GlobeNewswire Inc | Aug 31, 2021 08:09PM EDT

September 01, 2021

NEW YORK, Aug. 31, 2021 (GLOBE NEWSWIRE) -- Pomerantz LLP is investigating claims on behalf of investors of T-Mobile US, Inc. (T-Mobile or the Company) (NASDAQ:TMUS). Such investors are advised to contact Robert S. Willoughby atnewaction@pomlaw.com or 888-476-6529, ext. 7980.

The investigation concerns whether T-Mobile and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.

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On August 15, 2021, Vice published an articled entitled T-Mobile Investigating Claims of Massive Customer Data Breach. The Vice article reported, in part, that T-Mobile was investigating a forum post claiming to be selling a mountain of personal data that came from T-Mobile servers and purportedly includes social security numbers, phone numbers, names, physical addresses, unique IMEI numbers, and driver licenses information[.] Then, on August 16, 2021, T-Mobile issued a press release confirming that the Company had determined that unauthorized access to some T-Mobile data occurred and was continuing our deep technical review of the situation across our systems to identify the nature of any data that was illegally accessed.

On this news, T-Mobiles stock price fell $4.21 per share, or 2.9%, to close at $140.74 per share on August 16, 2021.

Pomerantz LLP, with offices in New York, Chicago, Los Angeles, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com.

CONTACT:Robert S. WilloughbyPomerantz LLPrswilloughby@pomlaw.com888-476-6529 ext. 7980