Develop Bugs

Efs folder doesn't exist

Hello.
Sorry for language mistakes, I don't learn english too much
About 2 months ago I missed imei by flashing custom rom. I thought that warranty is missed too, but service repaired my phone (at least I thought like that).
Now I want to backup efs folder, but it isn't existing . I searched with root explorer and it didn't show any efs folder.
It is surprise, that after typing *#06# phone show correct imei.
How can I create efs folder or backup imei without efs?
Sent from my GT-S5660 using xda app-developers app

U cant access efs through ur phone(i mean using root explorer u cant backup efs folder) U will need to use ADB to backup although it is not needed to backup efs because custom rom only flashes the modifed firmware it does not flash baseband,imei etc. Only thing is u need to be careful with doing this kind of things.
Press thanks if helped.

That's it.
You can use EFS Backup. I strongly recommend it.
Sent from my GT-I9100 using xda app-developers app

batman38102 said:
U cant access efs through ur phone(i mean using root explorer u cant backup efs folder) U will need to use ADB to backup although it is not needed to backup efs because custom rom only flashes the modifed firmware it does not flash baseband,imei etc. Only thing is u need to be careful with doing this kind of things.
Press thanks if helped.
Click to expand...
Click to collapse
I know that custom rom doesnt change or remove imei, but what will I do if imei is corrupted like it happened few months ago?
H3llwar said:
That's it.
You can use EFS Backup. I strongly recommend it.
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
Do you mean Efs Pro? I tried to use efs pro but as I said programme didnt find any files to backup.
Sent from my GT-S5660 using xda app-developers app

Walentyn15 said:
I know that custom rom doesnt change or remove imei, but what will I do if imei is corrupted like it happened few months ago?
Do you mean Efs Pro? I tried to use efs pro but as I said programme didnt find any files to backup.
Sent from my GT-S5660 using xda app-developers app
Click to expand...
Click to collapse
I do.

Efs folder backup?

Hi, I stupidly went back to stock and lost my imei number without making a efs backup, when I used aroma it asked if I wanted to make an efs backup and I said yes.
Would that backup help me in returning fully to stock rom? If so, where would that backup be stored in my phone?
Hope someone can help
Thanks a lot
Sent from my GT-N7100 using xda premium

I must add that I didnt back up on the stock rom, I was already on a custom rom, if that helps.
Many thanks
Sent from my GT-N7100 using xda premium

dazza_84 said:
Hi, I stupidly went back to stock and lost my imei number without making a efs backup, when I used aroma it asked if I wanted to make an efs backup and I said yes.
Would that backup help me in returning fully to stock rom? If so, where would that backup be stored in my phone?
Hope someone can help
Thanks a lot
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
The backup you made will be no good cause it will contain the efs of the new rom you installed.. you can check though. The efs backup will be on your sd card..
Sdcard/EFS
In efs theres folders inc imei wifi bluetooth etc
Sent from my GT-N7105 using xda premium

Do I have to be rooted to see that folder? As its not in my sd card, the only way I can see that folder is in root explorer but im not rooted at the moment.
Can I ask one more question? If I were to put stock rom back on my phone and use newer modem, my imei and network will come back, would I be able to get ota updates? Because when ive tried to search for an update, it would just hang on searching.
Sent from my GT-N7100 using xda premium

Ive had a look in the efs folder and all I have is a list of files which include nv.data.bak and nv data.bak md5? Is tjat any help? Would I need those files to restore
Sent from my GT-N7100 using xda premium

dazza_84 said:
Ive had a look in the efs folder and all I have is a list of files which include nv.data.bak and nv data.bak md5? Is tjat any help? Would I need those files to restore
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
Yes. Copy them to your pc under efs backup aswell for safe keeping. There are guides on here of how to restore your efs with 4.1.2 roms but you will need root.
As you have efs backup I found this for you. Make sure you read and understand before doing anything..
http://forum.xda-developers.com/showthread.php?p=37816367
Sent from my GT-N7105 using xda premium

right well I backed up my efs through efs pro, it saved as a tar.gz file now ive tried to restore the efs in efs pro but it doesn't show in the restore older?
is there anyway I can flash the tar.gz file of my efs backup somehow?
also the link u gave me was for a zip file but no instructions of how to do anything.
thanks for any help

dazza_84 said:
right well I backed up my efs through efs pro, it saved as a tar.gz file now ive tried to restore the efs in efs pro but it doesn't show in the restore older?
is there anyway I can flash the tar.gz file of my efs backup somehow?
also the link u gave me was for a zip file but no instructions of how to do anything.
thanks for any help
Click to expand...
Click to collapse
That zip file in the link is a app. Download install.. if you backed up the efs on the stock rom before flashing the new rom it will work..
The only other thing to do is flash this modem via cwm recovery.
It says it fixes the problem
http://forum.xda-developers.com/showthread.php?p=42802840
Sent from my GT-N7105 using xda premium

I think ive messed my phone up!!! ive somehow deleted everything in my efs folder.
I still have a back up from efs pro? can I use that to restore my efs? if so how??
please help, im screwed

You've backed up the new modified efs folder which is only compatible with the new firmwares. You can restore from that backup, in fact you need to, but there is no going back to old firmware now. You can achieve stock if you download and flash a stock rom of version DME6 or newer, but you can never use anything older again.
-- Sent from the mighty Note 2 --

dr.m0x said:
You've backed up the new modified efs folder which is only compatible with the new firmwares. You can restore from that backup, in fact you need to, but there is no going back to old firmware now. You can achieve stock if you download and flash a stock rom of version DME6 or newer, but you can never use anything older again.
-- Sent from the mighty Note 2 --
Click to expand...
Click to collapse
How would I go about restoring that backup from efs pro? As when I am trying to select it in the restore section of efs pro it can not be seen in drop down box?
It is in tar format, there is a pit file with it but I guess as I wiped everything out of my actual efs folder through root explorer it might not work.
Also I have a pop up on my screen with loads of different information like an error pop up? I cant screen shot it other wise I would show u
Sent from my GT-N7100 using xda premium

dazza_84 said:
How would I go about restoring that backup from efs pro? As when I am trying to select it in the restore section of efs pro it can not be seen in drop down box?
It is in tar format, there is a pit file with it but I guess as I wiped everything out of my actual efs folder through root explorer it might not work.
Also I have a pop up on my screen with loads of different information like an error pop up? I cant screen shot it other wise I would show u
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
You're in factory mode. I can't help you restore as I don't use efs pro.
-- Sent from the mighty Note 2 --

as its in tar format cant I just use that in odin to flash in pda bit? also would flashing a df1 modem help restore my efs? im so tired of this I was up until 6 in the morning trying to fix it :-0

Phone is completely messed!! Please help with efs restore

Hi, ive accidently wiped my efs files through root explorer, now my phone has no imei or serial number, im in factory mode as well.
I do have a backup of my efs in tar format which I done through efs pro, but when im trying to restore it in efs pro its not locating the file?
Ive tried numerous things to rectify this, ive flashed the tar file in odin that didnt work.
I honestly dont know what to do???
I hope someone can please help me fix this as I have no phone
Thanks very much
Sent from my GT-N7100 using xda premium

dazza_84 said:
Hi, ive accidently wiped my efs files through root explorer, now my phone has no imei or serial number, im in factory mode as well.
I do have a backup of my efs in tar format which I done through efs pro, but when im trying to restore it in efs pro its not locating the file?
Ive tried numerous things to rectify this, ive flashed the tar file in odin that didnt work.
I honestly dont know what to do???
I hope someone can please help me fix this as I have no phone
Thanks very much
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
Try unpacking the tar.gz, copy the the efs map to the root with the original name ofcourse(With Root Explorer AND WITH READ WRITE PERMISSION!), then reboot. I've had the same situation as you do, this was the only fix for me.

Thanks for reply, I got efs pro to work in the end but my phone is still ****ed it has no imei or serial number? Ive been looking for a solution all day.
Its also still in factory mode it says h/w not active and rf cal date unknown.
I also tried what u said and it says theres not enough space in the folder when I copy it? Its an efs.img file? And its 20mb in size. I swear if I get this sorted im never rooting my phone again.
Sent from my GT-N7100 using xda premium

dazza_84 said:
I also tried what u said and it says theres not enough space in the folder when I copy it? Its an efs.img file? And its 20mb in size. I swear if I get this sorted im never rooting my phone again.
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
You might need to repartition the phone using a PIT file if you completely removed the folder (and not just the contents).
Reinstall your stock rom using a PIT file in ODIN and after the restoration is done try to restore your EFS again. It should work now!
Cheers!

vladeco said:
You might need to repartition the phone using a PIT file if you completely removed the folder (and not just the contents).
Reinstall your stock rom using a PIT file in ODIN and after the restoration is done try to restore your EFS again. It should work now!
Cheers!
Click to expand...
Click to collapse
I tried what u said but that didn't work, my imei is still 400000? Im not sure if I fixed my serial number though cos it was 0000000 , I changed it in root explorer and it stuck! it hasnt changed back to 000000 so now I think I just need to change my imei back but how do I do that if obviously it seems like my efs backup is corrupt as well?
Sent from my GT-N7100 using xda premium

Armazia said:
Try unpacking the tar.gz, copy the the efs map to the root with the original name ofcourse(With Root Explorer AND WITH READ WRITE PERMISSION!), then reboot. I've had the same situation as you do, this was the only fix for me.
Click to expand...
Click to collapse
I'm having almost the exact same problem as OP. 2 questions. When you say "copy the efs map" what do you mean by that? All the contents of my unpacked efs .tar.gz backup file? Also, what do you mean by "with the original name"? Thanks!

After restoring the rom with a pit file, did you try restoring the EFS using EFSPro? You should be able to do it just using the restore option in that app, although you should be rooted to be able to restore it.
And what do you mean by "put it back using root explorer?"
Sent from my GT-N7100

vladeco said:
After restoring the rom with a pit file, did you try restoring the EFS using EFSPro? You should be able to do it just using the restore option in that app, although you should be rooted to be able to restore it.
And what do you mean by "put it back using root explorer?"
Sent from my GT-N7100
Click to expand...
Click to collapse
Yeah after flashin a stock rom with pit file I used efs pro to restore the backup but that didnt work, I can only assume that the back up is corrupt as well? Basically I deleted everything in my efs folder so that I wiped my imei and serial number, my imei is 4000000 and serial number is 0000000, so what I done was change my serial number in root explorer from 0000000 to my actual serial number which is behind my battery, ive rebooted and flashed another stock rom since then and it hasnt changed, but my imei is still ending with 400000.
So if my backup is corrupt? I have no idea what my options are? Ive had nothing but a headache the last 2 days trying to fix it.
Many thanks
Sent from my GT-N7100 using xda premium

dazza_84 said:
Yeah after flashin a stock rom with pit file I used efs pro to restore the backup but that didnt work, I can only assume that the back up is corrupt as well? Basically I deleted everything in my efs folder so that I wiped my imei and serial number, my imei is 4000000 and serial number is 0000000, so what I done was change my serial number in root explorer from 0000000 to my actual serial number which is behind my battery, ive rebooted and flashed another stock rom since then and it hasnt changed, but my imei is still ending with 400000.
So if my backup is corrupt? I have no idea what my options are? Ive had nothing but a headache the last 2 days trying to fix it.
Many thanks
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
Did you root after restoring the backup? And did you also enable USB debugging? As I recall, EFSPro requires those to work optimally. And one last thing: did you use the latest version?

I rooted before I restored on efs pro, also what do mean by using latest version? If u mean stock rom? I used DMC3-BTU, thats the only one I had on my computer at the time, I flashed that with a pit file dated 2/11/2012?? Then I rooted and tried to restore the phone but it didnt work? I then thought as the firmware was old I would put a DF1 modem on it but that still didnt work either? Am I doing something wrong? Im going out my mind trying to sort this out!
Thanks alot
Sent from my GT-N7100 using xda premium

Oh also I restored on old version of efs pro I think it was version 1.93 or summink, as that is the only version that will locate the backup file in the drop down menu?? I just tried the version in the link u gave me but still same? It recognises my phone but when I use the restore drop down bit it is blank? I try to refresh but still blank?? I think it might have something to do with the restore file not being in tar.gz format? I somehow unzipped it and now its just a tar file? I dont know how to rezip the file? Any ideas please would be great.
Thanks
Sent from my GT-N7100 using xda premium

What are the contents of the tar.gz? I mean: if you open it with winrar / 7z, etc, what do you see?
For instance, when I open my EFS tar.gz backup, I see a single file called efs.img:
If you have that as well, you could try restoring your EFS using DD by putting the EFS.img in the root of your SD card and typing the following commands on ADB Shell:
Code:
adb shell su -c "dd if=/sdcard/efs.img of=/dev/block/mmcblk0p3 bs=4096"

Well ive repackaged the tar file to tar.gz and now efs pro has located the file but I click restore and a pop up comes onto the screen saying *you must select one partition to restore???? I dont know what that means??
Sent from my GT-N7100 using xda premium

dazza_84 said:
Well ive repackaged the tar file to tar.gz and now efs pro has located the file but I click restore and a pop up comes onto the screen saying *you must select one partition to restore???? I dont know what that means??
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
Just breathe and select the checkbox on the left:

Yeah mines the same in the tar file is a efs.img file, but im so close with efs pro I just dont get what *you must select at least one partition to restore* means?
Sent from my GT-N7100 using xda premium

Theres nothing in that box to select and if u see on the right drop down box your file says device, mine says PC?
Sent from my GT-N7100 using xda premium

dazza_84 said:
Theres nothing in that box to select and if u see on the right drop down box your file says device, mine says PC?
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
That means where the backup is located. Mine is on my phone's memory, yours is in your PC's hard drive.

It worked!!! Cant thank you enough for helping me out, really appreciate it, thank you so much.
Sent from my GT-N7100 using xda premium

dazza_84 said:
It worked!!! Cant thank you enough for helping me out, really appreciate it, thank you so much.
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
Great! Happy for you, buddy! Cheers!

Armazia said:
Try unpacking the tar.gz, copy the the efs map to the root with the original name ofcourse(With Root Explorer AND WITH READ WRITE PERMISSION!), then reboot. I've had the same situation as you do, this was the only fix for me.
Click to expand...
Click to collapse
I had the exact same problem and couldn´t get it to work.so I tried what you described and it worked.
I got my IMEI back but i couldn´t get the phone to connect to a cellular network.
So I rebooted ion to revocery and did a "fix Permissions". it took forever but after that my phone worked lika new again.
A million thanks to you.

how to safely backup m919 efs folder?

hi guys,
i have an sgh-m919 and i need to backup my efs folder in case i lost my IMEI to be able to recover it ?
my device on jelly bean 4.2.2
build : JDQ39.M919UVUAMDL
and it is rooted...

Make a backup with CWM or TWRP recovery.
☞ Sent from here☜???

Please use Andromizer Pro . in tools section you will see IMEI BACKUP OR use TWRP. i use both to be on safe side because i lost IMEI one time .

inder07 said:
Please use Andromizer Pro . in tools section you will see IMEI BACKUP OR use TWRP. i use both to be on safe side because i lost IMEI one time .
Click to expand...
Click to collapse
When I try to use TWRP it says 0MB backed up. Then the recovery file it creates is like 300kb
Is that right?

Skipjacks said:
When I try to use TWRP it says 0MB backed up. Then the recovery file it creates is like 300kb
Is that right?
Click to expand...
Click to collapse
Same here but mine only show 92kb. It does show 3 files in the folder.
☞ Sent from here☜???

milan guy said:
hi guys,
i have an sgh-m919 and i need to backup my efs folder in case i lost my IMEI to be able to recover it ?
my device on jelly bean 4.2.2
build : JDQ39.M919UVUAMDL
and it is rooted...
Click to expand...
Click to collapse
You can use CWM, TWRP, Andromizer Pro, or EFS Pro. Quickest method is EFS Pro. Good luck.
Sent from my SGH-M919 using XDA Premium 4 mobile app

baseballfanz said:
Same here but mine only show 92kb. It does show 3 files in the folder.
☞ Sent from here☜???
Click to expand...
Click to collapse
So that is correct? I have properly backed it up? And if I ever break it I cam just restore that backup file in recovery and it'll work?
Sent from your phone. You should be more careful where you leave that thing.

Skipjacks said:
So that is correct? I have properly backed it up? And if I ever break it I cam just restore that backup file in recovery and it'll work?
Sent from your phone. You should be more careful where you leave that thing.
Click to expand...
Click to collapse
I'm not 100% sure as I've never had to restored it. When I was using Philz recovery the efs backup was like 50kb. Might try one of the other tool and compare.
☞ Sent from here☜???

[Q] EFS folder

flipping the device with a root explorer, I can not find it.
Where it is located?
sorry for my english

reking71 said:
flipping the device with a root explorer, I can not find it.
Where it is located?
sorry for my english
Click to expand...
Click to collapse
I have it in both root of SD and the "0" folder. EFS_BACKUPS if done in TWRP. If you did it with FreeGee then in root freegee.
Sent from my LG-LS970 using XDA Premium 4 mobile app

engine95 said:
I have it in both root of SD and the "0" folder. EFS_BACKUPS if done in TWRP. If you did it with FreeGee then in root freegee.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
ok folder present, thanks to freegee " EFS_BACKUPS "
but I can not display the root folder efs, which is why I ask if compared to the samsung has a different path

reking71 said:
ok folder present, thanks to freegee " EFS_BACKUPS "
but I can not display the root folder efs, which is why I ask if compared to the samsung has a different path
Click to expand...
Click to collapse
The root folder efs? I believe it is different from Samsung. Searching for mk9efs from system root led me here - /dev/block/platform/msm_sdcc.1/by-name/ . Searching for efs from the system root doesn't supply much, the location I just posted and a few other folders like efs-bridge. Now I may be wrong on this, @engine95 knows more than I, but I am under the impression that our efs are on 3 separate partitions and may not be accessible from a root file explorer. I don't think we have a root efs "folder". Again, I am NOT 100% on this and could be completely wrong.......

HPTesla said:
The root folder efs? I believe it is different from Samsung. Searching for mk9efs from system root led me here - /dev/block/platform/msm_sdcc.1/by-name/ . Searching for efs from the system root doesn't supply much, the location I just posted and a few other folders like efs-bridge. Now I may be wrong on this, @engine95 knows more than I, but I am under the impression that our efs are on 3 separate partitions and may not be accessible from a root file explorer. I don't think we have a root efs "folder". Again, I am NOT 100% on this and could be completely wrong.......
Click to expand...
Click to collapse
I'm not quite sure what he's asking.
The EFS backup with TWRP creates an "EFS folder with 3 files in it.
And if I remember right... @HPTesla is right. EFS is in 3 partitions. One of them is actually empty, but is still needed.
You can see the mk9efs files in the folder but that's it. Im guessing FreeGee and TWRP are basically just taking a picture of the partitions.
So to the OP, are you trying to make sure the files are there? Or are you trying to access the files in there?
Sent from my LG-LS970 using XDA Premium 4 mobile app

HPTesla said:
/dev/block/platform/msm_sdcc.1/by-name/ .
Click to expand...
Click to collapse
this is what I wondering.
where he was physically the folder efs
Thanks

How do you restore the efs backups made with twrp?
Sent from my LG-LS970 using xda app-developers app

ThatKawaiiGuy said:
How do you restore the efs backups made with twrp?
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
? You should be able to do it from within TWRP. It depends on the version of TWRP you are using, 2.5.0.0 has been the most stable for this phone in my experience. It's an option in my backup and restore that I can check/uncheck. However, TWRP 2.6.3.0+ is needed to flash almost all 4.4 based roms and the options are different.

HPTesla said:
? You should be able to do it from within TWRP. It depends on the version of TWRP you are using, 2.5.0.0 has been the most stable for this phone in my experience. It's an option in my backup and restore that I can check/uncheck. However, TWRP 2.6.3.0+ is needed to flash almost all 4.4 based roms and the options are different.
Click to expand...
Click to collapse
My efs got jacked up and twrp didn't wanna detect my backup
Sent from my LG-LS970 using xda app-developers app

ThatKawaiiGuy said:
My efs got jacked up and twrp didn't wanna detect my backup
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
If you are still using the same TWRP version you used to make the backup but switched to an AOSP based rom it appears as if the backup disappeared. The backup is located in /data/media/TWRP but TWRP will look in /data/media/0/TWRP. You can copy the old backup to the 0/TWRP folder and reboot recovery.
If you are using a different version of TWRP than the one you used to make the backup, your backup may also not show up. You should use the version you used to make the back up to restore it back. I hope this helps.

HPTesla said:
If you are still using the same TWRP version you used to make the backup but switched to an AOSP based rom it appears as if the backup disappeared. The backup is located in /data/media/TWRP but TWRP will look in /data/media/0/TWRP. You can copy the old backup to the 0/TWRP folder and reboot recovery. I hope this helps.
Click to expand...
Click to collapse
It was part of an OpTimuS backup, it was in the actual thing, like there were efs1.win, efs2.win, etc. But I select restore and it.doesn't show up, when it did yesterday
Sent from my LG-LS970 using xda app-developers app

ThatKawaiiGuy said:
It was part of an OpTimuS backup, it was in the actual thing, like there were efs1.win, efs2.win, etc. But I select restore and it.doesn't show up, when it did yesterday
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
It was on a stock based? And since it was there yesterday I doubt you are using a different TWRP. Ok I'm at a loss honestly....

HPTesla said:
It was on a stock based? And since it was there yesterday I doubt you are using a different TWRP. Ok I'm at a loss honestly....
Click to expand...
Click to collapse
I'm not having a problem anymore though. Stock works, so I just backed it up with freegee and restored
Sent from my LG-LS970 using xda app-developers app