. Call your AT&T carrier and request for an unlocked code for your Sharp FX. If the person answers you call refuses to give you one, try to call again later and talk to different person. Or, you may request to talk to the manager.
· Get the IMEI number (might be requested by your carrier when you call them). To get IMEI Number, punch *#06# on your phone and hitting the send key.
· Turn on your GSM mobile phone with an unaccepted SIM card.
· Now enter your unlock code when prompted.
· Reboot your moible phone and it should be unlocked.