Transfer Agent

American Stock Transfer & Trust Company
Attn. Shareholder Services Department
6201 15th Avenue, Brooklyn NY 11219
Website: www.astfinancial.com
Email: help@astfinancial.com
Telephone: 1-800-499-8410

Investor Relations

Email: investor.relations@t-mobile.com
Fax: 212-358-3224

T-Mobile US, Inc.
Investor Relations
1 Park Avenue, 14th Floor
New York, NY 10016

Investor Relations Team

Nils Paellmann
Vice President, Investor Relations

Ben Barrett
Senior Director, Investor Relations

Chezzarae Jensvold
Senior Director, Investor Relations

Samia Bhatti
Manager, Investor Relations

Esther Tehrani
Specialist, Investor Relations