[Q] s3 corrupt imei/no signal - Galaxy S III Q&A, Help & Troubleshooting

hi, recently i rooted my sgs3 , made a full backup using cwm but didnt backup my efs folder and flashed 4.2.2 PA rom which causes the phone to lose its imei and signal . instead of doing recovery procedures i tried to fix the problem by flashing other roms ( 4.2.2 leaked XXUFME7 , CM 10.2 , restored the backup and even tried the stock firmware ) and then tried many repair procedures and none of them worked!
1 - is there any way i can get my imei back ( like re-partition )
2 - any way i can extract my old efs folder from the backup
i am in pakistan so i cant send it to a trusted repair center because there arent any

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If you did flash MG4 previously
if you fash MG4 before the problem, try to flash again MG4. But if you did not flash the MG4 ever on your phone, try not to because it changes the structure efs. if you flash MG4, will no longer be possible to flash in a previous firmware. But if flash MG4 in a unit that had been flash with this firmware, it will again play the efs and will get right back imei

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The backup does not contain efs.
Sent from my GT-I9300 using Tapatalk 4

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osama94 said:
hi, recently i rooted my sgs3 , made a full backup using cwm but didnt backup my efs folder and flashed 4.2.2 PA rom which causes the phone to lose its imei and signal . instead of doing recovery procedures i tried to fix the problem by flashing other roms ( 4.2.2 leaked XXUFME7 , CM 10.2 , restored the backup and even tried the stock firmware ) and then tried many repair procedures and none of them worked!
1 - is there any way i can get my imei back ( like re-partition )
2 - any way i can extract my old efs folder from the backup
i am in pakistan so i cant send it to a trusted repair center because there arent any
Click to expand...
Click to collapse
Repartition will not solve your i have no EFS backup you need a service repair
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danilomazzaro said:
if you fash MG4 before the problem, try to flash again MG4. But if you did not flash the MG4 ever on your phone, try not to because it changes the structure efs. if you flash MG4, will no longer be possible to flash in a previous firmware. But if flash MG4 in a unit that had been flash with this firmware, it will again play the efs and will get right back imei
Click to expand...
Click to collapse
ive tried flashing mg4 , but it only brings up the 0049** generic imei not my original one and if i try modems before mg4 it says imei null/null

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Listen up you require a service centre you flashed with no EFS backup end of story .
You can of course read the thousands of identical posts for further information .
corrupt imei/no signal >> i did not backup my EFS
jje

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Are you doing full flash via odin? Id do that. If still not - repair. Local phone repair shop should be able to fix
Sent from my GT-I9300 using Tapatalk 4

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i did same thing ...only option you have is to send to samsung repair centre.....if its under warranty still???..Unless you know some one who can reflash the chip which contains all the firmware and efs files cause flashing through odin wont work as that only over writes the files....the phone simply needs to be reprogrammed from scratch...