-

Leading Consumer Rights Law Firm Hagens Berman Launches Investigation into T-Mobile Data Breach Affecting at Least 37 Million Users Nationwide

Attorneys urge consumers to contact the firm, join fight against telecom titan for failure to protect sensitive information in cybersecurity breach

BELLEVUE, Wash.--(BUSINESS WIRE)--Attorneys at Seattle-based plaintiffs law firm Hagens Berman are investigating T-Mobile, following reports of a massive data breach in November 2022. If you believe you are among the 37 million people whose sensitive personal information was compromised in this incident, you can join the investigation and help hold T-Mobile accountable.

If you are a current, former or prospective T-Mobile customer, you may be affected. Fill out the form to find out your rights.

Compromised data may include billing addresses, phone numbers, email addresses, dates of birth, T-Mobile account numbers and other account information such as the number of lines on the account and plan features.

This is not the first time T-Mobile customers have had their personal information exposed to identity thieves and dark web actors. The company has disclosed eight data breaches since 2018.

The Looming Threat of Identity Theft

“T-Mobile just seems unwilling to adequately protect its customers’ data,” said Thomas E. Loeser, the Hagens Berman attorney leading the investigation. “Our research may reveal that additional sensitive information has been compromised, and the company has yet to individually notify affected customers of the data breach, as it is required to under many state laws. Identity theft can turn your life upside down, and consumers deserve the information they need to protect themselves.” Loeser is a former federal cyber-prosecutor and was a member of the Cyber and Intellectual Property Crimes Section at the U.S. Attorney’s Office in Los Angeles.

Identity theft is a very real threat T-Mobile customers are now facing, with reports indicating that up to 65% of people involved in a data breach will experience it. Victims of the November 2022 data breach will be forced to undertake the arduous process of freezing their credit with all three credit reporting agencies and pay for credit reports, credit monitoring and other preventative measures if they’re to have any hope of protecting themselves from bad actors.

What Should T-Mobile Customers Do About Their Hacked Data?

Hagens Berman’s attorneys suggest that anyone who believes they may have been affected monitor their financial accounts for any suspicious activity. T-Mobile has stated that it will be offering two years of free identity protection services, which may provide limited protection and notification of identity theft, according to the firm’s attorneys.

Experts are recommending that consumers change their T-Mobile account password and PIN and freeze their credit with all three credit reporting agencies. If you elect to use any pay service to protect yourself from identity theft because of the T-Mobile data breach, be sure to save receipts showing your payments. You may be eligible for reimbursement through future legal actions.

“Big corporations need to be held accountable for failing to protect the privacy and livelihoods of their customers,” said Loeser. “It’s unacceptable that T-Mobile put its customers in this position, and it must substantially up its security while providing genuine compensation to the consumers its negligence has already harmed.”

Hagens Berman has extensive experience litigating cases of this nature. The firm was one of only a select few chosen to help lead the case against T-Mobile for its 2021 breach, which resulted in a proposed $350 million settlement.

Find out more about the firm’s investigation on behalf of consumers into T-Mobile’s 2022 data breach.

About Hagens Berman

Hagens Berman is a global plaintiffs’ rights complex litigation law firm with a tenacious drive for achieving real results for those harmed by corporate negligence and fraud. Since its founding in 1993, the firm’s determination has earned it numerous national accolades, awards and titles of “Most Feared Plaintiff’s Firm,” MVPs and Trailblazers of class-action law. More about the law firm and its successes can be found at www.hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.

Contacts

Ashley Klann
pr@hbsslaw.com
206-268-9363

Hagens Berman


Release Summary
Attorneys at Seattle-based plaintiffs law firm Hagens Berman are investigating T-Mobile following reports of a massive data breach in November 2022.
Release Versions
$Cashtags

Contacts

Ashley Klann
pr@hbsslaw.com
206-268-9363

Social Media Profiles
More News From Hagens Berman

Hagens Berman Investigating Fermi Inc. (FRMI) as Shares Tank 33% Amid First Tenant Contract Termination

SAN FRANCISCO--(BUSINESS WIRE)--On December 12, 2025, investors in Fermi Inc. (NASDAQ: FRMI) saw the price of their shares crater about 33% after the company revealed that a prospective anchor tenant (“First Tenant”) for Fermi’s Project Matador (the company’s Advanced Energy and Intelligence Campus at Texas Tech University) terminated an agreement that would have advanced $150 million to help fund construction. The company has billed Matador as a multi-gigawatt energy and data center developmen...

Hagens Berman Announces Investigation into F5, Inc. (FFIV), Which Faces Securities Class Action Amid Cybersecurity Incident, Questions About Disclosure Timing and Impact on Company’s Business

SAN FRANCISCO--(BUSINESS WIRE)--A securities class action lawsuit styled Smith v. F5, Inc., et al., No. 2:25-cv-02619 (W.D. Wash.) has been filed, seeking to represent investors in F5 (NASDAQ: FFIV) who purchased or otherwise acquired F5 securities between October 28, 2024 and October 27, 2025. The lawsuit comes in the wake of F5’s October 15, 2025 report that, on August 9, 2025, it learned of a major cybersecurity incident involving a nation-state actor that gained unauthorized access to certa...

Hagens Berman: Ford Dealers File Class Action Alleging Major Warranty Reimbursement Shortfalls

DETROIT--(BUSINESS WIRE)--Ford dealers filed a class-action lawsuit against the automaker alleging underpaid warranty reimbursements, according to Hagens Berman....
Back to Newsroom