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How to downgrade 4.3 ROM to 4.1 without losing IMEI/EFS

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Chrisamgad
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(Last edited by Chrisamgad; 22nd May 2014 at 11:50 PM.)
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Default How to downgrade 4.3 ROM to 4.1 without losing IMEI/EFS

I am a beginner and i have OMEGA ROM v57 4.3 and i want to downgrade it to another ROM,which is 4.1 but i have read alot of reports and threads with people losing their IMEI/EFS. I don't really know what should i do before downgrading.....
 
theronkinator
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I just flashed it with Odin, as long as you flash to an MG4 or above firmware it's fine, if you want to be safe then backup your EFS first.

This is a question so in the wrong section.
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Xperia U - Bootloader unlocked - Ported Sony JB
Galaxy S3 - Stock 4.1.2 ROM - Rooted - Xposed
Checkout my easy HP Touchpad Android installer:
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k-semler
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Backup your /efs partition, and downgrade to XXEMG4. You'll have a backup of your /efs partition just in case something went wrong, but it should still be readable.
Phone: Samsung SGS III International i9300
ROM: OmniROM Official NIGHTLY
Firmware: 4.4.4
Baseband: UBUGNF1
Bootloader: XXELLA
Kernel: 3.0.101 Boeffla-Kernel-2.4-beta2-Omnirom-NG-i9300-20140805@andip71 #1
O/C Level: 1600 MHz
Media Card: Samsung 64GB Class 10 MicroSDHC
Battery: 7000 mAh ZeroLemon
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Chrisamgad
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Thanks guys
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