The Unlocking Instructions For Blackberry 8700 family Mobile Phones1 - Go to the Menu -> Options -> Advanced Options -> Sim card and press select,
2 - While holding the Shift key (bottom right corner CAPS), type mepd.
3 - You should now see the five locking categories listed, while holding the alt key, type mep2.
4 - Release the alt key.
5 - You will now prompted to enter the Network MEP code.
6 - Enter the Unlock Code, and press enter(Return/Enter), the device should then be unlocked.