1 - While on the home screen, click the “blackberry key” on keyboard, then select “options”.

2 - Choose “Advanced Options”.

3 - Select “Sim Card”

4 - There is no area to type these letters, you just type them as instructed. No need to hit keys twice to get a letter either. Type m e p p d to display the first five levels of SIM locking. Most companies use network locking so the Network should display Active. All other states should display Disabled ( you will not see text appear on screen
while typing )

5 - Type m e p p 2 to display the dialog box asking for the unlock code
(Press the Alt + 2 key to get the number 2) ( you will not see text
appear on screen while typing )

6 - Input the SIM Unlock code