1. Check Number PIN and Imei his
It is very important and have to remember is that all Blackberry mobile phones must have a PIN number and Imei, and not perhaps not. So check by potential users is very important.
How to view Imei can be done by:
Press * # 06 # then press OK
While I view the PIN number once Imei is:
Press OPTION> STATUS and press OK
the PIN number, Imei and other information about the mobile phone will appear.
Regards Mobile Club Pakistan