EFS Question - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

I restored a back up today using TWRP recovery and I had EFS checked although I should have had it unchecked because there's nothing wrong with my EFS. Everything works but my question is this;
Does the information in that folder ever change on its own? I would assume that it's read only and it doesn't change
Samsung Galaxy SIV
Graviton Rom
AusDim Kernel

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[SOLVED] BASEBAND "unkown" EMEI "unkown" - EFS Backup available

Hi all,
i had to use "Clear Phone EFS" in Odin to get my 9005 back working - i thought: "Hey no problem i have multiple EFS backups..."
But now even if i restore my backup in TWRP or via the Windows Batch Backup Script, my Baseband and EMEI and EMEISV is still "unkown"
Can s.o tell me the steps i need to do, to rewrite my Baseband and EMEI with my available EFS backups?
What i have:
- EFS Professional
- 2 different EFS backups in TWRP
- 2 windows back tool EFS backups (i mean this script: http://forum.xda-developers.com/showthread.php?t=2447342)
- Working WIFI
- Working BT
- Stock N9005XXUENA6_N9005OXXENA5_N9005XXUENA2_OXX file(s)
- Stock N9005XXUENB4_N9005DBTENB1_N9005XXUENB1_HOME file(s)
- Stock N9005XXUENB7_N9005DBTENB2_DBT file(s)
- Odin + 9005 PIT Files
- Correct SerialNumber in DeviceInformation->Status
I'm on the new Bootloader and KitKat OS
Thank you very much for all your help!
Best regards,
Chris
PROBLEM SOLVED!
Look here http://forum.xda-developers.com/showpost.php?p=51152510&postcount=4
Hundsbuah said:
Hi all,
i had to use "Clear Phone EFS" in Odin to get my 9005 back working - i thought: "Hey no problem i have multiple EFS backups..."
But now even if i restore my backup in TWRP or via the Windows Batch Backup Script, my Baseband and EMEI and EMEISV is still "unkown"
Can s.o tell me the steps i need to do, to rewrite my Baseband and EMEI with my available EFS backups?
...
Click to expand...
Click to collapse
On the N9005 the IMEI is no longer on the EFS partition (mmcblk0p11) but instead in some other partition - I think mainly in MS1 (mmcblk0p12) with something else (backup?) in MS2 (mmcblk0p13). There might be something else in mmcblk0p17, mmcblk0p18 and mmcblk0p19.
If you do not have any backup (including a larger "debrick backup" - search for that post) you can try to see which one of the partitions I listed above was supposed to be the backup of what; and if that fails there is a more complex procedure described somewhere in a thread on XDA - involving manually hex-editing your SN and IMEI from under the battery or the original box of the phone.
xclub_101 said:
On the N9005 the IMEI is no longer on the EFS partition (mmcblk0p11) but instead in some other partition - I think mainly in MS1 (mmcblk0p12) with something else (backup?) in MS2 (mmcblk0p13). There might be something else in mmcblk0p17, mmcblk0p18 and mmcblk0p19.
If you do not have any backup (including a larger "debrick backup" - search for that post) you can try to see which one of the partitions I listed above was supposed to be the backup of what; and if that fails there is a more complex procedure described somewhere in a thread on XDA - involving manually hex-editing your SN and IMEI from under the battery or the original box of the phone.
Click to expand...
Click to collapse
ok thank you - bad news
Ill try this guide: (Can this guide be used with KK 4.4.2 ?)
http://forum.xda-developers.com/showthread.php?t=2567133
What about the "unkown baseband"? How can this be fixed?
Ok a managed it to get all back working, incl. baseband, emei etc (but you need a twrp efs backup with all 3 efs partitions --> simply a twrp backup)
If some others have the same problem, here you go:
I think some other partition was corrupted and thats why the twrp efs restore didnt worked (just a twrp efs restore).
I did following: (you need a efs backup!!!)
Folow exactly this guide http://forum.xda-developers.com/showthread.php?t=2567133: and do all partitions, DONT! skip the efs partitions (we have a twrp backup)
Now some further steps are needed:
IMPORTANT:
1) When you put in back your battery, boot back into twrp and restore your TWRP EFS Backup!! Dont boot in the OS!!!!
2) Then reflash with odin a stock based rom without any other checkboxes (NO EFS PHONE CLEAR, NO NAND ERASE ALL!!!!), just a normal odin stock rom flash
3) Let the phone reboot into OS and YES: Baseband working again, EMEI working again
Bro whats a twrp efs backup?
Team win recovery Project. Its a revovery and a twrp efs Backup is a Backup from the 3 efs partitions in twrp
Gesendet von meinem SM-N9005 mit Tapatalk
Hundsbuah said:
Ok a managed it to get all back working, incl. baseband, emei etc (but you need a twrp efs backup with all 3 efs partitions --> simply a twrp backup)
If some others have the same problem, here you go:
I think some other partition was corrupted and thats why the twrp efs restore didnt worked (just a twrp efs restore).
I did following: (you need a efs backup!!!)
Folow exactly this guide http://forum.xda-developers.com/showthread.php?t=2567133: and do all partitions, DONT! skip the efs partitions (we have a twrp backup)
Now some further steps are needed:
IMPORTANT:
1) When you put in back your battery, boot back into twrp and restore your TWRP EFS Backup!! Dont boot in the OS!!!!
2) Then reflash with odin a stock based rom without any other checkboxes (NO EFS PHONE CLEAR, NO NAND ERASE ALL!!!!), just a normal odin stock rom flash
3) Let the phone reboot into OS and YES: Baseband working again, EMEI working again
Click to expand...
Click to collapse
Will a TWRP boot ,data and system backup work as well for restoring baseband? I have the same problem -> http://forum.xda-developers.com/showthread.php?t=2796948&page=6
No u need an efs backup
Gesendet von meinem SM-N9005 mit Tapatalk
Hundsbuah said:
No u need an efs backup
Gesendet von meinem SM-N9005 mit Tapatalk
Click to expand...
Click to collapse
So have I run out of options? Please have a look at my thread. The last few posts especially . Any help would be appreciated.
Please help sm-n900
Hundsbuah said:
Ok a managed it to get all back working, incl. baseband, emei etc (but you need a twrp efs backup with all 3 efs partitions --> simply a twrp backup)
If some others have the same problem, here you go:
I think some other partition was corrupted and thats why the twrp efs restore didnt worked (just a twrp efs restore).
I did following: (you need a efs backup!!!)
Folow exactly this guide http://forum.xda-developers.com/showthread.php?t=2567133: and do all partitions, DONT! skip the efs partitions (we have a twrp backup)
Now some further steps are needed:
IMPORTANT:
1) When you put in back your battery, boot back into twrp and restore your TWRP EFS Backup!! Dont boot in the OS!!!!
2) Then reflash with odin a stock based rom without any other checkboxes (NO EFS PHONE CLEAR, NO NAND ERASE ALL!!!!), just a normal odin stock rom flash
3) Let the phone reboot into OS and YES: Baseband working again, EMEI working again
Click to expand...
Click to collapse
just went to the above mentioned link but none of the multiupload files link work.
could you upload the NOTE 3 - Fix soft bricked.rar and the Samsung drivers.
I want to extract the NOTE 3 - Fix soft bricked.rar and modify it for use in sm-n900
Sorry I don't have these files anymore try to get them from the thread owner
Gesendet von meinem SM-N9005 mit Tapatalk
Hundsbuah said:
Ok a managed it to get all back working, incl. baseband, emei etc (but you need a twrp efs backup with all 3 efs partitions --> simply a twrp backup)
If some others have the same problem, here you go:
I think some other partition was corrupted and thats why the twrp efs restore didnt worked (just a twrp efs restore).
I did following: (you need a efs backup!!!)
Folow exactly this guide http://forum.xda-developers.com/showthread.php?t=2567133: and do all partitions, DONT! skip the efs partitions (we have a twrp backup)
Now some further steps are needed:
IMPORTANT:
1) When you put in back your battery, boot back into twrp and restore your TWRP EFS Backup!! Dont boot in the OS!!!!
2) Then reflash with odin a stock based rom without any other checkboxes (NO EFS PHONE CLEAR, NO NAND ERASE ALL!!!!), just a normal odin stock rom flash
3) Let the phone reboot into OS and YES: Baseband working again, EMEI working again
Click to expand...
Click to collapse
Hi, I have the same problem as you did, my baseband is showing unknown and the imei is showing null. This happened when I was installing a different modem via ODIN. I do have a EFS backup, however, it was done with philz recovery instead of TWRP and has 4 files ('efs.ext4.tar'; 'efs.ext4.tar.a'; 'nandroid.md5'; and 'recovery.log'). Are these the same that you would get with a TWRP?
I also have another efs backup that I did which is one file only, 'efs_20140531_122400.img'. Would I be able to use this for anything?
The phone is an N9005 on Kitkat.
Thanks for any help in advance and please let me know if you need any other info.
Cheers
--------------------------
Just to let you know,
I had tried flashing flash latest full UK NF4 system before and it didn't work. However, desperate as I was, I went again and gave it another shot and incredibly enough, it worked!!!! Phone is back together again!!!! Yeeahh!!! There goes an incredible load off my shoulders. I guess I did something in between that actually helped, we may never know.
Cheerio
Hundsbuah said:
Hi all,
i had to use "Clear Phone EFS" in Odin to get my 9005 back working - i thought: "Hey no problem i have multiple EFS backups..."
But now even if i restore my backup in TWRP or via the Windows Batch Backup Script, my Baseband and EMEI and EMEISV is still "unkown"
Can s.o tell me the steps i need to do, to rewrite my Baseband and EMEI with my available EFS backups?
What i have:
- EFS Professional
- 2 different EFS backups in TWRP
- 2 windows back tool EFS backups (i mean this script: http://forum.xda-developers.com/showthread.php?t=2447342)
- Working WIFI
- Working BT
- Stock N9005XXUENA6_N9005OXXENA5_N9005XXUENA2_OXX file(s)
- Stock N9005XXUENB4_N9005DBTENB1_N9005XXUENB1_HOME file(s)
- Stock N9005XXUENB7_N9005DBTENB2_DBT file(s)
- Odin + 9005 PIT Files
- Correct SerialNumber in DeviceInformation->Status
I'm on the new Bootloader and KitKat OS
Thank you very much for all your help!
Best regards,
Chris
PROBLEM SOLVED!
Look here http://forum.xda-developers.com/showpost.php?p=51152510&postcount=4
Click to expand...
Click to collapse
Hi Hundsbuah,
I upgraded my Note 3 9005 Hong Kong Version 32 GB from Jelly Bean to KitKat without taking backup of EFS and now I have IMEI Null and Baseband unknown. I found backup of other user's note3 EFS at "http://forum.xda-developers.com/showthread.php?t=2447342". So, if I tried EFS restore from above link will it resolve my IMEI null and baseband unknown issue?
Regards,
Asif

IMEI Unknown (have already efs backed up befor that)

Hello,
I want to say that my IMEI is unkown but I have already signal from carrier. It means that i did not lose signal.
I backed up the efs via philz recovery. see picture below. My efs folder is not empty. I already restored via philz recovery but it didnt fix my problem
Bordo_Bereli51 said:
Hello,
I want to say that my IMEI is unkown but I have already signal from carrier. It means that i did not lose signal.
I backed up the efs via philz recovery. see picture below. My efs folder is not empty. I already restored via philz recovery but it didnt fix my problem
Click to expand...
Click to collapse
Wich ROM are you using? If the lost IMEI appeared directly after a ROM flash, dirty flash it again. This should work.
Had the same problem when flashing a rom but If I left the device running for 5 mins then checked the imei was back. It did this at every reboot until I flashed a different rom
Sent from my GT-I9505 using XDA Premium 4 mobile app
I flashed stock firmware with pit and without pit, the IMEI remains unknown, even the efs folder is mounted and is not empty
i think i found the problem CSC: XXX i heard that csc had to do something with efs.
changed csc to ato (firmware is from ato =austria unbranded) imei is now there , thank you guys for the response!

Efs backup / restore

Guys i need a help here i flashed official rom for s4 i9500 , and i did efs backup ,,
after finishing flashing i cant get any signal and null/null IMEI .. now how to restore efs folder ??
anyone can help
My guess is your were on lollipop and flashed kitkat.
Flash a lollipop modem and your imei is back.
New Life said:
Guys i need a help here i flashed official rom for s4 i9500 , and i did efs backup ,,
after finishing flashing i cant get any signal and null/null IMEI .. now how to restore efs folder ??
anyone can help
Click to expand...
Click to collapse
If you did a backup then you should be able to restore that backup using the same method. Eg: If you used an app, that app should be able to restore the efs folder.
The problem with the EFS folder on the latest versions of Android is that it doesn't contain the IMEI, last time I checked. The IMEI is now stored in hidden partitions, which is why when it comes to backing up this important stuff I recommend Wanam's EFS Backup tool from the Play Store. Not only does it back up the EFS folder, but also backs up those hidden partitions as well as the modem..
In this instance however, Lennyz1988 I believe has the right answer.

no service only on non-samsung roms

Hey everyone
So my i9500 has this problem since while and that's really boring
When I install a stock Samsung ROM or a based one every thing is working correctly
But when installing a stock android based like cyanogen mod based ROMs I get no service
And I can't see me imei
I have lost my imei once and restored it by overwriting efs folder with that I had a copy of
And then flashed a modem and every thing went back normal
Since then no stock android based ROM doesn't have this problem
Tried flashing bootloaders modems nothing solve the problem
So please any help
Thanks
after 2 months of trying i finally solved it thanks any way it was about the way i restored my EFS with i've deleted the folder restored the 2 imei files can't remeber their names then flashed samsung stock took a backup with TWRP then removed the efs folder installed the rom wiped cache restored the back up installed gapps wiped cache the flashed a modem then wiped then restarted then every thing is working correctly

EFS folder deleted and not recoverable from TWRP backup - Verizon Note 4 N910V

Guys i need help as I have lost my EFS folder. Summary of how it happened is as below:
Initially I had Note 4 Verizon version running Lollipop 5.0.1
I used a method to turn it into Developer Edition (DE) and I was successful in doing that.
Once got through that I installed customer Recovery (TWRP) and made a backup for it (including EFS folder and everything else)
After that I got SUPERSU installed and root access to my mobile.
Everything until this point was smooth and no issues until I installed XPOSED FRAMEWORK and my mobile got stuck on the boot screen.
After alot of hit and tries I used TWRP for Factory reset and WiPE DATA.
Since then I was totally lost in a boot loop.
I used ODIN with official ROM (downloaded through SAMMOBILE) for my variant and restored the boot but again my mobile went back to stock version.
Now the problem is that my phone gives me a message "FACTORY MODE IS ON ........................................."
Now my WiFi turns OFF automatically and everytime I bootup my mobile I have to enter passcodes for WiFi every single time.
I have again got it into Developer Mode and got the root access as well but when I check the EFS folder using TWRP, ROOT EXPLORER or any other software which has access to root files I can see that EFS folder is empty.
I even tried restoring the backup through TWRP (first time complete and 2nd time only EFS folder). It shows success but still EFS folder is empty.
Now I need support if anyone can either help me with the EFS file or help me restore the EFS file that I have available through TWRP backup.
In desperate need of help because I have tried every method I can find on this forum or after google results but none is working...
Any support to help it work will be very helpful and save me from losing my only source of mobile communication.
ThankS!!!
Try this:
https://play.google.com/store/apps/details?id=ma.wanam.efs
It saved me before =)
ledzpg said:
Try this:
https://play.google.com/store/apps/details?id=ma.wanam.efs
It saved me before =)
Click to expand...
Click to collapse
Dear this is a software to backup already existing EFS folder whereas my efs folder is totally empty...
Need someone to help me either with Verizon note 4 efs folder or help me on how to recover already backed up efs folder through TWRP..
Hello, I have the same problem with my sm-n910t. have you found the solution.. it would be a big help. thanks in advance.
Find the efs file compatible for your phone from google and install it into your phone using Odin

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