X0306 4 2022-01-28 1 0001283699 T-Mobile US, Inc. TMUS 0001065521 SOFTBANK GROUP CORP TOKYO PORTCITY TAKESHIBA 1-7-1 KAIGAN MINATO-KU TOKYO M0 105-7537 JAPAN 1 0 0 0 0001815949 Delaware Project 6 L.L.C. 1 CIRCLE STAR WAY 4F SAN CARLOS CA 94070 1 0 0 0 On January 28, 2022, Mr. Raul Marcelo Claure, a member of the board of directors of T-Mobile US, Inc., ceased to be an employee of SoftBank Group Corp. Aa a result, the Reporting Persons are no longer deputized directors. /s/ Natsuko Ohga Head of Corporate Legal Department of SOFTBANK GROUP CORP. 2022-02-04 /s/ Stephen Lam, Manager of DELAWARE PROJECT 6 L.L.C 2022-02-04