efs problem (emergency calls only) I used to do a full factory wipe then flashed a stock firmware with Odin, that helped me get back to having access to my mobile network then I flashed to Resurrection Remix 5.5.3 and lost access to my mobile network (Emergency Calls Only) I checked my IMEI and it appears to be valid. I didn't backup my /efs I didn't do anything to it. What seems to be the solution? I have a Samsung Galaxy S3 (I-9300)
Back when I owned a Samsung phone this too would happen to me. I would have to flash a stock TW based rom and see if the network connection comes back. If so, I would boot into recovery and make a backup of EFS. Then reflash the custom rom, Then restore the EFS backup after you flashed the custom rom.