05-13-2013 02:41 PM
Welcome to Support Forums
Are you able to use other BlackBerry services like emails ?
Try those steps in the same sequence :
1- Register your Handheld .
2- Resend your Service Book
3- Then perform a battery pull restart like this while the device is powered On remove your battery wait for a min. then reinsert it back
Please note you must recieve those registration messages or else you have to contact your carrier is having any problem with there network or your account is properly configured with BIS .