How to activate carrier locked phone.

This would only activate the phone for normal use but won't work with other carriers ( if the carrier with which your phone is locked has no service in your region , you could use your phone as a iPod )

This problem mostly occur when you update your phone via computer and the phone gets locked , iPhone turns into iBrick and the only way I know to get rid of this problem is to insert a sim card of that carrier by which your phone is locked .

What if that carrier has no service in your area ! Then just simply connect to a wifi hot spot and you are done !!! 

Now you can pull out the sim card if you want .

;)