“AT&T is offering an apology and a free year’s worth of credit monitoring services to customers who may have been affected by a security breach. Unlike recent breaches at retailers like Target and Home Depot, AT&T’s was done by an insider who had illegally accessed personal information from subscribers, including Social Security numbers and driver’s license information. The breach affects an unspecified number of AT&T accounts and was believed to happen in August 2014.”
Source:Customer information compromised in AT&T insider breach | Android Central