T-Mobile says investigating data breach involving 37 million accounts

Jan 19 (Reuters) – U.S. mobile operator T-Mobile said on Thursday it was investigating a data breach involving 37 million postpaid and prepaid accounts and planned to take legal action. significant costs related to the incident.

The company said it identified malicious activity on January 1. 5 and contained it within a day, adding that no sensitive data such as financial information was compromised.

However, some basic customer information was obtained, such as name, billing address, email and phone number, T-Mobile said.

“Our investigation is still ongoing, but the malicious activity appears to be fully contained at this time, and there is currently no evidence that the bad actor may have breached or compromised our systems or network,” the company said. , adding that it had begun notifying affected customers.

The US Federal Communications Commission (FCC) has also opened an investigation into the company’s data breach incident, The Wall Street Journal reported Thursday, citing an FCC spokesperson.

FCC and T-Mobile did not immediately respond to Reuters requests for comment on the reported investigation.

Shares of the company fell 2% in after-hours trading.

Last year, Bellevue, Wash.-based T-Mobile agreed to pay $350 million and spend another $150 million to improve data security to settle a lawsuit over a cyberattack. in 2021 that compromised information belonging to approximately 76.6 million people.

T-Mobile has over 110 million subscribers, making it the third largest wireless carrier in the United States.

Reporting by Eva Mathews and Lavanya Ahire in Bengaluru; Editing by Sriraj Kalluvila, Maju Samuel and Rashmi Aich

Our standards: The Thomson Reuters Trust Principles.


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