The violation went to an unit of the credit rating company Experian, which T-Mobile utilizes to process info on customers.
Names, birth days and social security numbers are among data taken, yet not financial information, the companies stated.
Chief executive John Legere stated his company would certainly examine its link with Experian. “Certainly I am incredibly furious regarding this information breach,” he said.
Clients who were credit-checked in between 1 September 2013 and 16 September 2015 are most in danger.