[Q] Galaxy Grand Duos IMEI lost
I have a Galaxy Grand Duos which now has an IMEI 000000000000 after upgrading to 4.2.2.
My question is how can I restore the IMEI ?
1- If i downgraded back to 4.1.2, does it work? If yes how is it done ?
2-If i rooted it and installed a custom ROM, does it work?
3-If none of the above, please tell me how to get the IMEI back ?
Thanks in advance for whoever tries to help.