All models of BlackBerry
1 - Go to the menu, then Settings Menu -> Select Advanced options => and then Sim card.2 - While holding down the SHIFT key, type MEPD or (MEPPD combines for Vodafone)
3 - You should now see the five categories listed lock.
4 - While holding down the SHIFT key, type MEP2 or (MEPP2 handsets for Vodafone)
5 - Release the Shift key.
6 - You are now invited to enter the Network MEP code (it will also be the number of attempts left)