X0306 4 2017-04-17 0 0001283699 T-Mobile US, Inc. TMUS 0001297461 Carter J Braxton II C/O T-MOBILE US, INC. 12920 SE 38TH STREET BELLEVUE WA 98006 0 1 0 0 EVP & CFO Common Stock 2017-04-17 4 M 0 500 37.91 A 179068 D Common Stock 2017-04-17 4 F 0 380 64.94 D 178688 D Stock Option (Right to Buy) 37.91 2017-04-17 4 M 0 500 0.00 D 2013-04-30 2017-04-18 Common Stock 500 0 D Since the date of the reporting person's last ownership report, he transferred 18,315 shares to his former spouse pursuant to a domestic relations order. Mr. Carter tendered by attestation 380 shares of common stock already owned by him in order to exercise his stock options for 500 shares, thus increasing his ownership by a net of 120 shares. The option was granted on April 18, 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 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 April 18, 2017. /s/ Sarah E. Mock, Attorney-in-Fact 2017-04-19