Sim not detected (IMEI & EFS is not corrupt)
My brother has S3 which was working fine before this.
Today in morning he took out sim from it, the phone was off, and put sim in another phone. The phone was in the drawer the whole time and powered off.
So in evening he inserted sim, turned it on and it shows no sim detected. Did a bit reboots but no good.
I also have S3, so i took my sim and inserted it and it did not detect it.
His sim is working well in my cell phone but his cell phone is not detecting any sim, neither mine nor his.
I have checked for EFS and IMEI problem but both are intact, IMEI is not corrupt.
The phone is not even rooted, and it has 4.1.2 rom and it is the build before the MG4, and he has not even flashed since opening it from box.
Now i have no idea what should be done.
Can someone guide me in this matter?