T-Mobile Secures First-Ever Full Investment Grade Rating

Three IG ratings lead to full IG rating that reflects confidence in the Un-carrier’s strong operational and financial performance and customer-first focus

T-Mobile US, Inc. (NASDAQ: TMUS) today announced that following an investment grade issuer rating from S&P Global Ratings (S&P) – the third it has received from credit rating agencies – the company now has its first-ever full investment grade rating. S&P has assigned the Company a BBB- with positive outlook. This follows the company securing a Baa3 rating with a stable outlook from Moody’s and a BBB- rating with a positive outlook from Fitch.

This full investment grade rating comes as a result of T-Mobile’s successful operational and financial performance, which is consistently demonstrated through strong subscriber growth and the company’s ability to translate that into increasing free cash flow.

“Achieving a full investment grade rating is an important milestone for T-Mobile that reflects the leading credit rating agencies’ positive outlook on our Un-carrier leadership strategy that is rooted in an unwavering focus on putting customers first,” said Peter Osvaldik, T-Mobile chief financial officer. “This ‘clean sweep’ in upgrades provides T-Mobile with the ability to unlock full access to the deep investment grade debt markets, which will further fuel our growth and momentum toward our mission of being the very best at connecting customers to their world.”

About T-Mobile US, Inc.

T-Mobile U.S. Inc. (NASDAQ: TMUS) is America’s supercharged Un-carrier, delivering an advanced 4G LTE and transformative nationwide 5G network that will offer reliable connectivity for all. T-Mobile’s customers benefit from its unmatched combination of value and quality, unwavering obsession with offering them the best possible service experience and undisputable drive for disruption that creates competition and innovation in wireless and beyond. Based in Bellevue, Wash., T-Mobile provides services through its subsidiaries and operates its flagship brands, T-Mobile and Metro by T-Mobile. For more information please visit: https://www.t-mobile.com.

Forward-Looking Statements

This communication includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact are forward-looking statements. These forward-looking statements are generally identified by the words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “could” or similar expressions. Forward-looking statements are based on current expectations and assumptions, which are subject to risks and uncertainties that may cause actual results to differ materially from the forward-looking statements. These risks and uncertainties include those related to the Company’s operational and financial performance and the Company’s ability to access investment grade debt markets. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements. We undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements, except as required by law.

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