Database Users

[Q] SM-N900 EFS nv_dat.bin corrupt EFS etc Pease HELP!!!!

I have a sm-n900 exynos and I have lost my imei and baseband during a Samsung flash. I have a TWRP backup, efs.img backup by dr.ketan's backup tool but nothing is able to restore my efs. I have scanned emmc blocks for bricked blocks and all blocks come back as non-corrupted. may be the partition is corrupted .how do I erase my efs partition to rebuild it. I have tired to flash PIT from ODIN but that too doesn't work.
tried this post http://forum.xda-developers.com/show...567133&page=36
but need a guide to identify the partitions and how to rebuild them. by any chance anyone know if I could extract twrp backup to files to restore efs or from efs.img so I can use the nv_data.bin, since tried restoring the backups and it didn't restore I feel the partition might be corrupt and hence not being re-written. so might be I have to rebuild the partitions by formatting as explained in this thread. but I don't know exactly the steps for exynos variant. I tried using terminal on twrp but mkef2 command shows mmbcblkp03 doesn't exist which as I have read in posts is the efs partition on this phone and reboots to twrp recovery. and mmbcblkp12 show filesystem too small and reboots to twrp recovery
Can some one upload sm-n900 efs folder may be can try and edit nv_data in hex editer

mithudas28 said:
I have a sm-n900 exynos and I have lost my imei and baseband during a Samsung flash. I have a TWRP backup, efs.img backup by dr.ketan's backup tool but nothing is able to restore my efs. I have scanned emmc blocks for bricked blocks and all blocks come back as non-corrupted. may be the partition is corrupted .how do I erase my efs partition to rebuild it. I have tired to flash PIT from ODIN but that too doesn't work.
tried this post http://forum.xda-developers.com/show...567133&page=36
but need a guide to identify the partitions and how to rebuild them. by any chance anyone know if I could extract twrp backup to files to restore efs or from efs.img so I can use the nv_data.bin, since tried restoring the backups and it didn't restore I feel the partition might be corrupt and hence not being re-written. so might be I have to rebuild the partitions by formatting as explained in this thread. but I don't know exactly the steps for exynos variant. I tried using terminal on twrp but mkef2 command shows mmbcblkp03 doesn't exist which as I have read in posts is the efs partition on this phone and reboots to twrp recovery. and mmbcblkp12 show filesystem too small and reboots to twrp recovery
Can some one upload sm-n900 efs folder may be can try and edit nv_data in hex editer
Click to expand...
Click to collapse
Could you provide more details about the backup you have:
- What files do you have? What is the name of these files, and also the file sizes?

vndnguyen said:
Could you provide more details about the backup you have:
- What files do you have? What is the name of these files, and also the file sizes?
Click to expand...
Click to collapse
I HAVE efs.img created my Dr. Ketan's EFS tool and which had worked succefully so presume it's a good copy, I have a completeTWRP backup of installed VNROM 13.1 which doesn't have the new baseband problem of NE3 in vnrom 14, and have used to rstore efs earlier and has worked successfully.
files I have
efs.img 20 Mb
attached screenshot of twrp backup

Deleted

georgesmh said:
Did u try to flash the previous modem?
Anyways this is an EFS backup
removed
Sent from my SM-N900 using Tapatalk
Click to expand...
Click to collapse
If that's your EFS back up, I'd remove it, or someone else is gonna enjoy your IMEI

radicalisto said:
If that's your EFS back up, I'd remove it, or someone else is gonna enjoy your IMEI
Click to expand...
Click to collapse
Haha damnn thanks dude I didnt know
Sent from my SM-N900 using Tapatalk

georgesmh said:
Haha damnn thanks dude I didnt know
Sent from my SM-N900 using Tapatalk
Click to expand...
Click to collapse
Keep your EFS info as private as you do your ATM card Pin number my friend :good:

georgesmh said:
Deleted
Click to expand...
Click to collapse
I know its risky but could you please please send me the efs, once my device gets its base band and is up and running i will restore my own efs backup. I dont need to use your iemi and trust me i wont. I would be grateful for to you pleade help me . Tou xould pm me the upload please. A beey veey himble and desperate request.

mithudas28 said:
I HAVE efs.img created my Dr. Ketan's EFS tool and which had worked succefully so presume it's a good copy, I have a completeTWRP backup of installed VNROM 13.1 which doesn't have the new baseband problem of NE3 in vnrom 14, and have used to rstore efs earlier and has worked successfully.
files I have
efs.img 20 Mb
attached screenshot of twrp backup
Click to expand...
Click to collapse
So it seems you have the correct backup for your device. Some more questions:
1- Can you show the link to the EFS tool you have used to make a backup?
2- What is your difficulty now? You don't know how to restore? Cannot restore? Or you already restored but the problem still persist?
Please be noted that you have to restore ALL efs-related partitions, NOT only 1 partition.
At the moment, my app 'IMEI Backup ★Samsung★' can only restore from the backup that has been made by it. But I will add the ability to restore from the backup which was made by other apps, may be in the next release.

vndnguyen said:
So it seems you have the correct backup for your device. Some more questions:
1- Can you show the link to the EFS tool you have used to make a backup?
2- What is your difficulty now? You don't know how to restore? Cannot restore? Or you already restored but the problem still persist?
Please be noted that you have to restore ALL efs-related partitions, NOT only 1 partition.
At the moment, my app 'IMEI Backup ★Samsung★' can only restore from the backup that has been made by it. But I will add the ability to restore from the backup which was made by other apps, may be in the next release.
Click to expand...
Click to collapse
yes i tried to restore both the baxkups and even the whole twrp backup but unfortunatly the system gets restored but not the imei. The link for the tool
https://play.google.com/store/apps/...+tool&pcampaignid=APPU_ALKrU4PHMMy5uAS4yYDYDA

mithudas28 said:
yes i tried to restore both the baxkups and even the whole twrp backup but unfortunatly the system gets restored but not the imei. The link for the tool
https://play.google.com/store/apps/...+tool&pcampaignid=APPU_ALKrU4PHMMy5uAS4yYDYDA
Click to expand...
Click to collapse
That means the above-mentioned app does not work correctly with the restoring job?
Has your phone been rooted? If yes, I will guide you some steps to restore manually.

Yes its rooted and has twrp recovery . It would be just great if you xould guide me
Sent from my SM-N900 using XDA Free mobile app

Hi , i have One question , is there a way to send the nv_data. Bin by adb command ?

request
Hi, please, can someone upload his efs.IMG from sm-n900 ?
I want to write it inside my phone to try with a box if it possible to write after my imei loosed.
I have null/null and no backup from telephone!

[Q&A] Restore EFS from Nandroid Failed (Solved)

Hi Everybody,
I'm really disappointed. For the second Times, I've corrupted my EFS partition. IMEI is empty, as the baseband...
The first time that I had this problem, I could restore the EFS using the fabulous fix from Fireasusman : http://forum.xda-developers.com/showthread.php?p=47014662#post47014662
But this time, It didn't work.... I'm really really sad.
Before trying to restore the stock firmware ( My problem was coming when i tried to restore stock firmware before to sell it) i made a Nandroid backup with TWRP recovery. I've an EFS/MODEM backup in this Nandroid.
When I reboot into recovery, and go to restore, I can select EFS, and it seems restore It. It wrote : Restoring 2 partitions/Restoring EFS/restoring EFS2/restoring EFS3/EFS Done/Restoring Modem/ Modem Done...
But after reboot the problem is Still There...
I'm really Angry, I lost 400$ and I don't understand why my Nandroid Restore of EFS failed...
I also try to flash modem with ODIN but it still Failed.
Note: I was an temasek CM12 (android lollipop).
Thank you very much for every help.

1. Flash STOCK ROM and take a look how it works. Sometimes only flashing it recovers the EFS folder.
2. Next time use this APP for backup/restore your EFS.

Really thanks for your help.
But i've allready try to restore stock ROM. At least twice. But efs is still corrupt. And the phone never arrive to boot...

About how many time I can consider that flash stock ROM will not repair my EFS partition ?
I've allready done twice...

Ok... I solved my problem.
As I explain in first post, I'had a EFS backup with a Nandroid Backup. But when I restore with TWRP, the problem was still there. No pin, No baseband etc...
I only delete the EFS folder using root explorer. I reboot, and it was OK. EFS folder was rebuilt automatically.... No more complicated than that...

Good finding

pystolero said:
Ok... I solved my problem.
As I explain in first post, I'had a EFS backup with a Nandroid Backup. But when I restore with TWRP, the problem was still there. No pin, No baseband etc...
I only delete the EFS folder using root explorer. I reboot, and it was OK. EFS folder was rebuilt automatically.... No more complicated than that...
Click to expand...
Click to collapse
Because the IMEI is not stored in the EFS folder.

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.

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

Messed my phone up :( via the good ol' "baseband unknown" issue

I was doing some rather regular restores from TWRP when all of a sudden I lost my Baseband with no [apparent] way to recover it.
I flashed 4.4 and 5.0 stock ROMs. Nothing. I flashed the modem [CP_N9005XXUGBPB1_MODEM.tar.md5] a zillion times. No luck.
I tried flashing this baby, made by a fellow XDA'er:
http://forum.xda-developers.com/showthread.php?t=2507403
It's based on a script that supposedly fixes this issue. Also no luck. Still stuck on "unknown" baseband, no mobile network
Any help is MUCH appreciated. It's 00:18 and for the past 3 hours I've tried to recover from this...
P.S.: I have a full backup of ALL my partitions, so I think I can recover from this. Somehow...

Can you restore your EFS folder from a backup?

audit13 said:
Can you restore your EFS folder from a backup?
Click to expand...
Click to collapse
Well, I tried to restore the entire OS via TWRP from my full backup. And now, since you mentioned it, I also tried restoring ONLY the EFS. No go

Do you have an actual backed up EFS folder .

JJEgan said:
Do you have an actual backed up EFS folder .
Click to expand...
Click to collapse
I have these files among my TWRP backup files:
efs1.emmc.win 14 MB
efs2.emmc.win 3 MB
efs3.emmc.win 3 MB
I always back up all partitions.
Upon restore, I can see an "efs" folder in the root (along side etc, acct, mnt etc) but the folder is empty.
I have NOT taken any manual backups of the efs folder (as in copy the folder itself), nor did I use a tool such as EFS Professional. I found out about these too late
I was hoping that TWRP does what it says when it "backs up" data. Am I to understand that I just destroyed my phone because TWRP didn't back up my efs?

Sadly thats not an EFS backup .
A shop with a JTag should be able to fix it .

JJEgan said:
Sadly thats not an EFS backup .
A shop with a JTag should be able to fix it .
Click to expand...
Click to collapse
Ouch. Much appreciated, despite the bad news .
I'm quite angry on TWRP now. What did they mean by "efs" backup, if there's no actual backup?
So this means they have to access the phone motherboard to do... what? What should I ask them to do? Flash me a new IMEI?