Hello, a friend had IMEI 0 and restored the efs and persist backup from another device and now he can't restore his IMEI, even after flashing lastest pie stock.
Any ideas?
Congratulations!! Flashing another persist and efs backup is the safest way to loose your IMEI.
If there's no backup of it's own (and I guess there isn't) he won't be able to restore his IMEI.
The /persist partition holds a little binary which is unique for each device. It's impossible to recreate it.
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Dear Dr.Ketan
since I have recently registered I am unable to post anything on the development thread. I am facing a serious problem. and I am asking you this because I had backed up efs.img 20 Mb and it has helped me restore earlier. but now it's failing to restore my efs. I am explaining the problem below.
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.
1. could you tell me if it's possible to extract the efs.img to the efs files and will it help.
2. do you think there is a way I could retore from your tool using some other method.
i have tried the following things too
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 if you 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
Is the efs swappable between devices? Say my friend back ups his efs. can i then restore his backup if we both have the vs980?
No, efs is unique to each device.
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.
Hello everyone.
Got stock 910C with 5.0.1, today made root and twrp. backed up EFS with terminal emulator (got efs.img) on my sdcard.
Also made EFS backup with twrp.
Flashed custom 5.0.1 rom, right on welcome screen - lots of FCs. Wipes didnt help.
Returned back to backup of stock rom but now EFS got erased. no IMEI and cellular network.
Tried restoring with terminal and twrp - no luck
Can someone advise?
Try to make a software repair with Kies and report back
Dont forget, EFS doesnt contain any IMEI certs or CAL data, so if u clear EFS partition IMEI willl be the same, only SerialNumber will be wiped
exprxp said:
Dont forget, EFS doesnt contain any IMEI certs or CAL data, so if u clear EFS partition IMEI willl be the same, only SerialNumber will be wiped
Click to expand...
Click to collapse
can u clarify please. how can be serial number be wiped?
EFS partition -> SerialNo, Bluetooth, WiFi and password + settings
IMEI certs -> SIM LOCK, Imei number. CAL data
As u can see EFS erasing will never destroy imei number
exprxp said:
EFS partition -> SerialNo, Bluetooth, WiFi and password + settings
IMEI certs -> SIM LOCK, Imei number. CAL data
As u can see EFS erasing will never destroy imei number
Click to expand...
Click to collapse
then why did i lose baseband?
When you tried to backup EFS or root you lost MD5 signature of IMEI parititon. Now its gone. In some cases it can be undone by flashing to STOCK firmware.
Please check the screenshot for correct location of EFS partition and M9K partitions
i did restore my EFS by reinstalling stock 5.0.1 with odin.
I updated my SM-G900A to the latest Marshmallow 6.0.1 using ODIN. Afterwards I can't make calls and I have no bars on the top. I may have chosen the wrong settings in ODIN 3.12.3. If my EFS data has been lost can I restore from the EFS partition? I don't think I chose the EFS clear option. I unable to root on this phone right? I am new to smartphones so I'm not sure what to do. Are there methods of restoring the EFS data from the EFS partition if it is still there without rooting the phone? I do have firmware for Lollipop 5.1.1 if that helps.
you cannot recover efs without a backup previous made
remosam said:
you cannot recover efs without a backup previous made
Click to expand...
Click to collapse
So if I used the default settings on ODIN and upgraded to Marshmallow the EFS partition would not be there anymore? What if the EFS data gets corrupted. Is there is no way to restore? I'm just assuming it is the EFS data and not something else. I read the EFS partition cannot be accessed without rooting the phone?