X0306 4 2016-12-30 0 0001283699 T-Mobile US, Inc. TMUS 0001268069 BARNES W MICHAEL C/O T-MOBILE US, INC. 12920 SE 38TH STREET BELLEVUE WA 98006 1 0 0 0 Common Stock 2016-12-30 4 M 0 22500 14.57 A 113267 D Common Stock 2016-12-30 4 S 0 22500 57.86 D 90767 D Stock Option (Right to Buy) 14.57 2016-12-30 4 M 0 22500 0.00 D 2017-01-26 Common Stock 22500 0 D The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 5, 2016. The option was granted on January 26, 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. The option was fully vested and would have expired on January 26, 2017. /s/ Sarah E. Mock, Attorney-in-Fact 2017-01-03