Samsung S3 i9305 no service after Cyanogenmod 11 flash

[WildWind]

Hi all,

My Galaxy S3 was updated to Cyanogenmod 11 / Kitkat After that I couldnt get service from my Sim card.

Could someone please tell me if I could revert it back to the stock ROM and radio?

Thanks.

 

[Madbat]

Hi all,

My Galaxy S3 was updated to Cyanogenmod 11 / Kitkat After that I couldnt get service from my Sim card.

Could someone please tell me if I could revert it back to the stock ROM and radio?

Thanks.

Did you make a backup of stock before you flashed cyanogen? (Always backup first) if yes just restore your backup in recovery.

 

[WildWind]

Did you make a backup of stock before you flashed cyanogen? (Always backup first) if yes just restore your backup in recovery.

No back up of this particular phone but I have the stock ROM from SamMobile. I have read other people restored the phone with the stock ROM but still have no service due to incorrect radio.

 

[Madbat]

No back up of this particular phone but I have the stock ROM from SamMobile. I have read other people restored the phone with the stock ROM but still have no service due to incorrect radio.

Never flash anything without first making a backup. Root basics. But if you have the CORRECT firmware from sammobile, then go ahead and flash it with Odin.

 

[funkylogik]

Youve maybe lost your EFS file. Check in settings, about phone, status and see if your IMEI (dont post it here) has a load of zeros in it

 

[WildWind]

Youve maybe lost your EFS file. Check in settings, about phone, status and see if your IMEI (dont post it here) has a load of zeros in it

I think the IMEI and modem radio is lost or blank. The procedure to retrieve these is a bit cumbersome

 

[funkylogik]

I think the IMEI and modem radio is lost or blank. The procedure to retrieve these is a bit cumbersome

In that case, your best option is to just reflash stock firmware using odin and hope that it fixes it i think.
Then, after you reroot, backup EFS using either the ktool app by hellfire or using your recovery then if you flash another rom and lose your efs file, you can easily restore it

 

[BynoUK]

Good luck, that scenario can be a right pain to sort out.

 

[WildWind]

Good luck, that scenario can be a right pain to sort out.

Thanks, I will do that.

 

[artbytes]

Did you make a backup of stock before you flashed cyanogen? (Always backup first) if yes just restore your backup in recovery.

How do you backup stock? Thanks.

 

[funkylogik]

How do you backup stock? Thanks.

What custom recovery are you using?

 

[Madbat]

How do you backup stock? Thanks.

Usually flash a custom recovery first. Then make a backup of stock ROM in recovery.