T-Mobile US, Inc. (NASDAQ: TMUS) looks forward to discussing its fourth quarter and full-year 2019 financial and operational results on Thursday, February 6, 2020 at 4:30 p.m. Eastern Time (ET). The event will be live-streamed via the Company’s Investor Relations website at http://investor.t-mobile.com. T-Mobile US, Inc. will issue a press release and Investor Factbook reporting its results at approximately 4:05 p.m. ET on Thursday, February 6, 2020. The press release and Investor Factbook will be posted at the same time on the Company’s Investor Relations website at http://investor.t-mobile.com.

Access via Phone (audio only)

Date: Thursday, February 6, 2020

Time: 4:30 p.m. (ET)

US/Canada: 866-575-6534

International: +1 323-794-2094

Participant Passcode: 5259088

A replay of the earnings call will be available for two weeks starting shortly after the call concludes and can be accessed by dialing 888-203-1112 (toll free) or +1-719-457-0820 (international). The passcode required to listen to the replay is 5259088. To automatically receive T-Mobile financial news by e-mail, please visit the T-Mobile Investor Relations website, http://investor.t-mobile.com, and subscribe to E-mail Alerts.

Submitting Questions

Those interested in submitting questions during the earnings call can do so also by sending a tweet to @TMobileIR or @JohnLegere using $TMUS.

T-Mobile Social Media

Investors and others should note that we announce material financial and operational information to our investors using our investor relations website, press releases, SEC filings and public conference calls and webcasts. We also intend to use certain social media accounts as means of disclosing information about us and our services and for complying with our disclosure obligations under Regulation FD (the @TMobileIR Twitter account (https://twitter.com/TMobileIR) and through April 30, 2020, the @JohnLegere Twitter (https://twitter.com/JohnLegere), Facebook and Periscope accounts, which Mr. Legere also uses as means for personal communications and observations, and on and after May 1, 2020 the @SievertMike Twitter (https://twitter.com/SievertMike) account, which Mr. Sievert also uses as a means for personal communications and observations). The information we post through these social media channels may be deemed material. Accordingly, investors should monitor these social media channels in addition to following our press releases, SEC filings and public conference calls and webcasts. The social media channels that we intend to use as a means of disclosing the information described above may be updated from time to time as listed on our investor relations website.

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 nationwide 5G and advanced 4G LTE network delivers outstanding wireless experiences to 86.0 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 Metro by T-Mobile. For more information, please visit http://www.t-mobile.com.