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[Thread doubts] OnePlus 7 chinese version [GM1900]

Hi guys, I open this thread to solve problems / doubts of this chinese version of One Plus 7 GM1900 because I guess many will be in my place.
I tell you my case:
My intention is to open bootloader to be able to put custom recovery TWRP and root it with Magisk.
Once I have it, I have doubts:
1. If I want to remove TWRP and Root, and I will leave all stock, what steps should I take?
2. If I am in OOS (for example 9.5.2) with TWRP and root and want to upgrade to a new version of OOS (for example 9.5.6), what steps do I have to follow?
3. I would like to know if this is true, and if so, what would be the solution: I have read that when a Wipe System is made from Twrp, the bootloader can be closed or that the phone does not start in fastboot mode causing a crash. Is this true?. I thought about when I wanted to install a cleaner ROM stock, make a Wipe System, data, cache and dalvik and then flash the rom, and according to that it might not be possible.
Thank you.

Hi, are these Treble GSI roms compatible with the OnePlus 7 (not pro) Chinese version GM 1900 ???
Roms Treble GSI:
https://forum.xda-developers.com/project-treble/trebleenabled-device-development

hardware is the same, firmware also fits from EU/Indian devices. next time just use search.

tURkOsANsE said:
1. If I want to remove TWRP and Root, and I will leave all stock, what steps should I take?
Click to expand...
Click to collapse
Flash the stock ROM and reboot. You'll have a phone with stock recovery and ROM with no root access. It won't relock your bootloader though, so you'll have to do it with: fastboot oem lock
2. If I am in OOS (for example 9.5.2) with TWRP and root and want to upgrade to a new version of OOS (for example 9.5.6), what steps do I have to follow?
Click to expand...
Click to collapse
You always need to flash full ROM zips if you're rooted and want to update. However to keep the custom recovery (TWRP), you need to flash the TWRP installer along with the ROM. Then to not lose root access you'll have to reboot to TWRP and flash Magisk. Just follow these steps:
1. Boot to TWRP
2. Flash ROM
3. Flash TWRP installer
4. Reboot to TWRP
5. Flash Magisk
6. Reboot to system
3. I would like to know if this is true, and if so, what would be the solution: I have read that when a Wipe System is made from Twrp, the bootloader can be closed or that the phone does not start in fastboot mode causing a crash. Is this true?. I thought about when I wanted to install a cleaner ROM stock, make a Wipe System, data, cache and dalvik and then flash the rom, and according to that it might not be possible.
Click to expand...
Click to collapse
I haven't tried that yet. But since TWRP builds are official, I don't think there are bugs like that. Why don't you give it a try and let us all know?

@dewri21 Thank you very much for your answers, you have helped me a lot, thank you for your clear explanations, please like this, help those who are starting in this world.
dewri21 said:
I haven't tried that yet. But since TWRP builds are official, I don't think there are bugs like that. Why don't you give it a try and let us all know?
Click to expand...
Click to collapse
Hehehehe I dare not do it, I could run out of mobile phone and end up with a brick. At the moment if I want to put clean OOS I think I will use Fastboot mode. Let's see if a partner who knows how to get out of a brick does Wipe Sistem and confirms that.

FASTBOOT: https://forum.xda-developers.com/oneplus-7/how-to/rom-stock-fastboot-roms-oneplus-7-t3937478
Hi guys, I am writing to let you know that I have flashed the fastboot 9.5.6 BA ROM in my OnePlus 7 Chinese version GM 1900 and it worked perfectly. I was in TWRP, Root Margisk and Custom Kernel, and now I'm back in Stock. My device being a Chinese version came with ROM AA when removed from the box, and I confirm that the BA version can also be set up by Fastboot.
Add that as it is said, the first restart is slow, it stays a while in the warning screen of bootloader open, but it advances with the start. In my case I have not had to restore factory.
Very happy with this method to be able to return to Stock.

Hello, has anyone tried this on our OnePlus 7 to fix a brick? It seems that it is the MsMdonwloadsTools for our OnePlus 7. Someone who has a brick can try it and tell us if it works.
https://repairmymobile.in/flash/oneplus-7-flash-file/amp/

MsmDownloadTool For OnePLus 7: https://forum.xda-developers.com/oneplus-7/how-to/unbrick-tool-oneplus-7-msmtool-hydrogen-t3953240

How to get back to A10 after custom rom

Hi all so I am planning to install a Havoc OS on my phone with TWRP and Magisk
So my question is in the event that the install doesnt work out for me or that I dont like the rom (no rearson why I shouldnt) how do I get back to the original A10 rom?
I have downloaded the OxygenOS 10.0.6 [EU] OnePlus 7 Pro 5G.zip file from here already. Would I be able to go ahead boot into TWRP and flash this ifneeded?
TIA Bart

bartjunited said:
Hi all so I am planning to install a Havoc OS on my phone with TWRP and Magisk
So my question is in the event that the install doesnt work out for me or that I dont like the rom (no rearson why I shouldnt) how do I get back to the original A10 rom?
I have downloaded the OxygenOS 10.0.6 [EU] OnePlus 7 Pro 5G.zip file from here already. Would I be able to go ahead boot into TWRP and flash this ifneeded?
TIA Bart
Click to expand...
Click to collapse
Hi Bart,
Make sure you keep TWRP recovery after flashing custom Rom.
Then if you want to go back, flash official Rom zip on both slots after formatting data otherwise it won't boot.

Thanks for that.
Only thing I'm not sure is what you mean by flashing to both slots?
If for example you get a boot loop can you still get into TWRP?
I assume this is a yes as this is before it boots into the phones OS?

bartjunited said:
Thanks for that.
Only thing I'm not sure is what you mean by flashing to both slots?
If for example you get a boot loop can you still get into TWRP?
I assume this is a yes as this is before it boots into the phones OS?
Click to expand...
Click to collapse
When returning to stock,
format data
Flash stock zip
Flash TWRP
Reboot into recovery which is TWRP
Follow the same steps again and reboot...
If you end up in boot loop, don't stress. You can always flash TWRP recovery again via fastboot.

Probably encrypted device TWRP files with weird file names - Android 12

Since oneplus 6 nas no security updates i decide to install custom ROM LineageOS 19.1 the newest build from official website.
Before installing this ROM i do all steps gently from Funky Wizard guide.
I have ADB drivers, unlock bootloader, installed magisk (rootet phone) backup my OOS and EFS, and installed twrp.
All basic stuff. Now i was ready to go to installed lineageOS.
I install lineage and i do all steps by their official website but with twrp. ( only what i dont flash copy partition zip file i wasnt sure if that will be work with twrp ).
After restart to recovery i must install gapps. Unfortunely the recovery was replaced i was assumed istead of twrp.
I installed gapps with their recovery and all work fine until i want to replace to twrp.
Now when i boot temporarly from img to install it perm. I have weird folder names wihtout any possibility to add ZIP file.
With some research i guess that folders are somehow encrypted.
Could you help me to install twrp with lineageOS when i have still access to this files? I need it for ex. recovery to stock if something in future goes wrong.
And i am currently on android 12 for sure.
Thank you from feedback!

first of all, you'd be better of if you posted this in the right area ==> https://forum.xda-developers.com/t/rom-official-enchilada-12-lineageos-19.4437321/ ==> more chance to get help related to LOS 19 questions (it's pure chance I saw your post here)
second: make sure to follow the instructions given at the LOS instructions pages ==> https://wiki.lineageos.org/devices/enchilada/
Mostly it is important that you have latest OOS 11 firmware installed in both slots before you start with LOS.
For the first steps never mind which recovery you have, just follow the instructions using LOS recovery. Reason is that TWRP is having problems wiping data / performing factory reset, at least it never worked for me. Then later on you can switch to TWRP
Back in May this year I wrote an instruction set here: https://forum.xda-developers.com/t/rom-official-enchilada-12-lineageos-19.4437321/post-86879331
Interesting for you right now is everything below 1.x
2.x is a separate instructiopn set for OTA updates coming later on
Good luck!

Thank you for response. You have right its better to install it directly from dedicated recovery (lineage) and than replace with twrp. Also i fill missing steps (install recovery again and flash parition integration file) and also wipe all data as instruction says. Now after reinstall lineageos and then install twrp i have all normal structure files as before. Thanks again

Question Install official RUI updates from TWRP?

So, I rooted my phone, for which I needed to unlock the bootloader and install TWRP. Now, when I want to install an update on my phone, it downloads and when I want to install it, it jumps to TWRP recovery instead of the phone's recovery, so I can't update my phone. Does anyone know how can I install the updates from TWRP?
Else, reinstall the default recovery. (Only the recovery, not the entire OS since that would un-root my phone)
Thanks.
Edit: After it boots to TWRP, it apparently tries to install the update, since I can see it on the log, but when I reboot my phone it has not installed. It errors: "E3994: This package is for "2169B" devices; this is a "". Updater process ended with ERROR: 1. Error installing zip file '/data/ota_package/OTA/.otaPackage/my_manifest_RMX3370_11.F.04_3040_202302282047.44.36402b59_all.zip'
Edit 2: After failing to install it, it prompts me to re-download it and re-install it, but it jumped from ~500MB update to 4.76GB update.

( may loose data)
I read in telegram channels, this twrp: https://www.pling.com/p/1922292 support installation latest zip. but I haven't tried.
one more thing you can do is ( may loose data)
1. restore twrp backup for recovery partition ( if you don't have backup. search recovery.img in upgrade zip )
2. reboot to recovery to check stock recovery is installed
3. install update
4. then follow steps to install twrp and magisk ( root again )

SanOne+1 said:
( may loose data)
I read in telegram channels, this twrp: https://www.pling.com/p/1922292 support installation latest zip. but I haven't tried.
one more thing you can do is ( may loose data)
1. restore twrp backup for recovery partition ( if you don't have backup. search recovery.img in upgrade zip )
2. reboot to recovery to check stock recovery is installed
3. install update
4. then follow steps to install twrp and magisk ( root again )
Click to expand...
Click to collapse
Your guide is incorrect and will definitely put the device into bootloop.
** The twrp link that you shared doesn't allow system updates to install, it is just a A13 compatable twrp recovery.
1) What if that person has not created any twrp backup of all system partitions? According to his explanation, I'm pretty sure he has not created any backup of the partitions.
2) only flashing recovery image and installing the update will again put the device into bootloop because as confirmed by the OP that his device is rooted and due to root the boot image of the device gets modified so it will put the device into bootloop.
3) unless the OP has stock boot and recovery images at his disposal he should not attempt to install the update to avoid bootloop.
** Kindly avoid sharing incorrect information you aren't sure about the correct procedure.
procedure that I follow to flash updates :
1) in magisk - uninstall magisk - restore images
2) boot device into bootloader and flash stock boot and recovery.
3) boot device and install update.
4) put device again in bootloader and flash twrp and within twrp flash magisk and reboot.
I haven't found any easier way than this. If anyone has, kindly put it below.

There's a way
Rui 4.0 Android 13 f.02
So, any verdict on this new update for the people that did update to it?
forum.xda-developers.com

Recetly I succesfully updated my Realme GT Neo 2 5G via TWRP recovery, the latest version support OTA.
Attention! After update TWPR and Magisk gone. Just reflash twrp and flash magisk normally. No need to reflash modules etc. (Just update from settings, no need to manually flash ota package from TWRP)

Hello mate can u help me with something real quick. Y are there no recent updates for gt neo 2 and if u r using a custom rom based gt neo 2 hows ur experience so far. Thanks in advance
Xemi_KryTeT.pl said:
Recetly I succesfully updated my Realme GT Neo 2 5G via TWRP recovery, the latest version support OTA.
Attention! After update TWPR and Magisk gone. Just reflash twrp and flash magisk normally. No need to reflash modules etc. (Just update from settings, no need to manually flash ota package from TWRP)
Click to expand...
Click to collapse
Which rom r u running and is it good?

Sabirsayed09 said:
Hello mate can u help me with something real quick. Y are there no recent updates for gt neo 2 and if u r using a custom rom based gt neo 2 hows ur experience so far. Thanks in advance
Which rom r u running and is it good?
Click to expand...
Click to collapse
Latest stock (4.0), I'm not going to flash custom roms for now

Question Going from lineage 20 to pixel extended. What do I do about recovery?

Sorry, I couldn't find the answer. I installed lineage 20 on my one plus 9. I also installed the custom recovery required by lineage. I want to try out the pixel rom but what do I do about the custom lineage recovery? Do i use msm tools to restore it first? or can i install the unofficial twrp i saw on this forum instead or is there a stock recovery I can easily find to change it back? Thanks for any help.

gisted said:
Sorry, I couldn't find the answer. I installed lineage 20 on my one plus 9. I also installed the custom recovery required by lineage. I want to try out the pixel rom but what do I do about the custom lineage recovery? Do i use msm tools to restore it first? or can i install the unofficial twrp i saw on this forum instead or is there a stock recovery I can easily find to change it back? Thanks for any help.
Click to expand...
Click to collapse
I just made this same switch now back on stock waiting for 13.1 Download dtbo,vendor_boot,boot from pixel extended. Flash all 3 In fastboot. Reboot recovery wipe data sideload Pe

Thanks for the help!

gisted said:
Sorry, I couldn't find the answer. I installed lineage 20 on my one plus 9. I also installed the custom recovery required by lineage. I want to try out the pixel rom but what do I do about the custom lineage recovery? Do i use msm tools to restore it first? or can i install the unofficial twrp i saw on this forum instead or is there a stock recovery I can easily find to change it back? Thanks for any help.
Click to expand...
Click to collapse
OnePlus 9 does not have a dedicated recovery partition anymore (most modern phones don't have anymore). Instead, recovery now resides inside boot, meaning they share the same kernel. That's the reason every ROM instruction says to flash the provided boot, vendor_boot and dtbo images. Note that these 3 images are the same found in that particular ROM zip. Anyway, the point is that when you flash boot, the recovery is flashed too.
So, in your case, even if you are on LineageOS 20, and you can access LineageOS recovery, you can just go ahead and do a factory reset and flash the Pixel ROM through adb sideload. After that, boot, vendor_boot and dtbo will be automatically flashed/updated to Pixel's. But the recommended way is still to make sure you first flash those given 3 images before going to recovery and proceeding with factory reset and flashing.