Hot to flash IMEI/nvram on MTK Phone? - Android Q&A, Help & Troubleshooting

Hello i have a question: Phone with erased IMEI. Going to phone data folder, nothing inside.
Question is:
1) I have the IMEI numbers of the phone
2) Don't have a backup
3) Having an official rom to flash
There is a way to flash the imei information with the ROM flashing?
I know the way with mobileuncle tool click on cdf...radio ecc...i would like to know if there is a way to create something or modify the rom file for inserting the imei information while flashing

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[HELP] 9300+ (mtk6577) PMT corrupted - can't upgrade firmware

Hi.
My 9300+ (chinese mtk6577) is dead... I have to updated wrong firmware and my phone will don't turn ON again, when I use the SP Flash Tool appears the message: "Firmware Upgrade could not be executed without PMT. Please "Download" ONLY first to create PMT on the target!
My internal partition is corrupted and i can't create PMT because my phone don't Turn On, but my USB is recognized by windows.
Please Help Me.
rstalker said:
Hi.
My 9300+ (chinese mtk6577) is dead... I have to updated wrong firmware and my phone will don't turn ON again, when I use the SP Flash Tool appears the message: "Firmware Upgrade could not be executed without PMT. Please "Download" ONLY first to create PMT on the target!
My internal partition is corrupted and i can't create PMT because my phone don't Turn On, but my USB is recognized by windows.
Please Help Me.
Click to expand...
Click to collapse
I know this is an old post, but this may help someone. (would have me a month ago)
Hopefully if your USB is seen in Windows you can convince SP Flash Tool to spew/download/write data to your phone while it's in Meta Mode.
I believe the PMT block is created by SP Flash Tool dynamically from scatter file. It's comparing the scatter file with what is sitting at the PMT address on the flash. If these two mismatch, you get the error you mentioned. If you want to force a new PMT that matches your scatter file's layout, you have to do a "Format" in SP Flash Tool. This will get you back to a PMT on flash that matches your scatter file, then SP Flash Tool will be happy and allow you to use Download (write to flash).
What is a PMT? A partition table that holds the addresses to all the other partitions.
syserr said:
I know this is an old post, but this may help someone. (would have me a month ago)
Hopefully if your USB is seen in Windows you can convince SP Flash Tool to spew/download/write data to your phone while it's in Meta Mode.
I believe the PMT block is created by SP Flash Tool dynamically from scatter file. It's comparing the scatter file with what is sitting at the PMT address on the flash. If these two mismatch, you get the error you mentioned. If you want to force a new PMT that matches your scatter file's layout, you have to do a "Format" in SP Flash Tool. This will get you back to a PMT on flash that matches your scatter file, then SP Flash Tool will be happy and allow you to use Download (write to flash).
What is a PMT? A partition table that holds the addresses to all the other partitions.
Click to expand...
Click to collapse
THANK YOU! :highfive::highfive::highfive::highfive::highfive::highfive:
LOVE YOU MAN
PMT Corrupted & Format-all done
I faced the same error.......my PMT got corrupted (possibly due to an earlier attempt to re-size (system / data) partition using Swiftbootloader)...... & un-fortunately, I clicked on Format in SP Flash Tool as well.
Now all is gone.... phone doesn't switch on.........
Please guide...... to bring the bricked handset (Spice Mi-350n) to life again. I have backups..... but that relate to different scatter file (PMT) perhaps........ do I need to search & learn webos & acmeinstaller kind of things now?
spandrd said:
I faced the same error.......my PMT got corrupted (possibly due to an earlier attempt to re-size (system / data) partition using Swiftbootloader)...... & un-fortunately, I clicked on Format in SP Flash Tool as well.
Now all is gone.... phone doesn't switch on.........
Please guide...... to bring the bricked handset (Spice Mi-350n) to life again. I have backups..... but that relate to different scatter file (PMT) perhaps........ do I need to search & learn webos & acmeinstaller kind of things now?
Click to expand...
Click to collapse
Hi spandrd,
did u manage to resolve this problem. I am also facing this problem after attempting to re-size the partition using meteos mtk6589 rom edit apk .... Although my phone is still working properly without any issue, i am unable to root or install CWM by any means (tried mtk mobileuncle tools, tried spflash tool) but not working. Can you guide me how to root and install cwm as i am unable to revert to my old backup w/o cwm.
spandrd said:
I faced the same error.......my PMT got corrupted (possibly due to an earlier attempt to re-size (system / data) partition using Swiftbootloader)...... & un-fortunately, I clicked on Format in SP Flash Tool as well.
Now all is gone.... phone doesn't switch on.........
Please guide...... to bring the bricked handset (Spice Mi-350n) to life again. I have backups..... but that relate to different scatter file (PMT) perhaps........ do I need to search & learn webos & acmeinstaller kind of things now?
Click to expand...
Click to collapse
HNaseer said:
Hi spandrd,
did u manage to resolve this problem. I am also facing this problem after attempting to re-size the partition using meteos mtk6589 rom edit apk .... Although my phone is still working properly without any issue, i am unable to root or install CWM by any means (tried mtk mobileuncle tools, tried spflash tool) but not working. Can you guide me how to root and install cwm as i am unable to revert to my old backup w/o cwm.
Click to expand...
Click to collapse
The best way to restore your phone was already answered in the previous post, that is to FORMAT your device and subsequently flash the official firmware.
syserr said:
I know this is an old post, but this may help someone. (would have me a month ago)
Hopefully if your USB is seen in Windows you can convince SP Flash Tool to spew/download/write data to your phone while it's in Meta Mode.
I believe the PMT block is created by SP Flash Tool dynamically from scatter file. It's comparing the scatter file with what is sitting at the PMT address on the flash. If these two mismatch, you get the error you mentioned. If you want to force a new PMT that matches your scatter file's layout, you have to do a "Format" in SP Flash Tool. This will get you back to a PMT on flash that matches your scatter file, then SP Flash Tool will be happy and allow you to use Download (write to flash).
What is a PMT? A partition table that holds the addresses to all the other partitions.
Click to expand...
Click to collapse
iZLeeP said:
The best way to restore your phone was already answered in the previous post, that is to FORMAT your device and subsequently flash the official firmware.
Click to expand...
Click to collapse
Hi iZLeeP
Thanks for the quick reply. I dont have any official rom. The only backup i have is using the CWM backup of the official rom before applying a custom LG rom. If it is possible, how can i utilize the CWM backup of the official rom to revert back please ? I can see boot.img and recovery.img files in cwm backup; can i utilize them somehow to revert back ? Please help. Thanks.
HNaseer said:
Hi iZLeeP
Thanks for the quick reply. I dont have any official rom. The only backup i have is using the CWM backup of the official rom before applying a custom LG rom. If it is possible, how can i utilize the CWM backup of the official rom to revert back please ? I can see boot.img and recovery.img files in cwm backup; can i utilize them somehow to revert back ? Please help. Thanks.
Click to expand...
Click to collapse
Let me remind people, the first order of business must be to have a full firmware backup from the phone manufacturer or thru MTK Droid Root & Tools. Reading that you tried to resize your system & data partition, your cwm backup should not be affected by it. Try restoring to default the partition sizes using the app/script you used to resize. It should have that function. Then flash custom recovery and root and see if it works.
phone booting to main-screen or not?
hi HNaseer....
As replied by @syserr & @iZLeeP .............you can try to "Format-All / Format-All except bootloader" type of thing PROVIDED THAT YOU HAVE COMPLETE BACKUP OF RELEVANT PARTITIONS (till Cache and / or till FAT partition length) using SP Flash Tool........ & MTK Droid Tool......... PLUS, YOU WILL NEED IMEI BACKUP (IMEI No.) in such case if you want to restore.
SP Flash Tool needs Scatter File......... (obtainable thru MTK Droid Tool) & can help in backup of various partitions even if phone not turning on. BUT IMEI backup would be good........ IF YOU ARE ABLE TO BOOT / reach main screen after boot animation.
Rest of the details can be first read / understood from my MT6589 chipset type handset link from @Atrvscet : http://forum.xda-developers.com/showthread.php?t=2514419
Or, better search exact thread on xda / elsewhere to get stock / custom rom & flashing etc.
Lastly, if you are able to boot in recovery, best thing should be to flash / force flash original cwm backup from recovery.
HNaseer said:
Hi spandrd,
did u manage to resolve this problem. I am also facing this problem after attempting to re-size the partition using meteos mtk6589 rom edit apk .... Although my phone is still working properly without any issue, i am unable to root or install CWM by any means (tried mtk mobileuncle tools, tried spflash tool) but not working. Can you guide me how to root and install cwm as i am unable to revert to my old backup w/o cwm.
Click to expand...
Click to collapse
spandrd said:
hi HNaseer....
As replied by @syserr & @iZLeeP .............you can try to "Format-All / Format-All except bootloader" type of thing PROVIDED THAT YOU HAVE COMPLETE BACKUP OF RELEVANT PARTITIONS (till Cache and / or till FAT partition length) using SP Flash Tool........ & MTK Droid Tool......... PLUS, YOU WILL NEED IMEI BACKUP (IMEI No.) in such case if you want to restore.
SP Flash Tool needs Scatter File......... (obtainable thru MTK Droid Tool) & can help in backup of various partitions even if phone not turning on. BUT IMEI backup would be good........ IF YOU ARE ABLE TO BOOT / reach main screen after boot animation.
Rest of the details can be first read / understood from my MT6589 chipset type handset link from @Atrvscet : http://forum.xda-developers.com/showthread.php?t=2514419
Or, better search exact thread on xda / elsewhere to get stock / custom rom & flashing etc.
Lastly, if you are able to boot in recovery, best thing should be to flash / force flash original cwm backup from recovery.
Click to expand...
Click to collapse
HNaseer.... I agree with everything spandrd just said. I'd like to stress though, getting a backup of your NVRAM partition is much better than having MTKDT copy your /data/nvram. So if you have a choice, backup the NVRAM partition with SPFT or if MTKDT has that option use it. (I've rarely used MTKDT as I found aspects confusing)
Incredible.
Thank you so much. HAd almost given up hope...
How to connect mtk6582device (spice dream uno) in meta mode
Plz help me out guys ??????
I have a similar issue with my Unite 2 phone. I tried the format option too but I am getting STORAGE_ERROR
[Storage Error] The load and the target are inconsistent!
A Hint message is also there :
The load to be downloaded is for EMMC.
The Target storage is .
Please select a correct load according to the storage.
Please help me in resolving this issue. My phone model is Micromac unite 2 A106 8GB model.
syserr said:
HNaseer.... I agree with everything spandrd just said. I'd like to stress though, getting a backup of your NVRAM partition is much better than having MTKDT copy your /data/nvram. So if you have a choice, backup the NVRAM partition with SPFT or if MTKDT has that option use it. (I've rarely used MTKDT as I found aspects confusing)
Click to expand...
Click to collapse
hello guys
how can i format my device Blu studio energy 2 with sp flash toolmy phone is dead after i do the format and i dont have firmware back up
thank you
---------- Post added at 01:24 AM ---------- Previous post was at 12:26 AM ----------
hello guys
how can i format my device Blu studio energy 2 with sp flash tool my phone is dead after i do the format and i dont have firmware back up
thank you
Omarod said:
hello guys
how can i format my device Blu studio energy 2 with sp flash toolmy phone is dead after i do the format and i dont have firmware back up
thank you
Not sure what you are expecting to do with a FORMAT. If you had a good backup of your NVRAM partition, then what you would need is a SCATTER file and ROM files, you could FORMAT then DOWNLOAD the ROM files and your NVRAM file to your device with SPFT. But since you don't have your NVRAM partition, you don't have an easy path. FYI, I don't know new devices... there could be more complication than MT6577/75.
Click to expand...
Click to collapse
syserr said:
Omarod said:
hello guys
how can i format my device Blu studio energy 2 with sp flash toolmy phone is dead after i do the format and i dont have firmware back up
thank you
Not sure what you are expecting to do with a FORMAT. If you had a good backup of your NVRAM partition, then what you would need is a SCATTER file and ROM files, you could FORMAT then DOWNLOAD the ROM files and your NVRAM file to your device with SPFT. But since you don't have your NVRAM partition, you don't have an easy path. FYI, I don't know new devices... there could be more complication than MT6577/75.
Click to expand...
Click to collapse
Thank you for reply
Where do i find the scatter file and the ROM for my blu studio energy 2 MT6735 chepset please
Thank you again
Click to expand...
Click to collapse
Omarod said:
syserr said:
Thank you for reply
Where do i find the scatter file and the ROM for my blu studio energy 2 MT6735 chepset please
Thank you again
Click to expand...
Click to collapse
Try google, or search xda, or needrom.com...
This may or may not help you. If I were you I would use SPFT right now to try to backup your NVRAM partition if it's not too late. Your FORMAT may have wiped the NVRAM partition already. If it has wiped it, your only good path is to find someone willing to give you their NVRAM partition. Then somehow insert your own IMEI and WIFI MAC in and pray.
Click to expand...
Click to collapse
Could you tell me step by step what can I do coz I'm new in sp flash tool and. Mtk droid root and flash tool
Thank you so much
First find proper ROM on www.needrom.com
Hello Guys
still waiting for help please
Blu Studio Energy 2 -Backup file- firmware Please

Bricked Alcatel Pop C1 4015X (Mediatek MT6572)

Hey all.
Easy question I hope! I've been following the guide to unbrick MTK devices, and have managed to get an original factory ROM to flash to the phone, green tick in SP Flash Tools. However, the phone still won't power on at all, save for the light if plugged into usb.
The ROM I've been using is an original factory rom named "ONE-TOUCH-4015X_POP_C1_FULL_STOCK_BACKUP" which is readily available online. I'm not sure what I did to brick it in the first place, but it was within SP flashtool. I May have formatted accidentally.
If someone coudl help I'll try to provide all logs or files requested but please tell me where these could be found as I'm not that good with flash tool.
To confirm the phone won't boot into any mode, recovery is dead, fastboot is dead....
same problem hope somone help us
also share ur backup please
darkglobe87 said:
Hey all.
Easy question I hope! I've been following the guide to unbrick MTK devices, and have managed to get an original factory ROM to flash to the phone, green tick in SP Flash Tools. However, the phone still won't power on at all, save for the light if plugged into usb.
The ROM I've been using is an original factory rom named "ONE-TOUCH-4015X_POP_C1_FULL_STOCK_BACKUP" which is readily available online. I'm not sure what I did to brick it in the first place, but it was within SP flashtool. I May have formatted accidentally.
If someone coudl help I'll try to provide all logs or files requested but please tell me where these could be found as I'm not that good with flash tool.
To confirm the phone won't boot into any mode, recovery is dead, fastboot is dead....
Click to expand...
Click to collapse
Did you ever get the above rom to work? If so what did you do? Or did you find another method to unbrick the phone? Thanks.
Managed to unbrick my 4015 using Mobile Upgrade S 4.3.0 from the Alcatel Website.
http://www.alcatelonetouch.com/global-en/support/download/one_touch_idolx.html
Very simple to use, just install and follow instructions.
darren1 said:
Managed to unbrick my 4015 using Mobile Upgrade S 4.3.0 from the Alcatel Website.
http://www.alcatelonetouch.com/global-en/support/download/one_touch_idolx.html
Very simple to use, just install and follow instructions.
Click to expand...
Click to collapse
no work this version. yes 4015 but no 4015x
Sorry I should have put my phone is a 4015X not 4015. The application does say 4015 which I selected and all went well.
my 4015x no update, it not load, only work flash mode connected to pc and no work mobile upgrade.
4015X Partitions
the 4015x has a different set of partitions to the older (dual sim) 4015
i have a modded rom (kitkat), a modded stock recovery (as stock is also wrong, wont mount data) and a modded cwmrecovery.
i will be posting these soon
i will create a new post for the 4015x version
and will also be asking for other versions of the 4015 users to post me there partition trees and i will repack some recoverys and some roms for you all
note: there are 6 versions that i have seen and they may all have diff tables
hope these will help the pop c1 community
recoverys and rom
Stock Recovery (Fixed)
https://drive.google.com/file/d/0B4ZKFXlQiHioVUExRW1sZkdzSFk/view?usp=sharing
CWMRecovery (Fixed)
https://drive.google.com/file/d/0B4ZKFXlQiHioUTJqOTMtbUNPTEU/view?usp=sharing
kitkat-cm11-modROM.zip (Fixed)
https://drive.google.com/file/d/0B4ZKFXlQiHioUUI3V2Jsd0lTN1k/view?usp=sharing
(I am currently using this rom my self and all seems to be good except vibration, it also thinks its a dual sim but not causing a probb)
Hello!
This thread is quite old but near my case.
I have an Alcatel Pop C1 4015X (cpu MTK6572M) that can't start at all (only the power LED is ON).
I have a backup of this device made with "SP Flash Tool V5.1532.00" but I've error "not enough space" when
I try to restore it.
Same error when I try to restore just one file.
For example, I've tried to restore only the "Stock Recovery" you give above.
I do this:
- I start Flash_Tool v5.1532.00
- I open scatter file from my backup done with the same tool
- I unselect all pieces of the backup except "Recovery" and I browse to the "Stock Recovery" file I've dl
from this thread.
I've got this error : "not enough storage space (1011)"
What could be the problem ?
I makes me totally crazy !
By advance, thanks for your help.
Regards,
Freeman.
Fr33M4n! said:
Hello!
This thread is quite old but near my case.
I have an Alcatel Pop C1 4015X (cpu MTK6572M) that can't start at all (only the power LED is ON).
I have a backup of this device made with "SP Flash Tool V5.1532.00" but I've error "not enough space" when
I try to restore it.
Same error when I try to restore just one file.
For example, I've tried to restore only the "Stock Recovery" you give above.
I do this:
- I start Flash_Tool v5.1532.00
- I open scatter file from my backup done with the same tool
- I unselect all pieces of the backup except "Recovery" and I browse to the "Stock Recovery" file I've dl
from this thread.
I've got this error : "not enough storage space (1011)"
What could be the problem ?
I makes me totally crazy !
By advance, thanks for your help.
Regards,
Freeman.
Click to expand...
Click to collapse
What i did was i used SPFT to flash a backup i found online. Can't post links, just google "ot 4015X Original SPFT ROM", what i used was the algerian rom. Then i flashed the EE stock rom. My own backup didn't flash back correctly either, that's why i used that one i fould online.
4015X unbricked !
Hello,
I found a similar solution here (replace * with . to get a correct http link):
forum*gsmhosting*com/vbb/f317/ot-4015x-firmware-arabic-bulgaria-africa-kenya-1946694/index2.html
It took me hours to find good stock ROMs (bulgarian & arabian then french via OTU) !
You'll have to "play" with pro_info and scatter file...
Good luck to all to unbrick your 4015x !
Regards,
Freeman.
how to partition system storage space of onetouch pop c1?

huawei y330 u01 flash the rom by sptools but ....imei invalid

hello
As i work for pprojects on my arduino, i decided in the same to flash my huawei y330 u01 for install software like i want and because i found the phone too slow.
the phone was in android 4.2.2 vB123. Now same version after flash failed.:crying:
My phone provider is free mobile
i took the rom made in a french forum and use sp flash tools. Like a newbie, i don't save my phone because where are no data so i don't read all documentations and i check the all options on sp flash so i erase my imie if i understand by erasing the nvram
i try different way to reinstall my imie but all failed. i have a official rom that i tried to flash with 2 computers in w10 or 7 but it's a update.app file and ctw don't take it. i try to unpack this file with a post take here. i also try :
imei repair,ingeneer mode,maei meta ,mobileuncul,mtktools,spflash tools in differents versions 3.x or 5.x ,sn write, nvram fix
so i have few questions :
if i flash the phone with the official rom, can this repair the imie ? In that case, how can i restore with the update.app file is it possible to install the official recovery 3e ?
someone have a backup for an original phone just put the imie to null that i can install?
thanks for everything to try
CR
need the file mddb for my restore
Hi with out being out of law, can somebody send me the file BPLGUIinfoCustomAPPxxxxxx from system /etc/mddb
it's the file if i understand which the modem description. my phone is a y330 u01
chip mt6572 e01
software version moly
hardware (huawei 72 we jb3 hspa hw)
thanks
cr
Uncheck Preloader while other files checked and click on download then connect ur huawei and it should write VCOM XX(where XX represents a random port) in spflash tool.
Official roms are obtainable from huawei sites and there exist different versions but all look same to me ; u may also used a U05 variant on your U01 .

SoftBricked Tablets cube t8 plus

Hello all,
I'm so dessapointed, i brick my tablet when i want resize but i cant flash with the official firmware (official site " 51cube.com" and "cube-tablet" if you can help me ='(.
Perhaps the firmware is wrong or my manip is wrong, i don't know.
Thx for you help.
Ps : I'm french =)
nofansub said:
Hello all,
I'm so dessapointed, i brick my tablet when i want resize but i cant flash with the official firmware (official site " 51cube.com" and "cube-tablet" if you can help me ='(.
Perhaps the firmware is wrong or my manip is wrong, i don't know.
Thx for you help.
Ps : I'm french =)
Click to expand...
Click to collapse
Hello,
My tablets is good, i flash with the firmware on the site :
h**p://chinagadgetsreviews.com
the link for help.
h**p://chinagadgetsreviews.blogspot.ro/2015/12/download-latest-android-lollipop-51_0.html
Bye
How to?
nofansub said:
Hello,
My tablets is good, i flash with the firmware on the site :
h**p://chinagadgetsreviews.com
the link for help.
h**p://chinagadgetsreviews.blogspot.ro/2015/12/download-latest-android-lollipop-51_0.html
Bye
Click to expand...
Click to collapse
Please can you explain how to use that firmware?
I think it's a recovery firmware for going back to factory defaults when s**t happens.
But I read on some forums that I should backup my IMEI and NVRAM (with MTKDroidTools or something like that...i don't know if there's a specific tool for the Cube T8 Plus) BEFORE trying custom roms, otherwise there will be problems even on restoring stock firmware, right?
Can somebody please make a short-how-to for dummies focalized on this Cube T8 Plus (so poor and confused support on forums yet)?
- Backup before custom rom installation
- Custom rom installation
- Recover to stock firmware
Another question: why that page you linked says "Platform: Mediatek MT6753"
Isn't MT8783?
Thank you very much
my tablet is not bricked now but my serial number and my mac adress is wrong ='(
Use sp tool for save your firmware tablet ( i think).
I have the same problem, after the resizing of partition the tablet is soft bricked and I'm downloading the stock firmware form the above link.
Is there any way to backup the mac address and serial number from softbricked tablet?
...you should have a backup of nvram!
Morgan766 said:
I have the same problem, after the resizing of partition the tablet is soft bricked and I'm downloading the stock firmware form the above link.
Is there any way to backup the mac address and serial number from softbricked tablet?
Click to expand...
Click to collapse
I think it's too late.
I did a backup of nvram with SP Flash Tools BEFORE brick.
When i recovered the tablet after brick, my IMEI was invalid until i flashed my backup of nvram.
Anyone could suggest how and what to backup before trying Root and Resize?
Just backup nvram with sp flash tool
bolija said:
Anyone could suggest how and what to backup before trying Root and Resize?
Click to expand...
Click to collapse
The only unrecoverable partition (for mediatek devices like T8 Plus) is the nvram which contains info about IMEI.
Firmwares/ROMS that we can download from the web never comes with nvram because it's single product related. It's like mac address of wifi cards.
You can find even stock (original) firmwares online, they will bring your tablet back to factory default after a brick.
But if the brick corrupted the nvram, you will NEVER be able to recover it. That means no phone calls and no data connection.
Unless you did a backup of nvram before its corruption.
With SP flash tool you can "read back" from your T8 plus the nvram partition and save it as a file on your pc (file size must be 5MB). Of course you need drivers, SP flash tool and the scatter file. Since i wasn't able to retrieve the scatter file from my T8 plus, I used the scatter included in the stock firmware T8-PLUS_V1.0_20151004.
I am new forum user so I can't post links, but google is enough.
That stock firmware is hosted by baidu, so use browser translation and register an account to get permissions for download.
Remember: in the firmware archive you only need the scatter file! It will tell to SP flash tool where the nvram partition starts and where it ends.
If you will need to restore nvram (e.g. after the unbrick) ,you will have to download to your T8 plus that nvram file with SP flash tool, but before you have to edit the scatter file and set "is_download=true" in the nvram section. Otherwise you will not be able to select nvram in the partitions list from the download tab of SP flash tool.
So the backup will consist in two files:
- nvram file (5MB) (nvram, nvram.img, nvram.bin, extension doesn't matter)
- scatter file with edited "is_download=true" for nvram section
Thanks so much for your help. I think i will be able to backup NVRAM. But im kind of lost on scatter file editing and flash.
Im waiting for Tablet ti arrive

[GUIDE] FIX N950F efs failed to mount and dm-verify fail (unbrick)

The following is a guide for repairing failed to mount efs and dm-verify fail (drk error)
We finally did it ~~~
Warning - We will not take any responsibility for your device. Follow the steps at your own risk. If your device is Knox 0, This guide would convert it into Knox 1 due to TWRP. For solutions that does not convert to knox 1 check out payed remote solutions. Everything on your device will be reset, including efs partition. You will need backup of efs.
Test on N950F binary 4 may work on other exynos models comment below if it worked for other samsung devices.
Problem Detail -
Bootloop with samsung stock firmware boot logo.
Recovery error E:Failed to mount /efs (Invalid argument) or dm-verity verification failed...
Device cannot boot into Factory binary or Stock Rom​
Actions that could cause this problem -
Flashing a non-signed efs.img by odin
Corrupt flash of efs partition.​
Note - Must have efs backup for device to work (very important)
Any error that cause bootloop would show in recovery required if
Files Required
Latest Odin (recommend 3.13)
Working Stock firmware and Combination file (same binary as bootloader)
PC
Winrar or 7zip etc
Solution for efs failed bootloop-
Extract Stock firmware AP file (rename .md5 to .tar)
Rename dqmdbg.img to efs.img (or smallest image must be smaller than 8000 KB). Extract Dqmdbg.img.lz4 so it’s just “Dqmdbg.img” and then rename it to efs.img and put that one in a tar. Other option is downloading a file that’s already made this way if your bootloader is binary 4, Saves you trouble of extracting / renaming: http://www.mediafire.com/file/589wucja9rk2v8f/efs.tar/file (if you download this file just move onto number 3)
Add file new efs.img into tar archive.
Flash tar as AP file in odin + download mode
Reboot download mode
Flash Combination with odin + nand erase option on Edit: suggest you to flash stock rom first and oem unlock, don't need to wait for 7 days if imei is 0000 skip combination step
Device Should boot into Factory binary
Use IME to restore imei using *#06# (or imei 0000 in stock rom) Edit: This step is not required if efs backup is restored successful
Your device should have dm-verify failed in recovery due to drk error
Continue drk bypass for dm verify error below to continue
Solution for dm-verify error (also known as drk bypass - but temporary read note)-
Extract Stock firmware AP file
Make a copy of boot.img and delete recovery.img
Note - if files is boot.img.lz4 format change name to recovery.img.lz4
Rename boot.img copy to recovery.img
Add all the files (including other files extracted) to tar.
Flash Modded AP file with BL, CP, CSC (nand erase not required)
The phone will boot into stock firmware
Note- cannot reboot, will stuck at dm-verify error again and need to flash modded AP again.
Wait 7 days to oem unlock phone or use 7 day bypass by changing dates (not always work, keep trying, don’t reboot, worked for Samsunguser932 Edit: Imei must be 0000)
Edit: oem unlock will fix drk - if not you must follow next step
Once oem unlock flash TWRP and restore efs backup Edit: if you haven't fixed imei fix now by *#06# with combination file
Flash stock firmware once again by odin (stock, not modded)
Done - phone is back to normal
If you cannot be bothered doing by yourself you can pay https://www.facebook.com/gsm.xraxxx/ to do this.
(after he used plexihub to fix phone, i believe he is using similar method. It doesn’t seem fair to post this guide as i’ll be damaging his income but it seemed also unfair to keep this as a secret. If you want to donate to me please donate to him and his team instead at https://spacial-file.com/ or paypal [email protected] Thx)
Special Thanks to -
Samsunguser932 - testing this guide you can see his post on https://forum.xda-developers.com/galaxy-note-8/help/note-8-phone-booting-efs-restore-t3830209
Ravi Kumar - for his help in giving me clues how to fix.
Resources: (where i got most my info)
https://forum.xda-developers.com/galaxy-note-8/help/unbrick-methods-t3703767
https://forum.xda-developers.com/galaxy-note-8/help/to-fix-efs-secondary-note-8-t3785600
https://forum.xda-developers.com/galaxy-note-8/help/note-8-phone-booting-efs-restore-t3830209
http://forum.gsmhosting.com/vbb/f453/samsung-s8-g955f-2426383/​
Comment below for help.
Give me a thanks if you find this guide very/extremely helpful. :angel:
Share it with those in need.
edit: not all images were able to upload
update: to skip 7 day oem unlock imei must be 0000
The best method for bypassing oem unlock for 7 days.
Requirements - clean phone with stock firmware, samsung account logged in, imei 0000
Go to setting and check for manual update. This will fail/stuck and oem unlock would appear in development settings
Reserved
hello , i have samsung j737t with bad efs ,
Recovery error E:Failed to mount /efs (Invalid argument)
any help please ,i have cert in hand
maxpatri9 said:
hello , i have samsung j737t with bad efs ,
Recovery error E:Failed to mount /efs (Invalid argument)
any help please ,i have cert in hand
Click to expand...
Click to collapse
Try the above guide. This guide isn't just designed for the note 8.
from what file i need to create efs.img for s8+ g955F?
ditternation said:
from what file i need to create efs.img for s8+ g955F?
Click to expand...
Click to collapse
You do not need an efs.img to repair efs failed to mount. It is only required for the functionality of the phone (sim). This guide would work without an efs.img, it is recommended to install a custom rom after the guide. Even though this guide can allow you phone to work, but due to drk/dm-verify errors, it is currently impossible to restore the phone to the original state.
Note - you'll need to find someone that is kind enough to share a copy/backup of their efs.img g955F. Most people think it is illegal to share as the efs.img contain imei, but with cpid devices, the imei would be overridden by your current device. Most importantly you need to change the serial number in the SVC (or else you will have the same serial number as the person sharing.
plz my problem is oem lock on, frp on and drk error. i have combination file and stock can your guide work for me?
soundn said:
plz my problem is oem lock on, frp on and drk error. i have combination file and stock can your guide work for me?
Click to expand...
Click to collapse
This would only work if you're still on binary 3. Follow the steps for DM verity fix with 7.1.1 firmware. Flash stock 7.1.1 with replaced boot.img using Odin and fix frp using adb (guides online to enable adb). Wait for 7 day OEM unlock (no method to skip do not restart). Flash twrp and use twrp to flash custom ROM or DM verify fix.
Note - this method would fix function ability of the phone only if efs is not corrupted. (If you had paid someone to fix efs, this would not work). Finally the phone will become Knox 1 and normal update functions might not work. Practically makes the phone unable to resell as a working phone.
Hello. My efs partition was erased by a z3x box. Or an octopus, I do not know. I followed your instructions. The IME combination is empty. I install a modified firmware, it works but I can not enter the Samsung account (crashing), I can not check the system updates (infinite device registration). Should I wait 7 days before the OEM unlock? Will it work?
@Alarg read post 2 to skip 7 days. Infinite device registration should make OEM unlock show with samsung account logged in. OEM unlock must be first done before installing modified firmware (suggest kernel). You must have backup of efs, a backup from another phone will not work.
bluecub1st said:
@Alarg read post 2 to skip 7 days. Infinite device registration should make OEM unlock show with samsung account logged in.
Click to expand...
Click to collapse
I can't log in Samsung account (processing failure). Imei unknown, s/n 0000000000 This method does not work for me.
@Alarg Which firmware ver are you using?
Have you tried nand flash combination file and then flash firmware (before boot, hold download mode buttons so the phone won't boot to factory mode). I do not see a reason why Samsung account would not work, try another ver maybe the version you downloaded is corrupted.
bluecub1st said:
The following is a guide for repairing failed to mount efs and dm-verify fail (drk error)
We finally did it ~~~
Warning - We will not take any responsibility for your device. Follow the steps at your own risk. If your device is Knox 0, This guide would convert it into Knox 1 due to TWRP. For solutions that does not convert to knox 1 check out payed remote solutions. Everything on your device will be reset, including efs partition. You will need backup of efs.
Test on N950F binary 4 may work on other exynos models comment below if it worked for other samsung devices.
Problem Detail -
Bootloop with samsung stock firmware boot logo.
Recovery error E:Failed to mount /efs (Invalid argument) or dm-verity verification failed...
Device cannot boot into Factory binary or Stock Rom​
Actions that could cause this problem -
Flashing a non-signed efs.img by odin
Corrupt flash of efs partition.​
Note - Must have efs backup for device to work (very important)
Any error that cause bootloop would show in recovery required if
Files Required
Latest Odin (recommend 3.13)
Working Stock firmware and Combination file (same binary as bootloader)
PC
Winrar or 7zip etc
Solution for efs failed bootloop-
Extract Stock firmware AP file (rename .md5 to .tar)
Rename dqmdbg.img to efs.img (or smallest image must be smaller than 8000 KB). Extract Dqmdbg.img.lz4 so it’s just “Dqmdbg.img” and then rename it to efs.img and put that one in a tar. Other option is downloading a file that’s already made this way if your bootloader is binary 4, Saves you trouble of extracting / renaming: http://www.mediafire.com/file/589wucja9rk2v8f/efs.tar/file (if you download this file just move onto number 3)
Add file new efs.img into tar archive.
Flash tar as AP file in odin + download mode
Reboot download mode
Flash Combination with odin + nand erase option on Edit: suggest you to flash stock rom first and oem unlock, don't need to wait for 7 days if imei is 0000 skip combination step
Device Should boot into Factory binary
Use IME to restore imei using *#06# (or imei 0000 in stock rom) Edit: This step is not required if efs backup is restored successful
Your device should have dm-verify failed in recovery due to drk error
Continue drk bypass for dm verify error below to continue
Solution for dm-verify error (also known as drk bypass - but temporary read note)-
Extract Stock firmware AP file
Make a copy of boot.img and delete recovery.img
Note - if files is boot.img.lz4 format change name to recovery.img.lz4
Rename boot.img copy to recovery.img
Add all the files (including other files extracted) to tar.
Flash Modded AP file with BL, CP, CSC (nand erase not required)
The phone will boot into stock firmware
Note- cannot reboot, will stuck at dm-verify error again and need to flash modded AP again.
Wait 7 days to oem unlock phone or use 7 day bypass by changing dates (not always work, keep trying, don’t reboot, worked for Samsunguser932 Edit: Imei must be 0000)
Once oem unlock flash TWRP and restore efs backup Edit: if you haven't fixed imei fix now by *#06# with combination file
Flash stock firmware once again by odin (stock, not modded)
Done - phone is back to normal
If you cannot be bothered doing by yourself you can pay https://www.facebook.com/gsm.xraxxx/ to do this.
(after he used plexihub to fix phone, i believe he is using similar method. It doesn’t seem fair to post this guide as i’ll be damaging his income but it seemed also unfair to keep this as a secret. If you want to donate to me please donate to him and his team instead at https://spacial-file.com/ or paypal [email protected] Thx)
Special Thanks to -
Samsunguser932 - testing this guide you can see his post on https://forum.xda-developers.com/galaxy-note-8/help/note-8-phone-booting-efs-restore-t3830209
Ravi Kumar - for his help in giving me clues how to fix.
Resources: (where i got most my info)
https://forum.xda-developers.com/galaxy-note-8/help/unbrick-methods-t3703767
https://forum.xda-developers.com/galaxy-note-8/help/to-fix-efs-secondary-note-8-t3785600
https://forum.xda-developers.com/galaxy-note-8/help/note-8-phone-booting-efs-restore-t3830209
http://forum.gsmhosting.com/vbb/f453/samsung-s8-g955f-2426383/​
Comment below for help.
Give me a thanks if you find this guide very/extremely helpful. :angel:
Share it with those in need.
edit: not all images were able to upload
update: to skip 7 day oem unlock imei must be 0000
Click to expand...
Click to collapse
thanx! for your guide but i have this problem after taking an official OTA!
DM-Verity ERRor!
any help will be greatly appreciated!
Can someone explain me what is this EFS ?? I'm flashing roms many many times and I hadn't such problems etc
klisza1993 said:
Can someone explain me what is this EFS ?? I'm flashing roms many many times and I hadn't such problems etc
Click to expand...
Click to collapse
Just Google "EFS android"
pixel989 said:
thanx! for your guide but i have this problem after taking an official OTA!
DM-Verity ERRor!
any help will be greatly appreciated!
Click to expand...
Click to collapse
Follow
Solution for dm-verify error (also known as drk bypass - but temporary read note)-
Extract Stock firmware AP file
Make a copy of boot.img and delete recovery.img
Note - if files is boot.img.lz4 format change name to recovery.img.lz4
Rename boot.img copy to recovery.img
Add all the files (including other files extracted) to tar.
Flash Modded AP file with BL, CP, CSC (nand erase not required)
The phone will boot into stock firmware
Note- cannot reboot, will stuck at dm-verify error again and need to flash modded AP again.
Wait 7 days to oem unlock phone or use 7 day bypass by changing dates (not always work, keep trying, don’t reboot, worked for Samsunguser932 Edit: Imei must be 0000)
Once oem unlock flash TWRP and restore efs backup Edit: if you haven't fixed imei fix now by *#06# with combination file
Flash stock firmware once again by odin (stock, not modded)
Done - phone is back to normal
Click to expand...
Click to collapse
Note -
dm verify cannot be completely fixed, it can only be bypassed (in the system by flashing no dm verify).
You will need to wait for 7 days for oem unlock (there is no method to skip oem unlock)
Warranty will be voided (KNOX 1) - don't think there is a method to avoid tripping knox.
Suggest installing a custom rom after oem unlock (many reports that no dm verify on latest oreo does not work without root)
klisza1993 said:
Can someone explain me what is this EFS ?? I'm flashing roms many many times and I hadn't such problems etc
Click to expand...
Click to collapse
EFS partition is not touched when flashing roms (they actually do but in a safe way), only retards like I would try to mod efs partition.
Hi guys, will it work in my case? https://ibb.co/mJRcHK
Device is SM-N950N FRP ON and OEM ON.
What kind of solution should I follow?
@Anvar2005 - This looks like a drk verify error. Which binary are you on? frp bypass only works with binary 3. You will not find anything for frp unlock on this forum. Same steps for drk verify but use nougat.

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