Not registered on network error on Samsung galaxy’s Android smartphone is the error which you get frequently even the network connection is ok and showing full network.

3rd Method to Fix Not registered on Network-
Dial *#06#
If you find your IMEI no. then it is OK

But if you see “IMEI Null” then you have to reconfigure the settings.

Then Follow this link to Reset it –
http://bit.ly/1KpThUA .