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[Q] Downgrading from CM11 M2 KitKat to TW 4.1.2

16th January 2014, 10:07 AM |#1  
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Hi guys,

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?

Thank you
 
 
16th January 2014, 10:28 AM |#2  
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Yes, factory reset and format internal media before you restore. I did the exact same thing (back to 4.3) last night after trying 4.4 for an hour, too many things don't work in Kitkat.

Make sure your 4.1.2 was at least EMG4 or later to avoid efs problems.

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Last edited by boomboomer; 16th January 2014 at 10:31 AM.
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16th January 2014, 10:39 AM |#3  
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Quote:
Originally Posted by bednim

Hi guys,

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?

Thank you

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.
Last edited by ~DemonLord~; 16th January 2014 at 10:41 AM.
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16th January 2014, 10:53 AM |#4  
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thanks a lot for your responses guys!

I have formated cache and dalvik, formated data and system and hit restore afterwards.

Worked a treat!

Downgraded to EMC2. No problems with IMEI or phone calls.

Everything works fine.
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