MEDIA ALERT: T-Mobile to Hold Conference Call

T-Mobile US, Inc. (NASDAQ: TMUS):

WHAT:T-Mobile’s (NASDAQ: TMUS) President and CEO, John Legere and other senior executives will hold a conference call to discuss the morning’s latest news from the Un-carrier.

WHEN:Wednesday, December 13, 2017 at 8am PT / 11am ET

WHERE:Access via Phone (audio only):Call-in Numbers: US/Canada toll free: 800-432-9830 OR International toll: 719-234-7318Participant Passcode: 5735302 (replay passcode: 5735302)

Stream live and on demand at http://newsroom.t-mobile.com.

Please plan on accessing the conference call ten minutes prior to the scheduled start time. The call will be approximately 30 minutes including a business update and Q&A. Participants will have multiple ways to submit questions including via phone and Twitter. To ask a question on the call, press *1 on your phone to enter the queue.

About T-Mobile US, Inc.

As America's Un-carrier, T-Mobile US, Inc. (NASDAQ: TMUS) is redefining the way consumers and businesses buy wireless services through leading product and service innovation. Our advanced nationwide 4G LTE network delivers outstanding wireless experiences to 70.7 million customers who are unwilling to compromise on quality and value. Based in Bellevue, Washington, T-Mobile US provides services through its subsidiaries and operates its flagship brands, T-Mobile and MetroPCS. For more information, please visit http://www.t-mobile.com.

View source version on businesswire.com: http://www.businesswire.com/news/home/20171212005780/en/

Media ContactsT-Mobile US Media [e-mail] Relations877-281-TMUS OR [e-mail]