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[Q] EFS folder corrupted, no signal, how can I fix?

30th March 2014, 09:12 AM   |  #1  
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I updated my Galaxy S3 I9300 to Android 4.3 MK6 and now I'm unable to make phone calls.
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.
To summarize:
  • 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?
30th March 2014, 02:41 PM   |  #2  
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Search and read, sticky in general forum.

Hundreds of identical threads.

Sent from my GT-I9300 using Tapatalk
31st March 2014, 01:57 PM   |  #3  
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Flash a standalone Modem package through Odin XXEMG4+
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