Can you fix EFS Partition?

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Juwapa

Member
Oct 9, 2016
47
12
Dallas, Texas
Hey all, I did a bad thing. Please help.

Just wanna start off by saying I'm really stupid and things like this make me not want to modify my device anymore. I recently updated to 10.3.0, and after flashing something in the wrong order, I soft bricked my OP6. Since I wanted to basically start over with Android 10, I decided to just do a full wipe, without reading how to. I wiped all partitions through TWRP (Which I very quickly learned is a stupid thing to do) because that it how I went about installing new ROMs on my old phone. That left me with just the bootloader on my phone and nothing more. So I used fastboot to flash recovery and 10.3.0 and everything was fine, or at least I thought.

Everything has been fine for about a week now, until my phone randomly restarted. Upon reboot, my sim card wasn't reading and whenever I tried going to it's settings, it would say "com.android.phone keeps stopping" and after a bunch of searching around... I learned what an EFS Partition is and I'm pretty sure that bad boy is gone. Putting *#06# in the keypad gives me a MEID number, but no IMEI number.

So my question now is, is there anything I can do? I found a few posts that say you could try flashing ColorOS (but there is only an unofficial port for OP6), one comment I found said to use a program called EFS Professional and flash back to stock, and some others suggested MSM tool? Which I haven't used, so I have no clue what that's about. Does anyone have experience or a suggestion for me, please? Any help is greatly appreciated.

My phone is also completely working right now, apart from sim card use. The sim was also 100% working for about a week, before it randomly rebooted, is that normal? I just want to get my phone back to working order, I'm done with modifying. I feel stupid and defeated lmao, oh man, pls help.
 
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Mr.FREE_Bird

Senior Member
Nov 5, 2013
575
522
Hey all, I did a bad thing. Please help.

Just wanna start off by saying I'm really stupid and things like this make me not want to modify my device anymore. I recently updated to 10.3.0, and after flashing something in the wrong order, I soft bricked my OP6. Since I wanted to basically start over with Android 10, I decided to just do a full wipe, without reading how to. I wiped all partitions through TWRP (Which I very quickly learned is a stupid thing to do) because that it how I went about installing new ROMs on my old phone. That left me with just the bootloader on my phone and nothing more. So I used fastboot to flash recovery and 10.3.0 and everything was fine, or at least I thought.

Everything has been fine for about a week now, until my phone randomly restarted. Upon reboot, my sim card wasn't reading and whenever I tried going to it's settings, it would say "com.android.phone keeps stopping" and after a bunch of searching around... I learned what an EFS Partition is and I'm pretty sure that bad boy is gone. Putting *#06# in the keypad gives me a MEID number, but no IMEI number.

So my question now is, is there anything I can do? I found a few posts that say you could try flashing ColorOS (but there is only an unofficial port for OP6), one comment I found said to use a program called EFS Professional and flash back to stock, and some others suggested MSM tool? Which I haven't used, so I have no clue what that's about. Does anyone have experience or a suggestion for me, please? Any help is greatly appreciated.

My phone is also completely working right now, apart from sim card use. The sim was also 100% working for about a week, before it randomly rebooted, is that normal? I just want to get my phone back to working order, I'm done with modifying. I feel stupid and defeated lmao, oh man, pls help.

Alright calm down, yes what you have done isn't smart to do but nothing is gonna change that, we can't go back in time.
First of I would start with restoring your device by using the the MSM Download Tool which you can find here --> https://forum.xda-developers.com/oneplus-6/how-to/tool-msmdownloadtool-v4-0-international-t3798892
All you need to know is described in the thread, read it carefully before attempting to restore your device. It will re-lock the bootloader, wipe the internal storage and restore all the partitions on your device. Make sure you made a backup of all your important files which might be stored on your device. If those instructions are still not clear enough you could watch this video which shows how to restore your device, here is a link to that video --> https://www.youtube.com/watch?v=jtc7EhNsfPA&feature=youtu.be
After restoring your device you should check if your device shows it's IMEI number again, if not I can't help you further. I've never used the EFS Professional tool with the OP6. So attempting to restore the IMEI with that tool is on your own risk.
I hope you learn from this experience, you should always make backups of the important partitions of your device before even thinking about modifying the system on your device in any way. This won't change your current situation by saying this but it will be helpful in the future.
Good luck!
 
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Juwapa

Member
Oct 9, 2016
47
12
Dallas, Texas
Alright calm down, yes what you have done isn't smart to do but nothing is gonna change that, we can't go back in time.
First of I would start with restoring your device by using the the MSM Download Tool which you can find here --> https://forum.xda-developers.com/oneplus-6/how-to/tool-msmdownloadtool-v4-0-international-t3798892
All you need to know is described in the thread, read it carefully before attempting to restore your device. It will re-lock the bootloader, wipe the internal storage and restore all the partitions on your device. Make sure you made a backup of all your important files which might be stored on your device. If those instructions are still not clear enough you could watch this video which shows how to restore your device, here is a link to that video -->
&feature=youtu.be
After restoring your device you should check if your device shows it's IMEI number again, if not I can't help you further. I've never used the EFS Professional tool with the OP6. So attempting to restore the IMEI with that tool is on your own risk.
I hope you learn from this experience, you should always make backups of the important partitions of your device before even thinking about modifying the system on your device in any way. This won't change your current situation by saying this but it will be helpful in the future.
Good luck!

Hi, thank you so much for the quick reply. So apparently it was just a problem with xXx NoLimits, I think? I tried uninstalling it right after making the original post and now my sim is working like normal. I'm confused because I don't think I had any settings with NoLimits that should of affected the sim or even storage of my phone. So why would it work fine for a week and just randomly decide to kill itself like that? As you can see in the screenshots, my IMEI was missing and is now back.

But I'm still worried about when I had wiped all partitions, is there something funky going on with the partitions/storage of my device? Is the "EFS Partition" the only partition that can be permanently lost? If I can still make a backup of it, I should definitely do that, and is there anything else I specifically should make sure I have backed up?
 

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Mr.FREE_Bird

Senior Member
Nov 5, 2013
575
522
Hi, thank you so much for the quick reply. So apparently it was just a problem with xXx NoLimits, I think? I tried uninstalling it right after making the original post and now my sim is working like normal. I'm confused because I don't think I had any settings with NoLimits that should of affected the sim or even storage of my phone. So why would it work fine for a week and just randomly decide to kill itself like that? As you can see in the screenshots, my IMEI was missing and is now back.

But I'm still worried about when I had wiped all partitions, is there something funky going on with the partitions/storage of my device? Is the "EFS Partition" the only partition that can be permanently lost? If I can still make a backup of it, I should definitely do that, and is there anything else I specifically should make sure I have backed up?

No problem!
Strange, sounds like something you configured in your xXx NoLimits config caused some trouble. Maybe you debloated an app that causes this behavior? It would be a guessing game for me.
If I was you I would restore the device using the MSM Download Tool to start clean again. After that I would make a full system backup using TWRP. So in case you do lose the EFS partition or something else you will have something to fall back on.
The EFS partition can indeed be lost but you would really need to badly mess with the system on your device. I've only once experienced a lost IMEI number after a system update on my LG G4 but I could restore it using the EFS Professional tool. The actual EFS partition was still there I think but got corrupted somehow. Luckily I had made a backup of that partition with TWRP but I still needed to write the IMEI number to it manually. You should just always make backups before attempting to modify the system on your device. Lesson learned right? ;)
 
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Juwapa

Member
Oct 9, 2016
47
12
Dallas, Texas
No problem!
Strange, sounds like something you configured in your xXx NoLimits config caused some trouble. Maybe you debloated an app that causes this behavior? It would be a guessing game for me.
If I was you I would restore the device using the MSM Download Tool to start clean again. After that I would make a full system backup using TWRP. So in case you do lose the EFS partition or something else you will have something to fall back on.
The EFS partition can indeed be lost but you would really need to badly mess with the system on your device. I've only once experienced a lost IMEI number after a system update on my LG G4 but I could restore it using the EFS Professional tool. The actual EFS partition was still there I think but got corrupted somehow. Luckily I had made a backup of that partition with TWRP but I still needed to write the IMEI number to it manually. You should just always make backups before attempting to modify the system on your device. Lesson learned right? ;)

Thank you so much for this info. May I ask what the best way to actually backup the EFS Partition would be? After a quick google search, a few different apps popped up. But based on your reply, I'm assuming you've done this before, so is there a certain method you would suggest for a noob like myself?

And as far as using the MSM Tool for a complete reset/backup, do you think that would really be necessary? From what I've read, newer versions of TWRP don't even let you delete/backup the EFS Partition, which means it would be unlikely that I even actually touched that partition, right? And my experience was most likely caused by some xXx NoLimits setting then, I'd assume. I think what messed me up when I first upgraded to 10.3.0, was that I accidentally wiped the Vender partition (which I believe is what the recovery is now on?) Which is why I had to flash via fastboot. But still, I would like to backup the EFS Partition just to be assured I won't have this come up in the future. But outside of the EFS Partition, isn't it pretty easy to fix any Partition/Bricks that might occur on the OnePlus 6?

And again, thank you so much for taking the time to respond to a silly goose like me. I've made it this far without damaging ant of my phones but I think it's about time I stop playing with fire and actually read/backup important stuff haha.
 

Mr.FREE_Bird

Senior Member
Nov 5, 2013
575
522
Thank you so much for this info. May I ask what the best way to actually backup the EFS Partition would be? After a quick google search, a few different apps popped up. But based on your reply, I'm assuming you've done this before, so is there a certain method you would suggest for a noob like myself?

And as far as using the MSM Tool for a complete reset/backup, do you think that would really be necessary? From what I've read, newer versions of TWRP don't even let you delete/backup the EFS Partition, which means it would be unlikely that I even actually touched that partition, right? And my experience was most likely caused by some xXx NoLimits setting then, I'd assume. I think what messed me up when I first upgraded to 10.3.0, was that I accidentally wiped the Vender partition (which I believe is what the recovery is now on?) Which is why I had to flash via fastboot. But still, I would like to backup the EFS Partition just to be assured I won't have this come up in the future. But outside of the EFS Partition, isn't it pretty easy to fix any Partition/Bricks that might occur on the OnePlus 6?

And again, thank you so much for taking the time to respond to a silly goose like me. I've made it this far without damaging ant of my phones but I think it's about time I stop playing with fire and actually read/backup important stuff haha.

I have always used TWRP for making a backup of the EFS Partition, the option to do so is still available in the backup section in TWRP. It is indeed very unlikely you ever touched that partition but as you experienced it isn't hard to mess up the installation of your system so you should definitely back it up just to be sure you could restore it if something goes wrong. If I'm not mistaken the recovery is actually written to the boot partition and not the vendor partition or that has changed since Android 10. But I don't see any reason to ever wipe the vendor partition. You should always carefully read instructions before installing any kind of software so you are sure you are doing it right. And yes, fixing soft bricks on the OP6 isn't hard to do when you know what you are doing. Doing research is very important, by doing so you know what you are doing, how you should do it and you will have a higher chance to fix errors in case things don't turn out to work as they should. Luckily things didn't go very wrong for you but I hope you'll spend some time doing research before you are going to modify the system on your device. It will prevent a lot of trouble. But by making mistakes you will learn to right. ;) Oh and I almost forgot to mention that you should copy your backups to an other device or storage in case your internal storage gets wiped.
It's not a problem to give a helping hand, that's what this place is for. I'm always glad to help those who kindly ask for help. :good:
 
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Juwapa

Member
Oct 9, 2016
47
12
Dallas, Texas
I have always used TWRP for making a backup of the EFS Partition, the option to do so is still available in the backup section in TWRP. It is indeed very unlikely you ever touched that partition but as you experienced it isn't hard to mess up the installation of your system so you should definitely back it up just to be sure you could restore it if something goes wrong. If I'm not mistaken the recovery is actually written to the boot partition and not the vendor partition or that has changed since Android 10. But I don't see any reason to ever wipe the vendor partition. You should always carefully read instructions before installing any kind of software so you are sure you are doing it right. And yes, fixing soft bricks on the OP6 isn't hard to do when you know what you are doing. Doing research is very important, by doing so you know what you are doing, how you should do it and you will have a higher chance to fix errors in case things don't turn out to work as they should. Luckily things didn't go very wrong for you but I hope you'll spend some time doing research before you are going to modify the system on your device. It will prevent a lot of trouble. But by making mistakes you will learn to right. ;) Oh and I almost forgot to mention that you should copy your backups to an other device or storage in case your internal storage gets wiped.
It's not a problem to give a helping hand, that's what this place is for. I'm always glad to help those who kindly ask for help. :good:

So I finally had time to sit down and make backups of my device. I made a backup of just the EFS and Modem Partition only and I made another complete backup of everything. This should be all I need right?

And yes, I will keep the backups on my PC and on the flash drive I keep my current rom, recovery, kernel, and magisk on.
 

Juwapa

Member
Oct 9, 2016
47
12
Dallas, Texas
Nolimit and random reboot in android 10.0.3? Turn off kernel tweaks in Nolimit profiles, and then flash Nolimit. It will be fine.

I could be wrong, but I don't think I had KernelTweaks on to begin with. I keep reading people are having problems with it, so I think I'll just stop using it. And it wasn't reboots that were the problem, I only had the one reboot. The problem was my phone wasn't recognizing my sim card nor did it give me my IMEI number, which is why I thought I might of messed up the EFS Partition. But thank you for the reply.
 

mattie_49

Senior Member
  • Feb 4, 2010
    2,777
    844
    Seymour Tn
    OnePlus 9
    I'm about out of options anyone tried using smt download mode on msm tool.? Then restoring efs partitions.? And had any success. I'm getting a sha 256 does not match error on msm tool when trying to download super partition. Op8 verizon bricked.
     

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      Hey all, I did a bad thing. Please help.

      Just wanna start off by saying I'm really stupid and things like this make me not want to modify my device anymore. I recently updated to 10.3.0, and after flashing something in the wrong order, I soft bricked my OP6. Since I wanted to basically start over with Android 10, I decided to just do a full wipe, without reading how to. I wiped all partitions through TWRP (Which I very quickly learned is a stupid thing to do) because that it how I went about installing new ROMs on my old phone. That left me with just the bootloader on my phone and nothing more. So I used fastboot to flash recovery and 10.3.0 and everything was fine, or at least I thought.

      Everything has been fine for about a week now, until my phone randomly restarted. Upon reboot, my sim card wasn't reading and whenever I tried going to it's settings, it would say "com.android.phone keeps stopping" and after a bunch of searching around... I learned what an EFS Partition is and I'm pretty sure that bad boy is gone. Putting *#06# in the keypad gives me a MEID number, but no IMEI number.

      So my question now is, is there anything I can do? I found a few posts that say you could try flashing ColorOS (but there is only an unofficial port for OP6), one comment I found said to use a program called EFS Professional and flash back to stock, and some others suggested MSM tool? Which I haven't used, so I have no clue what that's about. Does anyone have experience or a suggestion for me, please? Any help is greatly appreciated.

      My phone is also completely working right now, apart from sim card use. The sim was also 100% working for about a week, before it randomly rebooted, is that normal? I just want to get my phone back to working order, I'm done with modifying. I feel stupid and defeated lmao, oh man, pls help.

      Alright calm down, yes what you have done isn't smart to do but nothing is gonna change that, we can't go back in time.
      First of I would start with restoring your device by using the the MSM Download Tool which you can find here --> https://forum.xda-developers.com/oneplus-6/how-to/tool-msmdownloadtool-v4-0-international-t3798892
      All you need to know is described in the thread, read it carefully before attempting to restore your device. It will re-lock the bootloader, wipe the internal storage and restore all the partitions on your device. Make sure you made a backup of all your important files which might be stored on your device. If those instructions are still not clear enough you could watch this video which shows how to restore your device, here is a link to that video --> https://www.youtube.com/watch?v=jtc7EhNsfPA&feature=youtu.be
      After restoring your device you should check if your device shows it's IMEI number again, if not I can't help you further. I've never used the EFS Professional tool with the OP6. So attempting to restore the IMEI with that tool is on your own risk.
      I hope you learn from this experience, you should always make backups of the important partitions of your device before even thinking about modifying the system on your device in any way. This won't change your current situation by saying this but it will be helpful in the future.
      Good luck!
      1
      Hi, thank you so much for the quick reply. So apparently it was just a problem with xXx NoLimits, I think? I tried uninstalling it right after making the original post and now my sim is working like normal. I'm confused because I don't think I had any settings with NoLimits that should of affected the sim or even storage of my phone. So why would it work fine for a week and just randomly decide to kill itself like that? As you can see in the screenshots, my IMEI was missing and is now back.

      But I'm still worried about when I had wiped all partitions, is there something funky going on with the partitions/storage of my device? Is the "EFS Partition" the only partition that can be permanently lost? If I can still make a backup of it, I should definitely do that, and is there anything else I specifically should make sure I have backed up?

      No problem!
      Strange, sounds like something you configured in your xXx NoLimits config caused some trouble. Maybe you debloated an app that causes this behavior? It would be a guessing game for me.
      If I was you I would restore the device using the MSM Download Tool to start clean again. After that I would make a full system backup using TWRP. So in case you do lose the EFS partition or something else you will have something to fall back on.
      The EFS partition can indeed be lost but you would really need to badly mess with the system on your device. I've only once experienced a lost IMEI number after a system update on my LG G4 but I could restore it using the EFS Professional tool. The actual EFS partition was still there I think but got corrupted somehow. Luckily I had made a backup of that partition with TWRP but I still needed to write the IMEI number to it manually. You should just always make backups before attempting to modify the system on your device. Lesson learned right? ;)
      1
      Nolimit and random reboot in android 10.0.3? Turn off kernel tweaks in Nolimit profiles, and then flash Nolimit. It will be fine.
      1
      Thank you so much for this info. May I ask what the best way to actually backup the EFS Partition would be? After a quick google search, a few different apps popped up. But based on your reply, I'm assuming you've done this before, so is there a certain method you would suggest for a noob like myself?

      And as far as using the MSM Tool for a complete reset/backup, do you think that would really be necessary? From what I've read, newer versions of TWRP don't even let you delete/backup the EFS Partition, which means it would be unlikely that I even actually touched that partition, right? And my experience was most likely caused by some xXx NoLimits setting then, I'd assume. I think what messed me up when I first upgraded to 10.3.0, was that I accidentally wiped the Vender partition (which I believe is what the recovery is now on?) Which is why I had to flash via fastboot. But still, I would like to backup the EFS Partition just to be assured I won't have this come up in the future. But outside of the EFS Partition, isn't it pretty easy to fix any Partition/Bricks that might occur on the OnePlus 6?

      And again, thank you so much for taking the time to respond to a silly goose like me. I've made it this far without damaging ant of my phones but I think it's about time I stop playing with fire and actually read/backup important stuff haha.

      I have always used TWRP for making a backup of the EFS Partition, the option to do so is still available in the backup section in TWRP. It is indeed very unlikely you ever touched that partition but as you experienced it isn't hard to mess up the installation of your system so you should definitely back it up just to be sure you could restore it if something goes wrong. If I'm not mistaken the recovery is actually written to the boot partition and not the vendor partition or that has changed since Android 10. But I don't see any reason to ever wipe the vendor partition. You should always carefully read instructions before installing any kind of software so you are sure you are doing it right. And yes, fixing soft bricks on the OP6 isn't hard to do when you know what you are doing. Doing research is very important, by doing so you know what you are doing, how you should do it and you will have a higher chance to fix errors in case things don't turn out to work as they should. Luckily things didn't go very wrong for you but I hope you'll spend some time doing research before you are going to modify the system on your device. It will prevent a lot of trouble. But by making mistakes you will learn to right. ;) Oh and I almost forgot to mention that you should copy your backups to an other device or storage in case your internal storage gets wiped.
      It's not a problem to give a helping hand, that's what this place is for. I'm always glad to help those who kindly ask for help. :good:
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