I just got this text from T-Mobile.
T-Mobile has determined that unauthorized access to some of your information, or others on your account, has occurred, like name, address, phone number and DOB. Importantly, we have NO information that indicates your SSN, personal financial or payment information, credit/debit card information, account numbers, or account passwords were accessed. We take the protection of our customers seriously. Learn more about practices that keep your account secure and general recommendations for protecting yourself: t-mo.co/Protect