1. Insert SIM card
2. Go to "Settings" -> "Options" (or Go to "Options" ->" Device" for 9800, 9780 and other OS 6.0)
3. Select "Advanced options" or "Advanced system settings" -> "SIM Card"
4. Type "mepd" (or "meppd" for 8100, 8110, 8120) using your Blackberry keyboard
5. Type "mep" (or "mepd" for 8100, 8110, 8120) then [ALT BUTTON] and "2"
NOTE: You will not see any text appear on the screen while typing on step 3 and 4.
6. You should be presented with a prompt "Enter Network MEP Code"
7. Enter the Unlock Code(3928796406519391) and press in the enter/track ball/track pad to confirm
8. Device is now unlocked.
NOTE: Make sure you follow these or the instructions correctly.
If you enter the unlock code incorrectly ten times, the device will permanently lock to the carrier to which it is branded.

http://i.upanh.com/rvctxk