	3,774		$	4,075		$	6,958		$	7,849
Add: EIP billings	657			810			967			1,162			1,292			1,393			1,467			2,685
Total billings for branded postpaid customers	$	4,104		$	4,321		$	4,637		$	4,926		$	5,066		$	5,468		$	8,425		$	10,534
Divided by: Average number of branded postpaid customers (in thousands) and number of months in period	22,975			24,092			25,095			26,572			27,717			28,797			23,533			28,257
Branded postpaid ABPU	$	59.54		$	59.79		$	61.59		$	61.80		$	60.94		$	63.29		$	59.67		$	62.14
Calculation of Branded Prepaid ARPU
Branded Prepaid Service Revenues	$	1,648		$	1,736		$	1,790		$	1,812		$	1,842		$	1,861		$	3,384		$	3,703
Divided by: Average number of branded prepaid customers (in thousands) and number of months in period	15,221			15,569			15,875			16,097			16,238			16,396			15,395			16,317
Branded prepaid ARPU	$	36.09		$	37.16		$	37.59		$	37.51		$	37.81		$	37.83		$	36.63		$	37.82

Average Revenue Per User (ARPU) - Average monthly service revenue earned from customers. Service revenues for the specified period divided by the average customers during the period, further divided by the number of months in the period.

Branded postpaid phone ARPU excludes mobile broadband customers and related revenues.

Average Billings per User (ABPU) - Average monthly branded postpaid service revenue earned from customers plus EIP billings divided by the average branded postpaid customers during the period, further divided by the number of months in the period. T-Mobile believes branded postpaid ABPU is indicative of estimated cash collections, including equipment installments, from T-Mobile's customers each month.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

8

T-Mobile US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures (continued)

(Unaudited)

Net debt (excluding Tower Obligations) to last twelve months adjusted EBITDA ratio is calculated as follows:

	Three Months Ended
(in millions, except net debt ratio)	Mar 31, 2014			Jun 30, 2014			Sep 30, 2014			Dec 31, 2014			Mar 31, 2015			Jun 30, 2015
Short-term debt	$	151		$	272		$	1,168		$	87		$	467		$	386
Long-term debt to affiliates	5,600			5,600			5,600			5,600			5,600			5,600
Long-term debt	14,331			14,369			16,284			16,273			16,261			16,386
Less: Cash and cash equivalents	(5,471		)	(3,080		)	(5,787		)	(5,315		)	(3,032		)	(2,642		)
Net Debt (excluding Tower Obligations)	$	14,611		$	17,161		$	17,265		$	16,645		$	19,296		$	19,730
Divided by: Last twelve months Adjusted EBITDA (1)	$	4,936		$	5,122		$	5,124		$	5,636		$	5,936		$	6,302
Net Debt (excluding Tower Obligations) to Last Twelve Months Adjusted EBITDA Ratio	3.0			3.4			3.4			3.0			3.3			3.1

(1) March 31, 2014 Adjusted EBITDA for the last twelve months includes Pro Forma combined results from Q2 2013 to reflect the results of MetroPCS prior to the business combination.

Net debt - Short-term debt, long-term debt to affiliates, and long-term debt (excluding tower obligations), less cash and cash equivalents.

Free cash flow and adjusted free cash flow are calculated as follows:

	Quarter																		Six Months Ended June 30,
(in millions)	Q1 2014			Q2 2014			Q3 2014			Q4 2014			Q1 2015			Q2 2015			2014			2015
Net cash provided by operating activities	$	759		$	970		$	1,062		$	1,355		$	489		$	1,161		$	1,729		$	1,650
Cash purchases of property and equipment	(947		)	(940		)	(1,131		)	(1,299		)	(982		)	(1,191		)	(1,887		)	(2,173		)
Free Cash Flow	(188		)	30			(69		)	56			(493		)	(30		)	(158		)	(523		)
MetroPCS CDMA network decommissioning payments	9			5			15			52			71			103			14			174
Adjusted Free Cash Flow	$	(179	)	$	35		$	(54	)	$	108		$	(422	)	$	73		$	(144	)	$	(349	)

Free Cash Flow - Net cash provided by operating activities less cash capital expenditures for property and equipment. Free Cash Flow is utilized by T-Mobile's management, investors, and analysts to evaluate cash available to pay debt and provide further investment in the business. The reconciliation of Free Cash Flow to net cash provided by operating activities is detailed in the Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures schedule.

Adjusted Free Cash Flow - Free Cash Flow excluding decommissioning payments related to the shutdown of the CDMA portion of the MetroPCS network.

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, Washington 98006

Phone 1-800-318-9270

Internet http://www.T-Mobile.com

9

EX-99.2

EXHIBIT 99.2

1

2

CUSTOMER METRICS

Branded Postpaid Customers

▪ Branded postpaid net customer additions were 1,008,000 in the second quarter of2015 compared to 1,125,000 in the first quarter of2015 and 908,000 in the second quarter of2014. This marked the fourth consecutive quarter in which branded postpaid net customer additions were greater than one million, a clear indicator of the continued success of the Un-carrier initiatives and strong uptake of promotions for services and devices.

▪ T-Mobile is expected to again lead the industry in branded postpaid phone net customer additions with 760,000 in the second quarter of2015, compared to 991,000 in the first quarter of2015 and 579,000 in the second quarter of2014. Branded postpaid phone gross additions in the second quarter of2015 declined by 9% on a sequential basis, but were up 9% year-over-year. T-Mobile is expected to have captured all of the industry’s postpaid phone growth in the second quarter of2015.

▪ Branded postpaid mobile broadband net customer additions were 248,000 in the second quarter of2015, compared to 134,000 in the first quarter of2015 and 329,000 in the second quarter of2014.

▪ Branded postpaid phone churn was 1.32% in the second quarter of2015, down 16 basis points compared to 1.48% in the second quarter of2014 and up two basis points compared to 1.30% in the first quarter of2015. The year-over-year improvement reflects ongoing improvements in the Company’s network, customer service, and the overall value of its offerings in the marketplace, resulting in increased customer satisfaction and loyalty.

3

Branded Prepaid Customers

▪ Branded prepaid net customer additions were 178,000 in the second quarter of2015, compared to 73,000 in the first quarter of2015 and 102,000 in the second quarter of2014. The higher level of branded prepaid net customer additions in the second quarter of2015 was driven by successful promotions for services and devices and slightly lower sequential customer migrations from branded prepaid to branded postpaid.

▪ Migrations to branded postpaid plans reduced branded prepaid net customer additions in the second quarter of2015 by approximately 175,000, down from 195,000 in the first quarter of2015 and up from 85,000 in the second quarter of2014.

▪ Branded prepaid churn was 4.93% in the second quarter of2015, up 31 basis points from 4.62% in the first quarter of2015 and up 43 basis points from 4.50% in the second quarter of2014. Sequentially and year-over-year, the increase in churn was principally due to ongoing competitive activity in the marketplace.

Total Branded Customers

▪ Total branded net customer additions were 1,186,000 in the second quarter of2015 compared to 1,198,000 in the first quarter of2015 and 1,010,000 in the second quarter of2014. This was the sixth consecutive quarter in which branded net customer additions surpassed the one million milestone.

4

Wholesale Customers

▪ Total wholesale net customer additions were 886,000 in the second quarter of2015 compared to 620,000 in the first quarter of2015 and 460,000 in the second quarter of2014.

▪ MVNO net customer additions were 919,000 in the second quarter of2015 compared to 479,000 in the first quarter of2015 and 235,000 in the second quarter of2014.

▪ M2M net customer losses were 33,000 in the second quarter of2015 compared to net customer additions of 141,000 in the first quarter of2015 and 225,000 in the second quarter of2014.

Total Customers

▪ Total net customer additions were 2,072,000 in the second quarter of2015 compared to 1,818,000 in the first quarter of2015 and 1,470,000 in the second quarter of2014. This was the ninth consecutive quarter in which total net customer additions exceeded one million. It was also the fourth time in the last six quarters in which total net customer additions exceeded two million.

▪ Since the launch of its first Un-carrier initiative nine quarters ago, T-Mobile has added more than 16 million total customers.

▪ T-Mobile ended the second quarter of2015 with more than 58.9 million total customers.

5

NETWORK

Network Modernization Update

▪ T-Mobile’s 4G LTE network now covers 290 million people, up from 275 million at the end of the first quarter of2015 and 233 million at the end of the second quarter of2014.

▪ The Company is targeting a total 4G LTE population coverage of 300 million people by year-end 2015. During 2015, the Company expects to add one million square miles of territory under its 4G LTE coverage.

▪ Wideband LTE, which refers to markets that have bandwidth of at least 15+15 MHz dedicated to 4G LTE, is currently available in 212 market areas and is now expected to be available in more than 250 market areas by year-end 2015. Customers in Wideband LTE markets are regularly observing peak speeds in the 70 Mbps range, with maximum real-world speeds in excess of 145 Mbps.

Network Speed

▪ T-Mobile has the fastest nationwide 4G LTE network in the U.S. based on download speeds from millions of user- generated tests. This is the sixth consecutive quarter that T-Mobile has led the industry in average download speeds.

▪ In the second quarter of2015, T-Mobile’s average 4G LTE download speed was 18.5 Mbps compared to Verizon at 18.2 Mbps, AT&T at 14.8 Mbps, and Sprint at 10.6 Mbps.

6

Spectrum

▪ At the end of the second quarter of2015, T-Mobile owned an average of 84 MHz of spectrum across the top 25 markets in the U.S. The spectrum is comprised of an average of 10 MHz in the 700 MHz band, 30 MHz in the 1900 MHz PCS band, and 44 MHz in the AWS band.

▪ The Company expects to participate in future FCC spectrum auctions including the broadcast incentive auction.

7

A-Block Update

▪ T-Mobile owns 700 MHz A-Block spectrum covering 190 million people or approximately 60% of the U.S. population and approximately 70% of the Company’s existing branded customer base. The spectrum covers 9 of the top 10 market areas and 24 of the top 30 market areas in the U.S.

▪ Approximately 98% of the population covered by the Company’s A-Block spectrum is free and clear and ready to be deployed or will be ready for deployment in 2015. That is up from approximately 50% at the time of the original A-Block spectrum purchase from Verizon in the first quarter of 2014.

▪ T-Mobile has deployed its 700 MHz A-Block spectrum in 141 market areas. New launches in the second quarter of2015 included the cities of Miami, Denver, Baltimore, Kansas City, Austin, and West Palm Beach. The Company plans to continue to aggressively roll-out new 700 MHz sites with new launches planned for Los Angeles, New York, Atlanta, Seattle, Portland, and Sacramento in 2015, among others.

8

METROPCS

▪ On July 1, 2015, T-Mobile officially completed the shutdown of the MetroPCS CDMA network with the decommissioning of the CDMA portion of the MetroPCS networks in Dallas, New York, Miami, Jacksonville, Orlando, and Tampa. Since the close of the business combination in May 2013, nearly 9 million legacy MetroPCS customers have been migrated to the T-Mobile network.

▪ 100% of the MetroPCS spectrum on a MHz/POP basis has now been re-farmed and integrated into the T-Mobile network, compared to 80% at the end of the first quarter of2015.

▪ Total decommissioning costs for CDMA network shutdowns were $34 million in the second quarter of2015, compared to $128 million in total decommissioning costs in the first quarter of2015. The sequential decrease in total decommissioning costs was primarily due to the timing of the CDMA network shutdowns. Typically, there is a lag of approximately 3 to 6 months between network shutdown and the recognition of decommissioning costs and realization of synergies.

▪ The Company expects to incur additional network decommissioning costs in the range of $350 to $450 millionwith substantially all the costs to be recognized through the rest of 2015. Network decommissioning costs primarily relate to the acceleration of lease costs for decommissioned cell sites and are excluded from Adjusted EBITDA.

9

UN-CARRIER INITIATIVES

▪ At the end of the second quarter of2015, 93% of the branded postpaid customer base was on a Simple Choice plan, up from 92% at the end of the first quarter of2015 and 80% at the end of the second quarter of2014.

▪ At the end of the second quarter of2015, 11.3 million customers were enrolled in the JUMP! program, up from 10.3 million at the end of the first quarter of2015 and 6.7 million at the end of the second quarter of2014.

Un-carrier Updates

▪ JUMP! On Demand: On June 28, 2015, T-Mobile updated its JUMP! program to enable customers to have a low monthly payment that covers the cost of leasing a new device plus the freedom to swap their leased device for a new one up to three times in twelve months with no extra fee. Under this program, at lease inception, devices are transferred from inventory to property and equipment. Devices are then depreciated to their estimated residual value. Revenues associated with the leased devices are recognized over the term of the lease.

▪ Mobile without Borders: This program, launched on July 15, 2015, expands the benefits of T-Mobile’s Simple Choice plan by extending coverage and calling across the U.S, Canada, and Mexico at no extra charge. The upgrade makes Simple Choice the first and only wireless plan to span the entire continent.

▪ 10 GB for All: On July 15, 2015, T-Mobile updated its Family Plan program to enable qualifying family plan customers to get 10 GB of 4G LTE data at a great rate. Plans start at $100 per month for two lines each with up to 10 GB of 4G LTE data and each additional line is $20 per month. For a limited time, the fourth line is free.

▪ Amping Music Freedom and iPhone^®: On July 28, 2015, T-Mobile updated its Music Freedom program by adding Apple Music to its list of services that stream free on T-Mobile. In addition, every customer who gets a new iPhone 6 with JUMP! On Demand™ this summer can lock in the promotional price of $15 per month and simply swap it for the next comparable iPhone, if they upgrade before the end of the year. Lastly, all customers who get a new iPhone 6 with JUMP! On Demand will have exclusive priority access among T-Mobile’s customers to the next iPhone.

10

DEVICES

▪ Total device sales were 8.3 million units in the second quarter of2015 compared to 8.8 million units in the first quarter of2015 and 6.9 million units in the second quarter of2014.

▪ Total smartphone sales were 7.4 million units in the second quarter of2015 compared to 8.0 million units in the first quarter of2015 and 6.2 million units in the second quarter of2014.

▪ The upgrade rate for branded postpaid customers was approximately 9% in the second quarter of2015 compared to approximately 8% in the first quarter of2015 and approximately 8% in the second quarter of2014.

11

EQUIPMENT INSTALLMENT PLANS (EIP)

▪ T-Mobile financed $1.697 billion of equipment sales on EIP in the second quarter of2015, up 14.4% from $1.483 billion in the first quarter of2015 and up 26.5% from $1.342 billion in the second quarter of2014. The sequential and year-over-year increase was due to higher gross customer additions, growth in devices financed through EIP, including customers choosing to JUMP!, and a higher average price per device sold.

▪ Customers on Simple Choice plans had associated EIP billings of $1.393 billion in the second quarter of2015, up 7.8% from $1.292 billion in the first quarter of2015 and up 72.0% from $810 million in the second quarter of2014.

▪ Total EIP receivables, net of imputed discount and allowances for credit losses, were $5.114 billion at the end of the second quarter of2015 compared to $4.842 billion at the end of the first quarter of2015 and $3.583 billion at the end of the second quarter of2014. The $272 million sequential increase in total EIP receivables, net in the second quarter of2015 was higher than the sequential increase of $152 million in the first quarter of2015, and reflects growth in devices financed through EIP.

▪ The Company continues to expect that the growth in total EIP receivables, net will moderate significantly in 2015 compared to 2014.

12

CUSTOMER QUALITY

▪ EIP receivables classified as Prime were 52% of total EIP receivables at the end of the second quarter of2015, flat from the prior quarter and down one percentage point compared to the end of the second quarter of2014.

▪ Total bad debt expense and losses from the factoring arrangement was $156 million in the second quarter of2015 compared to $169 million in the first quarter of2015 and $164 million in the second quarter of2014. Year-over-year, total bad debt expense and losses from the factoring arrangement as a percentage of total revenues decreased 37 basis points. Sequentially, total bad debt expense and losses from the factoring arrangement as a percentage of total revenues decreased 26 basis points, primarily due to a non-recurring impact from a change to the factoring arrangement in the first quarter of 2015.

13

REVENUE METRICS

Branded Postpaid Phone ARPU

▪ Branded postpaid phone ARPU was $48.19 in the second quarter of2015, up 3.8% from $46.43 in the first quarter of2015 and down 2.3% from $49.32 in the second quarter of2014. Sequentially, the increase in branded postpaid phone ARPU was primarily due to the non-cash net revenue deferrals for Data Stash recognized in the first quarter of2015. Year-over-year, the decrease was primarily due to dilution from continued growth of customers on Simple Choice plans and promotions targeting multiple phone lines, including the “4 for $100” offer.

▪ Excluding the impacts of the non-cash net revenue deferrals for Data Stash, branded postpaid phone ARPU increased 1.0% sequentially.

Branded Postpaid ABPU

▪ Branded postpaid ABPU was a record $63.29 in the second quarter of2015, up 3.9% from $60.94 in the first quarter of2015 and up 5.9% from $59.79 in the second quarter of2014. Sequentially, the increase in branded postpaid ABPU was primarily due to the non-cash net revenue deferrals for Data Stash recognized in the first quarter of2015 and growth in EIP billings on a per user basis. Year-over-year, the increase was primarily due to growth in EIP billings on a per user basis, offset in part by lower branded postpaid phone ARPU.

▪ Excluding the impacts of the non-cash net revenue deferrals for Data Stash, branded postpaid ABPU increased 1.7% sequentially.

14

Branded Postpaid Customers per Account

▪ Branded postpaid customers per account was 2.43 at the end of the second quarter of2015, compared to 2.39 at the end of the first quarter of2015 and 2.23 at the end of the second quarter of2014. The sequential and year-over-year increase was primarily a result of service promotions targeting multiple phone lines, including the “4 for $100” offer, and increased penetration of mobile broadband devices.

Branded Postpaid ARPA

▪ Branded postpaid ARPA was $113.50 in the second quarter of2015, up 5.1% from $108.04 in the first quarter of2015 and up 6.0% from $107.11 in the second quarter of2014. Sequentially, the increase in branded postpaid ARPA was primarily due to the non-cash net revenue deferrals for Data Stash recognized in the first quarter of2015 and an increase in the number of branded postpaid customers per account. Year-over-year, the increase was primarily due to higher regulatory program revenues and an increase in the number of branded postpaid customers per account, partially offset by dilution from continued growth of customers on promotions targeting multiple phone lines, including the “4 for $100” offer.

▪ Excluding the impacts of the non-cash net revenue deferrals for Data Stash, branded postpaid ARPA increased 2.1% sequentially.

15

Branded Postpaid ABPA

▪ Branded postpaid ABPA was a record $152.31 in the second quarter of2015, up 5.0% from $145.03 in the first quarter of2015 and up 15.6% from $131.81 in the second quarter of2014. Sequentially, the increase in branded postpaid ABPA was primarily due to the non-cash net revenue deferrals for Data Stash recognized in the first quarter of2015, growth in EIP billings, and an increase in the number of branded postpaid customers per account. Year-over-year, the increase was primarily due to growth in EIP billings and an increase in the number of branded postpaid customers per account.

▪ Excluding the impacts of the non-cash net revenue deferrals for Data Stash, branded postpaid ABPA increased 2.8% sequentially.

Branded Prepaid ARPU

▪ Branded prepaid ARPU was $37.83 in the second quarter of2015, essentially flat from $37.81 in the first quarter of2015 and up 1.8% from $37.16 in the second quarter of2014. Year-over-year, the increase in branded prepaid ARPU was primarily due to an increase in data attach rates.

16

REVENUES

Service Revenues

▪ T-Mobile is expected to again lead the industry in year-over-year service revenue growth in the second quarter of2015. This would mark the fifth consecutive quarter that T-Mobile has led the industry in year-over-year service revenue growth.

▪ Service revenues were $6.144 billion in the second quarter of2015, up 5.6% from $5.819 billion in the first quarter of2015 and up 12.0% from $5.484 billion in the second quarter of2014. The year-over-year service revenue growth of 12.0% was an acceleration in the growth rate of three percentage points compared to the first quarter of2015.

▪ Sequentially, the increase in service revenues was primarily due to growth in the Company’s customer base from the continued success of T-Mobile’s Un-carrier initiatives and strong customer response to promotional activities targeting families as well as the non-cash net revenue deferrals for Data Stash recognized in the first quarter of2015.

▪ Year-over-year, the increase in service revenues was primarily due to growth in the Company’s customer base from the continued success of T-Mobile’s Un-carrier initiatives as well as the success of the MetroPCS brand, partially offset by lower branded postpaid phone ARPU.

▪ Excluding the impacts of the non-cash net revenue deferrals for Data Stash, service revenues increased 3.7% sequentially.

17

Equipment Revenues

▪ Equipment revenues were $1.915 billion in the second quarter of2015, up 3.5% from $1.851 billion in the first quarter of2015 and up 19.7% from $1.600 billion in the second quarter of2014.

▪ Sequentially, the increase in equipment revenues was primarily due to a higher average revenue per device sold, partially offset by a decrease in the number of devices sold.

▪ Year-over-year, the increase in equipment revenues was primarily due to an increase in the number of devices sold, including higher device upgrade volumes.

Total Revenues

▪ T-Mobile is expected to again lead the industry in year-over-year total revenue growth in the second quarter of2015.

▪ Total revenues were $8.179 billion in the second quarter of2015, up 5.2% from $7.778 billion in the first quarter of2015 and up 13.8% from $7.185 billion in the second quarter of2014.

18

OPERATING EXPENSES

Cost of Services

▪ Cost of services was $1.397 billion in the second quarter of2015, essentially flat compared to $1.395 billion in the first quarter of2015 and down 3.9% from $1.453 billion in the second quarter of2014. Sequentially, increases in cost of services due to the network expansion and 700 MHz A-Block build out were largely offset by lower lease expense. The year-over-year decrease was primarily due to network synergies realized from the decommissioning of the MetroPCS CDMA network.

Cost of Equipment Sales

▪ Cost of equipment sales was $2.661 billion in the second quarter of2015, down 0.7% from $2.679 billion in the first quarter of2015 and up 20.1% from $2.215 billion in the second quarter of2014. The sequential decrease was primarily due to a decrease in the number of devices sold, offset in part by a higher average cost per device sold. The year-over-year increase was primarily due to an increase in the number of devices sold, including higher device upgrade volumes.

19

Selling, General and Admin. (“SG&A”) Expenses

▪ SG&A expenses were $2.438 billion in the second quarter of2015, up 2.8% from $2.372 billion in the first quarter of2015 and up 13.3% from $2.151 billion in the second quarter of2014. The sequential and year-over-year increase was primarily due to higher employee-related expenses associated with an increase in the number of retail, administrative and customer support employees to support the growing customer base and higher commissions. Additionally, an increase in promotional costs contributed to the year-over-year increase.

20

ADJUSTED EBITDA

▪ T-Mobile is expected to again lead the industry in year-over-year Adjusted EBITDA growth in the second quarter of2015.

▪ Adjusted EBITDA was $1.817 billion in the second quarter of2015, up 30.9% from $1.388 billion in the first quarter of2015 and up 25.2% from $1.451 billion in the second quarter of2014.

▪ Sequentially, the increase in Adjusted EBITDA was primarily due to higher service revenues from growth in the customer base, decreased losses on equipment sales, and the impact of the non-cash net revenue deferrals for Data Stash recognized in the first quarter of2015, partially offset by higher selling, general and administrative expenses associated with customer growth.

▪ Year-over-year, the increase in Adjusted EBITDA was primarily due to higher service revenues from growth in the customer base and lower cost of services, partially offset by higher selling, general and administrative expenses associated with customer growth.

▪ Adjusted EBITDA in the second quarter of2015 was impacted by the non-cash net revenue deferrals for Data Stash of $3 million, compared to the $112 million non-cash net revenue deferrals in the first quarter of2015. Excluding the impacts of the non-cash net revenue deferrals for Data Stash, Adjusted EBITDA in the second quarter of2015 increased 21.3% sequentially.

▪ Adjusted EBITDA margin was 30% in the second quarter of2015 compared to 24% in the first quarter of2015 and 26% in the second quarter of2014.

21

NET INCOME AND EARNINGS PER SHARE

▪ Net income was $361 million in the second quarter of2015 compared to a net loss of $63 million in the first quarter of2015 and net income of $391 million in the second quarter of2014. The sequential increase in net income was primarily due to higher operating income in the second quarter of 2015. The year-over-year decline was primarily due to gains on disposal of spectrum licenses of $747 million recognized in the second quarter of2014, partially offset by a decrease in income tax expense primarily due to the impact of income tax benefits for discrete items recognized in the second quarter of2015, including recent changes in state and local income tax laws and the recognition of certain federal tax credits.

▪ Earnings per share was $0.42 in the second quarter of2015 compared to a loss per share of $(0.09) in the first quarter of2015 and earnings per share of $0.48 in the second quarter of2014.

▪ T-Mobile expects to report positive earnings per share for all the remaining quarters and the full-year of 2015.

CAPITAL EXPENDITURES

▪ Cash capital expenditures for property and equipment were $1.191 billion in the second quarter of2015 compared to $982 million in the first quarter of2015 and $940 million in the second quarter of2014. The sequential and year-over-year increase was primarily due to the timing of network spend in connection with T-Mobile’s modernization program and the build out for the 4G LTE on the 700 MHz A-Block and 1900 MHz PCS spectrum.

22

FREE CASH FLOW

▪ Beginning in the second quarter of2015, T-Mobile will report Free Cash Flow, which is defined as net cash provided by operating activities less cash capital expenditures, and cease reporting Simple Free Cash Flow, which is defined as Adjusted EBITDA less cash capital expenditures. T-Mobile believes that Free Cash Flow provides a more complete representation of the cash available to pay debt and provide further investment in the business.

▪ Net cash provided by operating activities was $1.161 billion in the second quarter of2015, compared to $489 million in the first quarter of2015 and $970 million in the second quarter of2014.

▪ Free Cash Flow was a loss of $30 millionin the second quarter of2015, compared to a loss of $493 million in the first quarter of2015 and Free Cash Flow of $30 million in the second quarter of2014. Sequentially, the improvement in Free Cash Flow was due to higher operating income and increases from changes in net working capital, partially offset by higher cash capital expenditures. Year-over-year, the decrease was primarily due to decreases from changes in net working capital and higher cash capital expenditures, partially offset by higher operating income.

▪ Adjusted Free Cash Flow was $73 million in the second quarter of2015, compared to a loss of $422 million in the first quarter of2015 and Adjusted Free Cash Flow of $35 million in the second quarter of2014. Adjusted Free Cash Flow excludes decommissioning payments related to the one-time shutdown of the CDMA portion of the MetroPCS network from Free Cash Flow.

▪ The Company continues to expect that Free Cash Flow will be positive for the full-year 2015.

23

CAPITAL STRUCTURE

▪ Net debt, excluding tower obligations, at the end of the second quarter of2015 was $19.7 billion.

▪ Total debt, excluding tower obligations, at the end of the second quarter of2015 was $22.4 billion and was comprised of short-term debt of $0.4 billion, long-term debt to affiliates of $5.6 billion, and long-term debt of $16.4 billion.

▪ The ratio of net debt, excluding tower obligations, to Adjusted EBITDA for the trailing last twelve month (“LTM”) period was 3.1x at the end of the second quarter of2015 compared to 3.3x at the end of the first quarter of2015 and 3.4x at the end of the second quarter of2014.

▪ The Company’s cash position remains strong with $2.6 billion in cash at the end of the second quarter of2015. The cash balance declined in the second quarter of2015 compared to the end of the first quarter of2015 due primarily to a decrease in accounts payable and accrued liabilities related to the timing of vendor payments.

24

GUIDANCE

▪ T-Mobile expects to drive further customer momentum while delivering strong growth in Adjusted EBITDA.

▪ With the success of T-Mobile's Simple Choice plan and the continued evolution of the Un-carrier strategy, branded postpaid net customer additions for full-year 2015 are now expected to be between 3.4 and 3.9 million, an increase from the previous guidance of 3.0 to 3.5 million.

▪ For full-year 2015, T-Mobile expects Adjusted EBITDA to be in the range of $6.8 to $7.2 billion, which is unchanged from previous guidance despite the increase in branded postpaid net customer additions guidance.

▪ Cash capital expenditures for full-year 2015 are expected to be in the range of $4.4 to $4.7 billion, which is unchanged from previous guidance.

▪ T-Mobile’s financial guidance for full-year 2015 excludes any benefit from the impact of JUMP! On Demand. The Company intends to disclose the aggregate non-cash impact from JUMP! On Demand and Data Stash in future quarters. In the second quarter of2015, there were no significant impacts to financial results from JUMP! On Demand and Data Stash.

OTHER EVENTS

J.D. Power Recognizes T-Mobile for Customer Care

▪ On July 30, 2015, J.D. Power recognized T-Mobile for its leadership in Customer Care Performance, awarding the Company the highest ranking among full service wireless providers in the J.D. Power 2015 Wireless Customer Care Full-Service Study - Volume 2. Regaining the highest ranking reinforces T-Mobile’s track record as an organization with a strong focus and commitment to providing an outstanding customer experience whether you call in, come in to the store, or access online.

UPCOMING EVENTS (All dates and attendance tentative)

▪ Oppenheimer 18th Annual Technology, Internet and Communications Conference, August 11-12, 2015, Boston, MA

▪ Goldman Sachs 24th Annual Communacopia Conference, September 16-18, 2015, New York, NY

▪ T-Mobile US, Inc. Q3 2015 Earnings Report, October 28, 2015

25

CONTACT INFORMATION

Press:

Media Relations    

T-Mobile US, Inc.

mediarelations@t-mobile.com

http://newsroom.t-mobile.com

Investor Relations:

Nils Paellmann, nils.paellmann@t-mobile.com

Ben Barrett, ben.barrett@t-mobile.com

Chezzarae Hart, chezzarae.hart@t-mobile.com

Cristal Dunkin, cristal.dunkin@t-mobile.com

877-281-TMUS or 212-358-3210

investor.relations@t-mobile.com

http://investor.t-mobile.com

26

T-Mobile US, Inc.

Condensed Consolidated Balance Sheets

(Unaudited)

(in millions, except share and per share amounts)	June 30, 2015			December 31, 2014
Assets
Current assets
Cash and cash equivalents	$	2,642		$	5,315
Accounts receivable, net of allowances of $91 and $83	1,827			1,865
Equipment installment plan receivables, net	3,503			3,062
Accounts receivable from affiliates	52			76
Inventories	1,135			1,085
Deferred tax assets, net	1,479			988
Other current assets	1,019			1,593
Total current assets	11,657			13,984
Property and equipment, net	16,910			16,245
Goodwill	1,683			1,683
Spectrum licenses	24,272			21,955
Other intangible assets, net	735			870
Equipment installment plan receivables due after one year, net	1,611			1,628
Other assets	320			288
Total assets	$	57,188		$	56,653
Liabilities and Stockholders' Equity
Current liabilities
Accounts payable and accrued liabilities	$	6,645		$	7,364
Current payables to affiliates	101			231
Short-term debt	386			87
Deferred revenue	574			459
Other current liabilities	558			635
Total current liabilities	8,264			8,776
Long-term debt	16,386			16,273
Long-term debt to affiliates	5,600			5,600
Long-term financial obligation	2,526			2,521
Deferred tax liabilities	5,306			4,873
Deferred rents	2,411			2,331
Other long-term liabilities	642			616
Total long-term liabilities	32,871			32,214
Commitments and contingencies
Stockholders' equity
5.50% Mandatory Convertible Preferred Stock Series A, par value $0.00001 per share, 100,000,000 shares authorized; 20,000,000 and 20,000,000 shares issued and outstanding; $1,000 and $1,000 aggregate liquidation value	—			—
Common Stock, par value $0.00001 per share, 1,000,000,000 shares authorized; 816,196,073 and 808,851,108 shares issued, 814,813,568 and 807,468,603 shares outstanding	—			—
Additional paid-in capital	38,595			38,503
Treasury stock, at cost, 1,382,505 and 1,382,505 shares issued	—			—
Accumulated other comprehensive income	1			1
Accumulated deficit	(22,543		)	(22,841		)
Total stockholders' equity	16,053			15,663
Total liabilities and stockholders' equity	$	57,188		$	56,653

27

T-Mobile US, Inc.

Condensed Consolidated Statements of Comprehensive Income (Loss)

(Unaudited)

	Three Months Ended									Six Months Ended June 30,
(in millions, except shares and per share amounts)	June 30, 2015			March 31, 2015			June 30, 2014			2015			2014
Revenues
Branded postpaid revenues	$	4,075		$	3,774		$	3,511		$	7,849		$	6,958
Branded prepaid revenues	1,861			1,842			1,736			3,703			3,384
Wholesale revenues	164			158			172			322			346
Roaming and other service revenues	44			45			65			89			133
Total service revenues	6,144			5,819			5,484			11,963			10,821
Equipment revenues	1,915			1,851			1,600			3,766			3,048
Other revenues	120			108			101			228			191
Total revenues	8,179			7,778			7,185			15,957			14,060
Operating expenses
Cost of services, exclusive of depreciation and amortization shown separately below	1,397			1,395			1,453			2,792			2,917
Cost of equipment sales	2,661			2,679			2,215			5,340			4,501
Selling, general and administrative	2,438			2,372			2,151			4,810			4,247
Depreciation and amortization	1,075			1,087			1,129			2,162			2,184
Cost of MetroPCS business combination	34			128			22			162			34
Gains on disposal of spectrum licenses	(23		)	—			(747		)	(23		)	(757		)
Total operating expenses	7,582			7,661			6,223			15,243			13,126
Operating income	597			117			962			714			934
Other income (expense)
Interest expense to affiliates	(92		)	(64		)	(85		)	(156		)	(103		)
Interest expense	(257		)	(261		)	(271		)	(518		)	(547		)
Interest income	114			112			83			226			158
Other income (expense), net	1			(8		)	(12		)	(7		)	(18		)
Total other expense, net	(234		)	(221		)	(285		)	(455		)	(510		)
Income (loss) before income taxes	363			(104		)	677			259			424
Income tax expense (benefit)	2			(41		)	286			(39		)	184
Net income (loss)	361			(63		)	391			298			240
Dividends on preferred stock	(14		)	(14		)	—			(28		)	—
Net income (loss) attributable to common stockholders	$	347		$	(77	)	$	391		$	270		$	240
Other comprehensive loss, net of tax
Unrealized loss on available-for-sale securities, net of tax effect of $0, $0, $0, $0 and $(1)	—			—			—			—			(3		)
Other comprehensive loss, net of tax	—			—			—			—			(3		)
Total comprehensive income (loss)	$	361		$	(63	)	$	391		$	298		$	237
Earnings (loss) per share
Basic	$	0.43		$	(0.09	)	$	0.49		$	0.33		$	0.30
Diluted	$	0.42		$	(0.09	)	$	0.48		$	0.33		$	0.30
Weighted average shares outstanding
Basic	811,605,031			808,605,526			803,923,913			810,113,564			803,226,194
Diluted	821,122,537			808,605,526			813,556,137			819,548,539			812,903,135

28

T-Mobile US, Inc.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

	Six Months Ended June 30,
(in millions)	2015			2014
Operating activities
Net cash provided by operating activities	$	1,650		$	1,729
Investing activities
Purchases of property and equipment	(2,173		)	(1,887		)
Purchases of spectrum licenses and other intangible assets	(1,844		)	(2,367		)
Other, net	(12		)	(21		)
Net cash used in investing activities	(4,029		)	(4,275		)
Financing activities
Repayments of short-term debt for purchases of inventory, property and equipment, net	(248		)	(231		)
Other, net	(46		)	(34		)
Net cash used in financing activities	(294		)	(265		)
Change in cash and cash equivalents	(2,673		)	(2,811		)
Cash and cash equivalents
Beginning of period	5,315			5,891
End of period	$	2,642		$	3,080

29

T-Mobile US, Inc. Supplementary Operating and Financial Data

	Quarter						Six Months Ended June 30,
(in thousands)	Q1 2014	Q2 2014	Q3 2014	Q4 2014	Q1 2015	Q2 2015	2014	2015
Customers, end of period
Branded postpaid phone customers	23,054	23,633	24,807	25,844	26,835	27,595	23,633	27,595
Branded postpaid mobile broadband customers	568	897	1,102	1,341	1,475	1,723	897	1,723
Total branded postpaid customers	23,622	24,530	25,909	27,185	28,310	29,318	24,530	29,318
Branded prepaid customers	15,537	15,639	16,050	16,316	16,389	16,567	15,639	16,567
Total branded customers	39,159	40,169	41,959	43,501	44,699	45,885	40,169	45,885
M2M customers	3,822	4,047	4,269	4,421	4,562	4,529	4,047	4,529
MVNO customers	6,094	6,329	6,662	7,096	7,575	8,494	6,329	8,494
Total wholesale customers	9,916	10,376	10,931	11,517	12,137	13,023	10,376	13,023
Total customers, end of period	49,075	50,545	52,890	55,018	56,836	58,908	50,545	58,908

	Quarter							Six Months Ended June 30,
(in thousands)	Q1 2014	Q2 2014	Q3 2014	Q4 2014	Q1 2015	Q2 2015		2014	2015
Net customer additions (losses)
Branded postpaid phone customers	1,256	579	1,175	1,037	991	760		1,835	1,751
Branded postpaid mobile broadband customers	67	329	204	239	134	248		396	382
Total branded postpaid customers	1,323	908	1,379	1,276	1,125	1,008		2,231	2,133
Branded prepaid customers	465	102	411	266	73	178		567	251
Total branded customers	1,788	1,010	1,790	1,542	1,198	1,186		2,798	2,384
M2M customers	220	225	222	152	141	(33	)	445	108
MVNO customers	383	235	333	434	479	919		618	1,398
Total wholesale customers	603	460	555	586	620	886		1,063	1,506
Total net customer additions	2,391	1,470	2,345	2,128	1,818	2,072		3,861	3,890

Note: Certain customer numbers may not add due to rounding.

	Quarter												Six Months Ended June 30,
	Q1 2014		Q2 2014		Q3 2014		Q4 2014		Q1 2015		Q2 2015		2014		2015
Branded postpaid phone churn	1.47	%	1.48	%	1.64	%	1.73	%	1.30	%	1.32	%	1.47	%	1.31	%
Branded prepaid churn	4.34	%	4.50	%	4.78	%	5.39	%	4.62	%	4.93	%	4.42	%	4.78	%

30

T-Mobile US, Inc. Supplementary Operating and Financial Data (continued)

	Quarter						Six Months Ended June 30,
	Q1 2014	Q2 2014	Q3 2014	Q4 2014	Q1 2015	Q2 2015	2014	2015
Financial Metrics
Service revenues (in millions)	$5,337	$5,484	$5,684	$5,870	$5,819	$6,144	$10,821	$11,963
Total revenues (in millions)	$6,875	$7,185	$7,350	$8,154	$7,778	$8,179	$14,060	$15,957
Adjusted EBITDA (in millions)	$1,088	$1,451	$1,346	$1,751	$1,388	$1,817	$2,539	$3,205
Adjusted EBITDA margin	20%	26%	24%	30%	24%	30%	23%	27%
Net income (loss) (in millions)	$(151)	$391	$(94)	$101	$(63)	$361	$240	$298
Cash capex - Property & Equipment (in millions)	$947	$940	$1,131	$1,299	$982	$1,191	$1,887	$2,173
Revenue Metrics
Branded postpaid ARPA	$108.97	$107.11	$109.80	$109.87	$108.04	$113.50	$108.02	$110.81
Branded postpaid ABPA	$129.74	$131.81	$138.73	$143.79	$145.03	$152.31	$130.79	$148.72
Branded postpaid accounts, end of period	10,812	11,017	11,297	11,506	11,831	12,061	11,017	12,061
Branded postpaid customers per account	2.18	2.23	2.29	2.36	2.39	2.43	2.23	2.43
Branded postpaid phone ARPU	$50.48	$49.32	$49.84	$48.26	$46.43	$48.19	$49.89	$47.33
Branded postpaid ABPU	$59.54	$59.79	$61.59	$61.80	$60.94	$63.29	$59.67	$62.14
Branded prepaid ARPU	$36.09	$37.16	$37.59	$37.51	$37.81	$37.83	$36.63	$37.82
Devices
Smartphone sales units (in millions)	6.9	6.2	6.9	8.0	8.0	7.4	13.1	15.4
Branded postpaid handset upgrade rate	7%	8%	9%	11%	8%	9%	15%	17%
Equipment Installment Plans
EIP financed (in millions)	$1,249	$1,342	$1,317	$1,902	$1,483	$1,697	$2,591	$3,180
EIP billings (in millions)	$657	$810	$967	$1,162	$1,292	$1,393	$1,467	$2,685
EIP receivables, net (in millions)	$3,086	$3,583	$3,963	$4,690	$4,842	$5,114	$3,583	$5,114
Customer Quality
EIP receivables classified as prime	53%	53%	53%	54%	52%	52%	53%	52%
Total bad debt expense and losses from factoring arrangement (in millions)	$157	$164	$152	$150	$169	$156	$321	$325

31

T-Mobile US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures

(Unaudited)

This Investor Factbook includes non-GAAP financial measures. The non-GAAP financial measures should be considered in addition to, but not as a substitute for, the information provided in accordance with GAAP. Reconciliations for the non-GAAP financial measures to the most directly comparable GAAP financial measures are provided below.

Adjusted EBITDA is reconciled to net income (loss) as follows:

	Quarter																		Six Months Ended June 30,
(in millions)	Q1 2014			Q2 2014			Q3 2014			Q4 2014			Q1 2015			Q2 2015			2014			2015
Net income (loss)	$	(151	)	$	391		$	(94	)	$	101		$	(63	)	$	361		$	240		$	298
Adjustments:
Interest expense to affiliates	18			85			83			92			64			92			103			156
Interest expense	276			271			260			266			261			257			547			518
Interest income	(75		)	(83		)	(97		)	(104		)	(112		)	(114		)	(158		)	(226		)
Other expense (income), net	6			12			14			(21		)	8			(1		)	18			7
Income tax expense (benefit)	(102		)	286			(117		)	99			(41		)	2			184			(39		)
Operating income (loss)	(28		)	962			49			433			117			597			934			714
Depreciation and amortization	1,055			1,129			1,138			1,090			1,087			1,075			2,184			2,162
Cost of MetroPCS business combination	12			22			97			168			128			34			34			162
Stock based compensation	49			63			45			54			56			71			112			127
Gains on disposal of spectrum licenses (1)	—			(731		)	11			—			—			—			(731		)	—
Other, net	—			6			6			6			—			40			6			40
Adjusted EBITDA	$	1,088		$	1,451		$	1,346		$	1,751		$	1,388		$	1,817		$	2,539		$	3,205

(1) Gains on disposal of spectrum licenses may not agree to the Condensed Consolidated Statements of Comprehensive Income (Loss) primarily due to certain routine operating activities, such as insignificant or routine spectrum license exchanges that would be expected to reoccur, and are therefore included in Adjusted EBITDA.

32

T-Mobile US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures (continued)

(Unaudited)

The following tables illustrate the calculation of ARPA and ABPA and reconcile these measures to the related service revenues, which we consider to be the most directly comparable GAAP financial measure to ARPA and ABPA:

	Quarter												Six Months Ended June 30,
(in millions, except average number of accounts, ARPA and ABPA)	Q1 2014		Q2 2014		Q3 2014		Q4 2014		Q1 2015		Q2 2015		2014		2015
Calculation of Branded Postpaid ARPA
Branded postpaid service revenues	$	3,447	$	3,511	$	3,670	$	3,764	$	3,774	$	4,075	$	6,958	$	7,849
Divided by: Average number of branded postpaid accounts (in thousands) and number of months in period	10,543		10,928		11,141		11,421		11,645		11,966		10,736		11,806
Branded postpaid ARPA	$	108.97	$	107.11	$	109.80	$	109.87	$	108.04	$	113.50	$	108.02	$	110.81
Calculation of Branded Postpaid ABPA
Branded postpaid service revenues	$	3,447	$	3,511	$	3,670	$	3,764	$	3,774	$	4,075	$	6,958	$	7,849
Add: EIP billings	657		810		967		1,162		1,292		1,393		1,467		2,685
Total billings for branded postpaid customers	$	4,104	$	4,321	$	4,637	$	4,926	$	5,066	$	5,468	$	8,425	$	10,534
Divided by: Average number of branded postpaid accounts (in thousands) and number of months in period	10,543		10,928		11,141		11,421		11,645		11,966		10,736		11,806
Branded postpaid ABPA	$	129.74	$	131.81	$	138.73	$	143.79	$	145.03	$	152.31	$	130.79	$	148.72

33

T-Mobile US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures (continued)

(Unaudited)

The following tables illustrate the calculation of ARPU and ABPU and reconcile these measures to the related service revenues, which we consider to be the most directly comparable GAAP financial measure to ARPU and ABPU:

	Quarter																		Six Months Ended June 30,
(in millions, except average number of customers, ARPU and ABPU)	Q1 2014			Q2 2014			Q3 2014			Q4 2014			Q1 2015			Q2 2015			2014			2015
Calculation of Branded Postpaid Phone ARPU
Branded postpaid service revenues	$	3,447		$	3,511		$	3,670		$	3,764		$	3,774		$	4,075		$	6,958		$	7,849
Less: Branded postpaid mobile broadband revenues	(47		)	(54		)	(68		)	(92		)	(109		)	(135		)	(101		)	(244		)
Branded postpaid phone service revenues	$	3,400		$	3,457		$	3,602		$	3,672		$	3,665		$	3,940		$	6,857		$	7,605
Divided by: Average number of branded postpaid phone customers (in thousands) and number of months in period	22,447			23,368			24,091			25,359			26,313			27,250			22,908			26,781
Branded postpaid phone ARPU	$	50.48		$	49.32		$	49.84		$	48.26		$	46.43		$	48.19		$	49.89		$	47.33
Calculation of Branded Postpaid ABPU
Branded postpaid service revenues	$	3,447		$	3,511		$	3,670		$	3,764		$	3,774		$	4,075		$	6,958		$	7,849
Add: EIP billings	657			810			967			1,162			1,292			1,393			1,467			2,685
Total billings for branded postpaid customers	$	4,104		$	4,321		$	4,637		$	4,926		$	5,066		$	5,468		$	8,425		$	10,534
Divided by: Average number of branded postpaid customers (in thousands) and number of months in period	22,975			24,092			25,095			26,572			27,717			28,797			23,533			28,257
Branded postpaid ABPU	$	59.54		$	59.79		$	61.59		$	61.80		$	60.94		$	63.29		$	59.67		$	62.14
Calculation of Branded Prepaid ARPU
Branded Prepaid Service Revenues	$	1,648		$	1,736		$	1,790		$	1,812		$	1,842		$	1,861		$	3,384		$	3,703
Divided by: Average number of branded prepaid customers (in thousands) and number of months in period	15,221			15,569			15,875			16,097			16,238			16,396			15,395			16,317
Branded prepaid ARPU	$	36.09		$	37.16		$	37.59		$	37.51		$	37.81		$	37.83		$	36.63		$	37.82

34

T-Mobile US, Inc.

Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures (continued)

(Unaudited)

Net debt (excluding Tower Obligations) to last twelve months adjusted EBITDA ratio is calculated as follows:

	Three Months Ended
(in millions, except net debt ratio)	Mar 31, 2014			Jun 30, 2014			Sep 30, 2014			Dec 31, 2014			Mar 31, 2015			Jun 30, 2015
Short-term debt	$	151		$	272		$	1,168		$	87		$	467		$	386
Long-term debt to affiliates	5,600			5,600			5,600			5,600			5,600			5,600
Long-term debt	14,331			14,369			16,284			16,273			16,261			16,386
Less: Cash and cash equivalents	(5,471		)	(3,080		)	(5,787		)	(5,315		)	(3,032		)	(2,642		)
Net Debt (excluding Tower Obligations)	$	14,611		$	17,161		$	17,265		$	16,645		$	19,296		$	19,730
Divided by: Last twelve months Adjusted EBITDA (1)	$	4,936		$	5,122		$	5,124		$	5,636		$	5,936		$	6,302
Net Debt (excluding Tower Obligations) to Last Twelve Months Adjusted EBITDA Ratio	3.0			3.4			3.4			3.0			3.3			3.1

(1) March 31, 2014 Adjusted EBITDA for the last twelve months includes Pro Forma combined results from Q2 2013 to reflect the results of MetroPCS prior to the business combination.

Free cash flow and adjusted free cash flow are calculated as follows:

	Quarter																		Six Months Ended June 30,
(in millions)	Q1 2014			Q2 2014			Q3 2014			Q4 2014			Q1 2015			Q2 2015			2014			2015
Net cash provided by operating activities	$	759		$	970		$	1,062		$	1,355		$	489		$	1,161		$	1,729		$	1,650
Cash purchases of property and equipment	(947		)	(940		)	(1,131		)	(1,299		)	(982		)	(1,191		)	(1,887		)	(2,173		)
Free Cash Flow	(188		)	30			(69		)	56			(493		)	(30		)	(158		)	(523		)
MetroPCS CDMA network decommissioning payments	9			5			15			52			71			103			14			174
Adjusted Free Cash Flow	$	(179	)	$	35		$	(54	)	$	108		$	(422	)	$	73		$	(144	)	$	(349	)

35

Definitions of Terms

Operating and financial measures are utilized by T-Mobile's management to evaluate its operating performance and, in certain cases, its ability to meet liquidity requirements. Although companies in the wireless industry may not define measures in precisely the same way, T-Mobile believes the measures facilitate key operating performance comparisons with other companies in the wireless industry to provide management, investors, and analysts with useful information to assess and evaluate past performance and assist in forecasting future performance.

1. Customer - SIM card with a unique T-Mobile mobile identity number which generates revenue. Branded customers generally include customers that are qualified either for postpaid service, where they generally pay after incurring service, or prepaid service, where they generally pay in advance. Wholesale customers include Machine-to-Machine (M2M) and Mobile Virtual Network Operator (MVNO) customers that operate on T-Mobile's network, but are managed by wholesale partners.

2. Churn - Number of customers whose service was discontinued as a percentage of the average number of customers during the specified period.

3. Customers per account - The number of branded postpaid customers as of the end of the period divided by the number of branded postpaid accounts as of the end of the period. An account may include branded postpaid phone and mobile broadband customers.

4. Average Revenue Per Account (ARPA) - Average monthly branded postpaid service revenue earned per account. Branded postpaid service revenues for the specified period divided by the average number of branded postpaid accounts during the period, further divided by the number of months in the period. T-Mobile considers branded postpaid ARPA to be indicative of its revenue growth potential given the increase in the average number of branded postpaid phone customers per account and increased penetration of mobile broadband devices.

Average Billings Per Account (ABPA) - Average monthly branded postpaid service revenue earned from customers plus equipment installment plan (EIP) billings divided by the average number of branded postpaid accounts during the period, further divided by the number of months in the period. T-Mobile believes average branded postpaid customer billings per account is indicative of estimated cash collections, including equipment installments, from T-Mobile's customers each month on a per account basis.

Average Revenue Per User (ARPU) - Average monthly service revenue earned from customers. Service revenues for the specified period divided by the average customers during the period, further divided by the number of months in the period.

Branded postpaid phone ARPU excludes mobile broadband customers and related revenues.

Average Billings per User (ABPU) - Average monthly branded postpaid service revenue earned from customers plus EIP billings divided by the average branded postpaid customers during the period, further divided by the number of months in the period. T-Mobile believes branded postpaid ABPU is indicative of estimated cash collections, including equipment installments, from T-Mobile's customers each month.

Service revenues - Branded postpaid, including handset insurance, branded prepaid, wholesale, and roaming and other service revenues.

5. Cost of services - Costs directly attributable to providing wireless service through the operation of T-Mobile's network, including direct switch and cell site costs, such as rent, network access and transport costs, utilities, maintenance, associated labor costs, long distance costs, regulatory program costs, roaming fees paid to other carriers and data content costs.

Cost of equipment sales - Costs of devices and accessories sold to customers and dealers, device costs to fulfill insurance and warranty claims, write-downs of inventory related to shrinkage and obsolescence, and shipping and handling costs.

Selling, general and administrative expenses - Costs not directly attributable to providing wireless service for the operation of sales, customer care and corporate activities. These include commissions paid to dealers and retail employees for activations and upgrades, labor and facilities costs associated with retail sales force and administrative space, marketing and promotional costs, customer support and billing, bad debt expense and administrative support activities.

6. Adjusted EBITDA - Earnings before interest expense (net of interest income), tax, depreciation, amortization, stock-based compensation and expenses not reflective of T-Mobile's ongoing operating performance. Adjusted EBITDA margin is Adjusted EBITDA divided by service revenues. Adjusted EBITDA is a non-GAAP financial measure utilized by T-Mobile's management to monitor the financial performance of its operations. T-Mobile uses Adjusted EBITDA internally as a metric to evaluate and compensate its personnel and management for their performance, and as a benchmark to evaluate T-Mobile's operating performance in comparison to its competitors. Management also uses Adjusted EBITDA to measure its ability to provide cash flows to meet future debt service, capital expenditures and working capital requirements, and to fund future growth. T-Mobile believes analysts and investors use Adjusted EBITDA as a supplemental measure to evaluate overall operating performance and facilitate comparisons with other wireless communications companies. Adjusted EBITDA has limitations as an analytical tool and should not be considered in isolation or as a substitute for income from operations, net income, or any other measure of financial performance reported in accordance with GAAP. The reconciliation of Adjusted EBITDA to net income (loss) is detailed in the Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures schedule.

7. Cash capital expenditures - Amounts paid for construction and the purchase of property and equipment.

8. Smartphones - UMTS/HSPA/HSPA+ 21/HSPA+ 42/4G LTE enabled converged devices, which integrate voice and data services.

9. Free Cash Flow - Net cash provided by operating activities less cash capital expenditures for property and equipment. Free Cash Flow is utilized by T-Mobile's management, investors, and analysts to evaluate cash available to pay debt and provide further investment in the business. The reconciliation of Free Cash Flow to net cash provided by operating activities is detailed in the Reconciliation of Non-GAAP Financial Measures to GAAP Financial Measures schedule.

36

10. Adjusted Free Cash Flow - Free Cash Flow excluding decommissioning payments related to the shutdown of the CDMA portion of the MetroPCS network.

11. Net debt - Short-term debt, long-term debt to affiliates, and long-term debt (excluding tower obligations), less cash and cash equivalents.

37

Forward-Looking Statements

This Investor Factbook includes "forward-looking statements" within the meaning of the U.S. federal securities laws. Any statements made herein that are not statements of historical fact, including statements about T-Mobile US, Inc.'s plans, outlook, beliefs, opinion, projections, guidance, strategy, integration of MetroPCS, expected network modernization and other advancements, are forward-looking statements. Generally, forward-looking statements may be identified by words such as "anticipate," "expect," "suggests," "plan," “project,” "believe," "intend," "estimates," "targets," "views," "may," "will," "forecast," and other similar expressions. The forward-looking statements speak only as of the date made, are based on current assumptions and expectations, and involve a number of risks and uncertainties. Important factors that could affect future results and cause those results to differ materially from those expressed in the forward-looking statements include, among others, the following: our ability to compete in the highly competitive U.S. wireless telecommunications industry; adverse conditions in the U.S. and international economies and markets; significant capital commitments and the capital expenditures required to effect our business plan; our ability to adapt to future changes in technology, enhance existing offerings, and introduce new offerings to address customers' changing demands; changes in legal and regulatory requirements, including any change or increase in restrictions on our ability to operate our network; our ability to successfully maintain and improve our network, and the possibility of incurring additional costs in doing so; major equipment failures; severe weather conditions or other force majeure events; and other risks described in our filings with the Securities and Exchange Commission, including those described in our Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 19, 2015. You should not place undue reliance on these forward-looking statements. We do not undertake to update forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

About T-Mobile US, Inc.

As America's Un-carrier, T-Mobile US, Inc. (NYSE: TMUS) is redefining the way consumers and businesses buy wireless services through leading product and service innovation. The Company's advanced nationwide 4G LTE network delivers outstanding wireless experiences to approximately 59 million customers who are unwilling to compromise on quality and value. Based in Bellevue, Washington, T-Mobile US provides services through its subsidiaries and operates its flagship brands, T-Mobile and MetroPCS. For more information, please visit http://www.T-Mobile.com.

38