I am from India and using Galaxy Note 2 and have updated my phone to 4.4.2 official firmware after downloading it through Sam mobile.
Post updation, i am not able to make or receive calls or send messages as i am getting information as "not registered in network"
I have done everything possible after going through internet, trying the flying mode option, removing the SIM and then reinserting it, trying to select the network manually and automatically
Even i tried updating the new official firmware again, but with no success
Kindly advice on how to proceed further