On November 10, 2020, Srini Gopalan notified the Board of Directors of T-Mobile US, Inc. (the “Company”) of his decision to resign from the Board and the Nominating and Corporate Governance Committee (the “Committee”) of the Board, effective November 13, 2020. On November 12, 2020, pursuant to that certain Second Amended and Restated Stockholders’ Agreement (the “Stockholders’ Agreement”), dated as of June 22, 2020, by and among the Company, Deutsche Telekom AG (“DT”) and SoftBank Group Corp., the Board increased the size of the Board to 14 directors and appointed each of Dominique Leroy, Omar Tazi and Michael Wilkens (collectively, the “New Directors”) to the Board, effective November 13, 2020. Each of the New Directors was designated by DT pursuant to the Stockholders’ Agreement. The Board also appointed Ms. Leroy as a member of the Committee, effective November 13, 2020. Messrs. Tazi and Wilkens have not been appointed to serve on any Board committees at this time. Ms. Leroy currently serves as a member of the Board of Management of DT, responsible for the Board Area Europe. Mr. Tazi currently serves as Senior Vice President at DT in charge of Group Innovation, Products, Design & Customer Experience, as well as Global Partnerships and Devices. Mr. Wilkens currently serves as Senior Vice President Group Controlling (FP&A) of DT.