(Reuters) – U.S. wireless carrier T-Mobile said on Thursday it was investigating a data breach involving million postpaid and prepaid accounts Events are expected to incur significant costs associated with the event.
The company said it detected the malicious activity on Jan. 5 and contained it within a day, adding that no sensitive data such as financial information was leaked.
However, T-Mobile said some basic customer information was obtained, such as name, billing address, email and phone number.
“Our investigation is still ongoing, but at this time the malicious activity appears to be fully contained and there is currently no evidence that bad actors were able to compromise or compromise our systems or networks,” the company said, adding It added that it had started notifying affected customers.
Shares of the company fell 2% in after-hours trading.
Last year, Bellevue, Washington-based T-Mobile agreed to pay $150 million and spend an additional $37 million USD to upgrade data security to settle lawsuit against 2021 cyber attack that damaged estimated property belonging to . Information on 6 million people.
T-Mobile has over 76 million subscribers, making it the third largest wireless carrier in the United States.