I think my efs folder is corrupted because under settings it shows my serial number as "0000000" even though my IMEI is correct.
I don't have a efs folder backup. However when I updated another S3 I9300 I own to the same rom, it all worked well.
- My IMEI is correct
- My serial number is 00000
- It says "emergency calls only" and can not get signal
- I tried to restore the stock firmware through Odin but nothing changed
How can I fix my problem and get phone signal back?