An unknown number of AT&T Mobility customers had their data shared by a third party partner of AT&T, the company reported in an official filing. The data pertained to unlocking capabilities of mobile phones in a third party phone market. The data included social security numbers and dates of birth.
AT&T says that all affected customers have been notified, but they won't say how many were affected. The law says that you must notify authorities if it's over 500.