Jan 19 (Portal) – US wireless carrier T-Mobile (TMUS.O) said Thursday it was investigating a data breach involving 37 million postpaid and prepaid accounts and expected significant costs linked to the incident .
The company said on Jan. 5 it identified malicious activity and contained it within a day, adding that no sensitive data such as financial information was compromised.
However, some basic customer information was preserved, such as name, billing address, email and phone number, T-Mobile said.
“Our investigation is ongoing, but malicious activity appears to be fully contained at this time, and there is currently no evidence that the bad actor was able to breach or compromise our systems or network,” the company said adding that it has started notifying affected customers.
The U.S. 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 spokesman.
The FCC and T-Mobile did not immediately respond to Portal requests for comment on the reported investigation.
The company’s shares 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 and resolve a lawsuit over a 2021 cyberattack where the information of an estimated 76.6 million people was compromised.
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; Edited by Sriraj Kalluvila, Maju Samuel and Rashmi Aich
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