T-Mobile suffered the second data breach of 2023, threat actors had access to the personal information of hundreds of customers starting in late February 2023.

The security breach impacted a limited number of customers, only 836 individuals. The carrier states that personal financial account information and call records were not affected by the security breach.

“In March 2023, the measures we have in place to alert us to unauthorized activity worked as designed and we were able to determine that a bad actor gained access to limited information from a small number of T-Mobile accounts between late February and March 2023.” reads the data breach notification letter sent to the impacted customers and shared by BleepingComputer.