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Fix for people with a corrupt EFS (No network connection or bluetooth)

3rd August 2014, 01:39 AM |#1  
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A few people have had issues with the EFS getting corrupt or wiped on their OPO before they had a working backup. This guide has so far worked for 4 people to restore their EFS allowing them to access mobile data and bluetooth again.

Note: I really don't know why this works, I have contacted the dev of this rom to ask if he has any ideas but still waiting on a response.

1. Flash official TWRP
2. Flash this ColorOS rom using TWRP - http://forum.xda-developers.com/show....php?t=2772627 (you can skip all the account setups if you want)
3. Factory reset
4. Boot and setup ColorOS (you should see a network connect now with your sim card inserted, you will need to toggle mobile data on to test that)
5. If you have data in ColorOS you are good to flash back to CM11S anyway you want (you will need to factor reset after flashing back)
6. Save yourself the headache in the future and backup your EFS

Please post if this fix works for you.


Edit: I've went ahead and downloaded the ROM and I will hold on to it incase the original mirrors go down for some reason. Please PM me if they do.
Last edited by tw1tch175; 3rd August 2014 at 05:18 PM.
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3rd August 2014, 02:58 AM |#2  
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One of the ones who can confirm this works. Will post in the official thread.
3rd August 2014, 04:43 AM |#3  
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Worked for me also.
3rd August 2014, 12:27 PM |#4  
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Wholy moly ... I have a mobile data network !!

Still on ColorOS, but this is VERY promising !!!

IMEI is correct, it's the one on the box !

Still no WiFi nor Bluetooh mac addresses, though...

Will keep you posted, but this is a HUGE step forward !

Thanx a lot for sharing this !

BTW, serial number is still unchanged and correct.

JP.

EDIT:

Unfortunately it didn't fix my issue, back to CM11S I am greeted by an AudioFX FC... Device pretty much unusable, the FC pops up the milisecond you click OK ...

Will try a different ROM...

EDIT 2:

SlimKat, CM11 Nightly both boot to the welcome screen, then reboot about 1 second later.

Only ColorOS seems to actually run ?!

A bit disgusted right now
Last edited by Yank555; 3rd August 2014 at 01:35 PM.
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3rd August 2014, 04:35 PM |#5  
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Quote:
Originally Posted by tw1tch175

A few people have had issues with the EFS getting corrupt or wiped on their OPO before they had a working backup. This guide has so far worked for 3 people to restore their EFS allowing them to access mobile data and bluetooth again.

Note: I really don't know why this works, I have contacted the dev of this rom to ask if he has any ideas but still waiting on a response.

1. Flash official TWRP
2. Flash this ColorOS rom using TWRP - http://forum.xda-developers.com/show....php?t=2772627 (you can skip all the account setups if you want)
3. Factory reset
4. Boot and setup ColorOS (you should see a network connect now with your sim card inserted, you will need to toggle mobile data on to test that)
5. If you have data in ColorOS you are good to flash back to CM11S anyway you want (you will need to factor reset after flashing back)
6. Save yourself the headache in the future and backup your EFS

Please post if this fix works for you.

Hi, i failed and i wiped EVERYTHING of my phone, i only had the fasboot mode, i installed CWM and the cyanogemod rom, now everything works, and i have the imei in the box, however, i dont have the possibility of EFS backup anymore.... any ideas..?
3rd August 2014, 04:54 PM |#6  
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Quote:
Originally Posted by Gambalajillo

Hi, i failed and i wiped EVERYTHING of my phone, i only had the fasboot mode, i installed CWM and the cyanogemod rom, now everything works, and i have the imei in the box, however, i dont have the possibility of EFS backup anymore.... any ideas..?

Official TWRP doesn't have EFS backup in it, you have the get the unofficial one http://forum.xda-developers.com/onep...7-1-0-t2815247


Quote:
Originally Posted by Yank555

Wholy moly ... I have a mobile data network !!

Still on ColorOS, but this is VERY promising !!!

IMEI is correct, it's the one on the box !

Still no WiFi nor Bluetooh mac addresses, though...

Will keep you posted, but this is a HUGE step forward !

Thanx a lot for sharing this !

BTW, serial number is still unchanged and correct.

JP.

EDIT:

Unfortunately it didn't fix my issue, back to CM11S I am greeted by an AudioFX FC... Device pretty much unusable, the FC pops up the milisecond you click OK ...

Will try a different ROM...

EDIT 2:

SlimKat, CM11 Nightly both boot to the welcome screen, then reboot about 1 second later.

Only ColorOS seems to actually run ?!

A bit disgusted right now

Odd, maybe you could try using TWRP to delete everything again including system, then sideload and boot ColorOS.
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3rd August 2014, 04:56 PM |#7  
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Quote:
Originally Posted by tw1tch175

Official TWRP doesn't have EFS backup in it, you have the get the unofficial one http://forum.xda-developers.com/onep...7-1-0-t2815247

To add to that you can just boot the unofficial recovery using "fastboot boot recovery.img" to do your efs backup if you would prefer to keep the official TWRP installed. That way it only boots that recovery to allow you to do the backup of your EFS partition and doesn't erase your current recovery. That's how I did it.
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3rd August 2014, 05:04 PM |#8  
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Quote:
Originally Posted by sabbotage

To add to that you can just boot the unofficial recovery using "fastboot boot recovery.img" to do your efs backup if you would prefer to keep the official TWRP installed. That way it only boots that recovery to allow you to do the backup of your EFS partition and doesn't erase your current recovery. That's how I did it.

WOW thanks, i do it and and i tell you how did it go in a few minutes.
4th August 2014, 07:10 PM |#9  
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I see that the OP has been thanked and this thread has a few success stories so I am giving it a bump for others to view in case of the same issue.
4th August 2014, 07:45 PM |#10  
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I just flashed the factory image... I never had the problem again
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