How to Enter Unlock Codes on Blackberry 5xxx, 6xxx, 7xxx (Except for 7100)
Note: After phone is unlocked, remove the battery, insert SIM as desired and re-insert the battery. Phone MUST be restarted to use the new SIM card.
1) Power on
2) Go to Options.
3) Scroll to SIM CARD then press jog dial in once to select it
4) HOLD ALT (Half-moon key on the lower left side) and press: mepe ( Please note that you will NOT see what you type on the screen )
5) It will ask you for the unlock code. Enter it and then press jog dial once to confirm and your phone is unlocked!