In a regulatory filing Thursday, the company said the hacker stole customer data that included names, billing addresses, emails, phone numbers, dates of birth, T-Mobile account numbers and information describing the kind of service they have with the wireless carrier.T-Mobile said no social security numbers, credit card information, government ID numbers, passwords, PINs or financial information were exposed in the hack.It noted that it could be on the hook for “significant expenses” because of the hack, although the company said it doesn’t expect the charges will have a material effect on T-Mobile’s bottom line.T-Mobile (TMUS) was able to discover the source of the breach and stop it a day after the hack was discovered.The company says it continues to investigate the breach but believes it is “fully contained.” It also noted T-Mobile (TMUS)’s systems and network do not appear to have been hacked."