T-Mobile Data Breach to Be Investigated by Massachusetts Attorney General

Massachusetts’ attorney general said on Tuesday she will investigate the cyberattack against T-Mobile that exposed personal information of more than 53 million people.

Maura Healey, the attorney general, announced the probe after the third-largest US wireless carrier disclosed the breach on August 16.

The breach exposed names, birthdays, social security numbers, driver’s license information, PIN numbers, and other data belonging to an estimated 13.1 million current and 40 million former and prospective T-Mobile customers.