Your Blackberry PIN # is a unique identification number that allows you to use data services as well as Blackberry messenger services.

For most worldwide Blackberrys as well as any Telus or Bell phones, you need the PIN # to unlock your phone.  This can be found in a couple places.

1.) On the box of your phone.  It should be written on the side with a white sticker.
Note: This can be very unreliable as many people from third party sites (ex. ebay) sell phones with non-matching IMEIs and PINs.  If you get it from your carrier, it is more reliable

2.) By going to options – status.  You will find all the necessary information for your Blackberry mobile device here.

3.) On the homepage screen of your Blackberry phone, press ALT + CTRL + H.   You will find your PIN here as well.