*sigh*
http://www.engadget.com/2015/10/01/tmobile-experian-hack/"T-Mobile has just revealed that it has been the victim of a major hack that has exposed the personal details, including social security numbers, for approximately 15 million of its customers. CEO John Legere has just posted a letter regarding the hack in which he says that a data breach of credit vendor Experian has revealed the info; T-Mobile uses Experian to process its credit applications. Names, addresses and birth dates for those 15 million customers were revealed to the hackers as well as encrypted data that contained details like social security numbers and drivers license numbers. Unfortunately, Experian believes that the encryption protecting those bits of data was compromised, as well."
If you have T-Mobile, I suggest you make sure there's no suspicious activity on your credit card or anything else.
EDIT: Made a small mistake, no credit card numbers were revealed, but SSNs still were and that's really bad.
EDIT2: If you know someone else who has t-mobile, like a parent or a friend or whatever you should probably let them know too.