Originally Posted by bednim
Can I perform downgrade simply by just restoring backup of 4.1.2, created with latest CWM?
Or do I need to do it via Odin?
I rather do it from backup to save my time on restoring phone with all apps and customisation...
Please could you advise?
Backup is the easiest thing to restore from as it replaces everything on your current rom including the rom itself. BUT i wouldnt advise that as it may cause IMEI problems encountered when downgrading from 4.3 to lower due to the format of the efs being changed(which is modem related). Your phone would no longer receive calls etc.
Ive personally experienced this by flashing a 4.1.2 rom over a 4.3. As for a restore i am very sure it will not cause a problem but it can. In any case you can backup your efs partition by various programs and then restore by nandroid. If any problem occurs then restore your efs partition or upgrade to 4.3 again and flash MG4 modem.