What do I do if my GoPhone SIM card gets lost or stolen?
If your AT&T Wireless SIM card is lost or stolen, contact AT&T Wireless Customer Care immediately at 1 866 293-4634. (TTY users dial 1 866 429-7889.) There is a $25 replacement fee for a lost or stolen AT&T Wireless SIM card. You are responsible for all usage made using your AT&T Wireless SIM card until you call and report it missing.