To find your BlackBerry's PIN on the device
For the 7100 model, select Settings, then Options, and then select Status.
For all other models:
1.Select Options.
2.Select Status, and you will then see an 8-digit alphanumeric ID labeled "PIN:".
Or, you can also press the key combination “ALT+LSHIFT+H” or “ALT+RSHIFT+H” on any QWERTY Blackberry.