procedure:
Thumbs up GTX75 UTStarcom Quickfire AT&T lock!
To unlock AT&T Quickfire phone:
1. Power off device and remove AT&T SIM card.
2. Insert SIM Card from another wireless carrier.
3. Power on the handset.
4. With the device in Portrait mode, tap the phone icon.
5. Dial *#865625# to enter the unlock code from POS
6. Display now says "TO UNLOCK SIM ENTER UNLOCK CODE CORRECTLY. FIVE (5) TIMES WILL RESULT IN THE PERMANENT LOCK OF YOUR PHONE CONTINUE?"
