Exhibit 12.1

Calculation of Ratio of Earnings to Fixed Charges

	Year Ended December 31,															Three Months Ended
(dollars in millions)	2008			2009			2010			2011			2012			March 31, 2013
Earnings available for fixed charges:
Income (loss) before income taxes and earnings from unconsolidated affiliates	$	2,982		$	2,328		$	2,180		$	(4,919	)	$	(6,991	)	$	189
Adjustments:
Fixed charges		1,172			1,562			1,395			1,487			1,474			428
Amortization of capitalized interest		14			24			27			31			34			8
Capitalized interest		(86	)		(56	)		(35	)		(24	)		(9	)		(1	)
Earnings from Non-Controlling Interests		(6	)		(6	)		(3	)		—			—			—
Earnings available for fixed charges	$	4,076		$	3,852		$	3,564		$	(3,425	)	$	(5,492	)	$	624
Fixed charges:
Interest expense including capitalized interest	$	489		$	796		$	591		$	694		$	686		$	230
Portion of rent expense representative of interest (1)		683			766			804			793			788			198
Fixed charges	$	1,172		$	1,562		$	1,395		$	1,487		$	1,474		$	428
Ratio of earnings to fixed charges (2)		3.48			2.47			2.55			—			—			1.46

(1) The portion of operating rental expense that management believes is representative of interest is estimated to be 33%.

(2) Due primarily to T-Mobile’s non-cash impairment charges in the years ended December 31, 2012 and 2011, the ratio coverage was less than 1:1 in each of these periods. The Company would have needed to generate additional earnings of $7.0 billion and $4.9 billion in the year ended December 31, 2012 and 2011, respectively, to achieve a coverage of 1:1 in each of these periods.