How to Enter Unlock Codes on BlackBerry Curve 8800 8820 8300 8310 8320 8900 8520
Note: NO SIM is needed to unlock the phone. 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 Settings
3) Go to Options
4) Go to Advanced Options
5) Go to Sim Card
6) HOLD ALT and press: MEP2, if nothing comes up then try typing MEP4 (Please note that you will NOT see what you type on the screen)
7) It will ask you for the unlock code. Enter it and then press trackball to confirm and your phone is unlocked!