How To Guide [GUIDE] How to unbrick your Nord N200 5G (ALL VARIANTS) or switch bootable slot (REQUIRES UNLOCKED BOOTLOADER)

[Travisholt92]

Hey guys,

I am trying to update my N200 to the newest OxygenOS, because it keeps nagging me to if I don't.

The first thing I tried was to re-flash the stock boot.img from the extracted OTA (which replaced Magisk with the stock recovery, too) - but still kept getting an installation error.

So I followed the steps above, and flashed *that* payload.bin with the Fastboot Enhanced tool - but it keeps boot-looping me back to fastboot mode. I think the partitions have changed sizes or something, and there's a message saying there were unknown partitions in the payload.bin too.

So for now, I'm flashing back to "OnePlusN200Oxygen_10.O.11_OTA_011_all_2203021426_2dd4f42a2d0545a3" and restoring my TWRP backup (which includes a "super" partition, but of that build), but if anybody can advise how I can update it to the DE2117_11_C.15 build, that would be great.

Hopefully there is a way to do it without erasing data. Usually for other phones I just unroot, install OTA, then re-root. But it seems trickier with the partition size nonsense going on here.

Edit: OnePlus download site hasn't updated the links yet, but there was a full OTA posted on XDA a few days ago, link here.

It probably keeps booting to fastboot (see OP for more info on your data/metadata partitions self destructed) after it did qcom kernel panic crashdump mode a few times. Assuming you didn't manually create the "my_" partitions in that OxygenOS 12 payload bin you're trying to run. I am successfully running that build on my TMobile variant fastboot enhanced will give you the full list of partitions.

 

[drfsupercenter]

It probably keeps booting to fastboot (see OP for more info on your data/metadata partitions self destructed) after it did qcom kernel panic crashdump mode a few times. Assuming you didn't manually create the "my_" partitions in that OxygenOS 12 payload bin you're trying to run. I am successfully running that build on my TMobile variant fastboot enhanced will give you the full list of partitions.

Yeah, I don't know but now I can't even get the previous one to work either, I keep getting stuck in fastboot and it won't reboot to fastbootd mode. I've followed your commands a few times now:

fastboot flash dtbo_a dtbo.img
fastboot flash dtbo_b dtbo.img
fastboot flash boot_a boot.img
fastboot flash boot_b boot.img
fastboot flash vendor_boot_a vendor_boot.img
fastboot flash vendor_boot_b vendor_boot.img
fastboot --disable-verity --disable-verification flash vbmeta_a vbmeta.img
fastboot --disable-verity --disable-verification flash vbmeta_b vbmeta.img
fastboot --disable-verity --disable-verification flash vbmeta_system_a vbmeta_system.img
fastboot --disable-verity --disable-verification flash vbmeta_system_b vbmeta_system.img

But then I still can't get into fastbootd. it says: fastboot: error: Failed to boot into userspace fastboot; one or more components might be unbootable.

Edit: as far as "super" goes, I have the super.emmc.win backup from your TWRP, I was able to restore it before I don't think I can fastboot that.

 

[Travisholt92]

Yeah, I don't know but now I can't even get the previous one to work either, I keep getting stuck in fastboot and it won't reboot to fastbootd mode. I've followed your commands a few times now:

fastboot flash dtbo_a dtbo.img
fastboot flash dtbo_b dtbo.img
fastboot flash boot_a boot.img
fastboot flash boot_b boot.img
fastboot flash vendor_boot_a vendor_boot.img
fastboot flash vendor_boot_b vendor_boot.img
fastboot --disable-verity --disable-verification flash vbmeta_a vbmeta.img
fastboot --disable-verity --disable-verification flash vbmeta_b vbmeta.img
fastboot --disable-verity --disable-verification flash vbmeta_system_a vbmeta_system.img
fastboot --disable-verity --disable-verification flash vbmeta_system_b vbmeta_system.img

But then I still can't get into fastbootd. it says: fastboot: error: Failed to boot into userspace fastboot; one or more components might be unbootable.

Edit: as far as "super" goes, I have the super.emmc.win backup from your TWRP, I was able to restore it before I don't think I can fastboot that.

Your options are msmtool (if possible), my TWRP to get you fastbootd (if possible), make sure to use a boot image that matches the stock build# of your vendor partition. It automatically switches slots after so many failed boot attempts and wipes metadata.

 

[drfsupercenter]

Your options are msmtool (if possible), my TWRP to get you fastbootd (if possible), make sure to use a boot image that matches the stock build# of your vendor partition. It automatically switches slots after so many failed boot attempts and wipes metadata.

How do I use your TWRP without a working fastbootd?

C:\platform-tools>fastboot boot twrp.img
Sending 'boot.img' (98304 KB)                      OKAY [  2.097s]
Booting                                            FAILED (remote: 'unknown command')
fastboot: error: Command failed

It doesn't work unless I do it in fastbootd mode.

And yes I know about switching slots... FastbootEnhance lets you switch between A/B, I tried both, ran the commands on both, neither one gets me into fastbootd mode.

I also can't do msmtool because it's the unlocked variant, not T-mobile. Otherwise I would have done it in the first place!

This is so weird though. I had this exact thing happen earlier and was able to fix it.

Once I get TWRP booted (please tell me how!) I can restore my working backup and be good for now - then it's just a matter of figuring out that pesky update.

 

[Travisholt92]

How do I use your TWRP without a working fastbootd?

C:\platform-tools>fastboot boot twrp.img
Sending 'boot.img' (98304 KB)                      OKAY [  2.097s]
Booting                                            FAILED (remote: 'unknown command')
fastboot: error: Command failed

It doesn't work unless I do it in fastbootd mode.

And yes I know about switching slots... FastbootEnhance lets you switch between A/B, I tried both, ran the commands on both, neither one gets me into fastbootd mode.

I also can't do msmtool because it's the unlocked variant, not T-mobile. Otherwise I would have done it in the first place!

This is so weird though. I had this exact thing happen earlier and was able to fix it.

Once I get TWRP booted (please tell me how!) I can restore my working backup and be good for now - then it's just a matter of figuring out that pesky update.

Your fastboot is probably outdated. guessing you're using something like minimal adb/fastboot those tools are outdated and don't work with this device

 

[drfsupercenter]

Your fastboot is probably outdated. guessing you're using something like minimal adb/fastboot those tools are outdated and don't work with this device

No, the newest platform-tools downloaded an hour ago.

Doesn't matter whether I activate slot A or B, same result. If I do "fastboot flash boot twrp.img" as well, goes right back to fastboot too.

 

[NeonWhitey]

I allowed a security/software update to install on my phone the other day. Now I am unable to make any calls. It doesn't even connect to voicemail just goes to call ended. My service provider isn't having issues and tech support isn't able to help it seem. I'd like to know if anybody can provide a guide on how to roll back the update. I'm currently on DE2117_11_C.16 and would like to get back to C.15!

Thanks!

 

[Maatt_OG]

It surprises me there are no success stories commented.
There was a user in the telegram chat that was waiting (for a few days) to be able to send their device back to OnePlus. I let others try to come up with solution for a few days before i took the time to dive into the issue myself.

Immediately upon following this tutorial, they had restored functionality of slot B on their device and avoided sending the device to OnePlus to fix.

As a proof of concept I updated slot A and recreated the super.img for slot A and could easily go back to slot B by flashing my backup super.img(which was for slot B) and switching active slot back to slot B. So made this guide for them to restore proper setup of the super partition.

I hope this guide can help others as well.

hey are you talking about me? lololololol jk

 

[NeonWhitey]

Where am I supposed to get the super.img? Does somebody have one I can snag? Or something about a TWRP?

 

[swee08315]

Then try again to see which slot is bootable, if neither you lost too much in your super partition that is needed to run recovery, grab a backup of a super.img from someone on here and fastboot flash super super.img, depending on which slot that super.img is meant for, that will be the slot you will need to be on to proceed with the rest of the fixing

I bricked my unlocked version, not realizing there was an important difference between it and the T-Mobile version.

I’ve followed the steps up until the quoted portion. Looks like I can’t get into fastbootd on either partition and am in need of the super.img. I dumped the payload from the linked update but it’s not included.

 

[Travisholt92]

I bricked my unlocked version, not realizing there was an important difference between it and the T-Mobile version.

I’ve followed the steps up until the quoted portion. Looks like I can’t get into fastbootd on either partition and am in need of the super.img. I dumped the payload from the linked update but it’s not included.

Use msmtool it is available for unlocked variant now

 

[swee08315]

Use msmtool it is available for unlocked variant now

Where can I find it? Everytime download link I find is prefaced with "TMOBILE".

 

[Travisholt92]

Where can I find it? Everytime download link I find is prefaced with "TMOBILE".

Index of /list/Unbrick_Tools/OnePlus_Nord_N200

 

[swee08315]

Index of /list/Unbrick_Tools/OnePlus_Nord_N200

Thank you! Just finished the whole process and it's booted back up to stock.

 

[purplepeanut111]

Index of /list/Unbrick_Tools/OnePlus_Nord_N200

Been thinking I was screwed all night, and just found this. Solved all my oneplus problems for now, thank you!

 

[xFadedxShadow]

Use msmtool it is available for unlocked variant now

Could you send a link please can't seem to find it myself. That and i haven't used the MSMTOOL if you could point me into the right direction. mine is the "Nord N200 5G Unlocked Variant" Will the tool also recreate missing paritions or re flash a super partition?

 

[xFadedxShadow]

Nevermind i found the download will this work for the Unlocked Variant though?

 

[Travisholt92]

Nevermind i found the download will this work for the 5G Variant though?

All Nord N200s are 5G

 

[xFadedxShadow]

Yea i know that i was saying that i have the Unlocked Variant of the phone. Just missed typed it my bad

 

[Travisholt92]

The link has 2 different firmware files, for both carrier branded variant and unlocked. Click it and see