T-Mobile is investigating a data breach involving 37 million accounts

20 Jan. (Reuters) – T-Mobile (TMUS.O), the No. 3 mobile carrier in the US by subscribers, said on Thursday it was investigating a data breach involving 37 million postpaid and prepaid accounts and could incur significant costs. incurred in connection with the incident.

The company, which has more than 110 million subscribers, said it had identified malicious activity on January 5 and contained it within a day, adding that no sensitive data such as financial information had been compromised.

However, some basic customer information has been obtained, such as name, billing address, email address and phone number, and it has begun notifying affected customers, T-Mobile said.

“Our investigation is ongoing, but the malicious activity appears to be fully contained at this time and there is currently no evidence that the attacker was able to breach or compromise our systems or network,” the company said. .

The US Federal Communications Commission (FCC) has opened an investigation into the data breach, the Wall Street Journal reported Thursday based on an FCC spokesperson.

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

“While these cybersecurity breaches may not be systematic in nature, their frequency at T-Mobile is an alarming outlier compared to telecom peers,” said Neil Mack, senior analyst at Moody’s Investors Service.

“It could negatively impact customer behavior, spike customer churn and potentially attract the attention of the FCC and other regulators.”

Last year, T-Mobile agreed to pay $350 million and spend another $150 million to improve data security to settle a lawsuit over a 2021 cyber-attack that compromised information of an estimated 76.6 million people. was endangered.

Shares of the Bellevue, Washington-based company fell 2% in after-hours trading.

Reporting by Eva Mathews and Lavanya Ahire in Bengaluru; Adaptation by Sriraj Kalluvila, Maju Samuel, Rashmi Aich and Savio D’Souza

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