Welcome to XDA

Search to go directly to your device's forum

Register an account

Unlock full posting privileges

Ask a question

No registration required
Post Reply

[Q] Downgrading from CM11 M2 KitKat to TW 4.1.2

OP bednim

16th January 2014, 11:07 AM   |  #1  
OP Member
Thanks Meter: 2
 
46 posts
Join Date:Joined: Jun 2012
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, 11:28 AM   |  #2  
boomboomer's Avatar
Senior Member
Thanks Meter: 729
 
3,338 posts
Join Date:Joined: Jun 2010
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.

Sent from my GT-I9300 using Tapatalk
Last edited by boomboomer; 16th January 2014 at 11:31 AM.
The Following User Says Thank You to boomboomer For This Useful Post: [ View ]
16th January 2014, 11:39 AM   |  #3  
~DemonLord~'s Avatar
Senior Member
Thanks Meter: 60
 
222 posts
Join Date:Joined: Jan 2014
More
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 11:41 AM.
The Following User Says Thank You to ~DemonLord~ For This Useful Post: [ View ]
16th January 2014, 11:53 AM   |  #4  
OP Member
Thanks Meter: 2
 
46 posts
Join Date:Joined: Jun 2012
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.
Post Reply Subscribe to Thread
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes