X0306 4 2017-01-25 0 0001283699 T-Mobile US, Inc. TMUS 0001392403 Keys Thomas Christopher C/O T-MOBILE US, INC. 12920 SE 38TH STREET BELLEVUE WA 98006 0 1 0 0 Pres., T-Mobile Ind. Channels Common Stock 2017-01-25 4 M 0 100000 55.43 A 455876 D Common Stock 2017-01-25 4 S 0 100000 60.3092 D 355876 D Stock Option (Right to Buy) 55.43 2017-01-25 4 M 0 100000 0.00 D 2017-08-08 Common Stock 100000 100000 D The transactions reported here were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 13, 2015. The price shown is a weighted average sales price. The shares were sold at prices ranging from $60.25 to $60.455 per share. The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. The option was granted on August 8, 2007. To the extent not already vested as of April 30, 2013, the vesting of this option was accelerated in connection with the closing of the transactions contemplated by the Business Combination Agreement, dated as of October 3, 2012 and amended as of April 14, 2013, among Deutsche Telekom AG, T-Mobile Global Zwischenholding GmbH, T-Mobile Global Holding GmbH, T-Mobile USA Inc. and MetroPCS Communications, Inc. pursuant to the terms of an equity plan of MetroPCS Communications, Inc. /s/ Sarah E. Mock, Attorney-in-Fact 2017-01-27