Press right on the Express Key. "Keylock OFF?" should now be displayed. Press the OK key (ENTER key if you are using a G75).

Because you want to change the wireless company you get service from in the US, and want to keep your present phone. You've changed to a different service provider and got a new phone, but you want to unlock your old phone so you can use it in an emergency just by swapping the SIM over if your main phone gives problems.

Press the Menu/OK button, and then scroll and select the Lock icon to lock/unlock the keypad. If your keypad is already locked, and you want to unlock it temporarily to make a call, hold down the Menu/OK button for three seconds. The keypad will automatically relock one minute after you have completed your call or locate.

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Press Right on the Express key. Scroll down to "Keylock ON?" and press the OK key (ENTER key if you are using a G75).