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How to recover from bootloader relock brick

Hello,
I have MIX 3 Chinese version, unlocked bootloader, flashed latest global. Fine
For security purposes, tried to lock bootloader with fastboot - I knew it may be risky- now the device is in Mi recovery 3, refused to reboot even after erase data.
How to bring it back to life.
Thanks

Use the XiaoMiTool V2.
Google it

Can you enter fastboot mode?, If yes use mi flash and flash original chinese rom.

GVN.Gallus said:
Can you enter fastboot mode?, If yes use mi flash and flash original chinese rom.
Click to expand...
Click to collapse
Yes I can enter fastboot. Even I check bootloader status now locked.
Could you refer a link where all the process is explained? I am not conversant with mi flash.

visit https://www.xiaomitool.com/V2/ and good luck

Nakbleu said:
Yes I can enter fastboot. Even I check bootloader status now locked.
Could you refer a link where all the process is explained? I am not conversant with mi flash.
Click to expand...
Click to collapse
Follow instruction here, make sure to download lastest Miflash and correct rom, for fastboot rom use mifirm.net

grandman1701 said:
visit https://www.xiaomitool.com/V2/ and good luck
Click to expand...
Click to collapse
XiaoMiTool V2 won't be able to unbrick your device in the cases "This MIUI Version can't be installed on this device" error

Nakbleu said:
Yes I can enter fastboot. Even I check bootloader status now locked.
Could you refer a link where all the process is explained? I am not conversant with mi flash.
Click to expand...
Click to collapse
Fastboot is fairly simple. Download the latest Chinese from from miui.com, unzip it, connect your device in fastboot mode, and run the flash_all.bat file. It will take a while and the command prompt window will close when it is finished and your device will reboot.

jcsww said:
Fastboot is fairly simple. Download the latest Chinese from from miui.com, unzip it, connect your device in fastboot mode, and run the flash_all.bat file. It will take a while and the command prompt window will close when it is finished and your device will reboot.
Click to expand...
Click to collapse
I am downloading the ROM.
Please can provide step by step instructions?
My understanding is to:
1. copy the rom in minimal fastboot directory
2. unzip all files in that same directory (or should I create new one?)
3. Execute the command below:
fastboot flash_all.bat
By the way, can I use fastboot with locked bootloader?
Thanks again

Nakbleu said:
I am downloading the ROM.
Please can provide step by step instructions?
My understanding is to:
1. copy the rom in minimal fastboot directory
2. unzip all files in that same directory (or should I create new one?)
3. Execute the command below:
fastboot flash_all.bat
By the way, can I use fastboot with locked bootloader?
Thanks again
Click to expand...
Click to collapse
If you have ADB installed system wide, then it doesn't matter where you unzip the full image to. The best way to have ADB installed system wide is through this method.
You don't need to type anything. Just open the folder the ROM was decompressed in, right click the flash_all.bat, and run it as administrator with your device connected in fastboot mode. It will literally do everything else.

jcsww said:
If you have ADB installed system wide, then it doesn't matter where you unzip the full image to. The best way to have ADB installed system wide is through this method.
You don't need to type anything. Just open the folder the ROM was decompressed in, right click the flash_all.bat, and run it as administrator with your device connected in fastboot mode. It will literally do everything else.
Click to expand...
Click to collapse
I unzip the rom using 7zip, but couldn't find flash_all.bat file!

Nakbleu said:
I unzip the rom using 7zip, but couldn't find flash_all.bat file!
Click to expand...
Click to collapse
Did you install ADB 1.4.3 from the thread linked to? Do you have your device connected to a USB 3 port or USB 2 port? Are you using the cable that came with your device to flash it? Were you booted into the bootloader when trying to flash?
Edit: Read that post wrong. You need to download the fastboot version. You can't flash the TWRP image using fastboot.

jcsww said:
Did you install ADB 1.4.3 from the thread linked to? Do you have your device connected to a USB 3 port or USB 2 port? Are you using the cable that came with your device to flash it? Were you booted into the bootloader when trying to flash?
Edit: Read that post wrong. You need to download the fastboot version. You can't flash the TWRP image using fastboot.
Click to expand...
Click to collapse
Yes I did all that.
I am getting error: Erase is not allowed in lock state.
Any workaround please?

re-unlock the device. it's locked right now.

erbsenmatsch said:
re-unlock the device. it's locked right now.
Click to expand...
Click to collapse
Won't be possible with the Mi unlock software as the phones been wiped - no account, no OEM allowed ticked etc.

in that case, your only hope is: sending it back to china
where did you buy it?

erbsenmatsch said:
in that case, your only hope is: sending it back to china
where did you buy it?
Click to expand...
Click to collapse
In UK. Gray import. I really don't understand why a manufacturer should let this be possible. Why not just make it unlockable with global rom? This will avoid such unwanted situation for everybody. Pissed off by Xiaomi

Bootloop, only fastboot and EDL mode no system boot please help Axon 10 Pro

hi Guys
I'm in the forum for a very long time as an assistant helper now it has got me hard I have an Axon 10 Pro with curly boot loader and trying to flash a TWRP I have somehow the device or SotA and SlotB have shrunk. The Axon Bootet permanently in 0.5 second cycle and also a FULL Restot or FULL Flash with EDL Tool has not changed anything. Likewise, a new flash about fastboot with the command (fastboot flash boot_a boot.img) the same for boot_b then try with fastboot command (fastboot boot twrp.img) Recovery to start without success fastboot erase boot_a and boot_b has also flashing new but it does not start. Always bootloop:crying::crying::crying::crying:

the Axon 10 pro is back because he had no backup of all we had from my Axon 10 pro made a backup with the edl tool (Backup all) and have then copied his efs backup purely and then this with then on the Axon 10 flashed the Axon 10 pro is now back

Where did you get the twrp from?

From udev
On his donload page
https://forum.xda-developers.com/showpost.php?p=80156866&postcount=3

I had a bootloop issue as well and even though I reflashed using the EDL tool, it doesn't erase and the errors remained, but when I entered EDL mode and reflashed using the Xiaomi Flash Tool, storage was completely erased and the device was flashed cleanly and booted correctly.

I've encountered a similar issue with my Axon (2020U version). I can boot into EDL but nothing else (no fastboot, recovery, etc.). I previously had TWRP up and running successfully, not sure what happened.
Is there a full EDL zip or similar that I can flash to return everything to stock? I tried restoring with the EDL tool but with no success

jbeaulieu said:
I've encountered a similar issue with my Axon (2020U version). I can boot into EDL but nothing else (no fastboot, recovery, etc.). I previously had TWRP up and running successfully, not sure what happened.
Is there a full EDL zip or similar that I can flash to return everything to stock? I tried restoring with the EDL tool but with no success
Click to expand...
Click to collapse
The reason the EDL tool may not work is that is doesn't have the capability to erase. The boot loop that occurs is usually due a corrupt bootfile. Use the MiFlash fastboot recovery tool. Make sure to select the clean all button at the bottom. Place your phone in EDL mode. Hit refresh to make sure your phone is detected. Select the EDL file and then hit flash.

jim262 said:
The reason the EDL tool may not work is that is doesn't have the capability to erase. The boot loop that occurs is usually due a corrupt bootfile. Use the MiFlash fastboot recovery tool. Make sure to select the clean all button at the bottom. Place your phone in EDL mode. Hit refresh to make sure your phone is detected. Select the EDL file and then hit flash.
Click to expand...
Click to collapse
Apologies for my ignorance - what exactly am I flashing? I see the "clean all" radio button, but I'm not sure what EDL package to flash after selecting that option - is there a 2020U package floating around that I'm not seeing?

jbeaulieu said:
Apologies for my ignorance - what exactly am I flashing? I see the "clean all" radio button, but I'm not sure what EDL package to flash after selecting that option - is there a 2020U package floating around that I'm not seeing?
Click to expand...
Click to collapse
The EDL package, use the same EDL package that you used with the EDL tool. Just select the "clean all" radio button. Select the path to the EDL , hit refresh once phone, in EDL mode, is detected, hit flash.

jim262 said:
The EDL package, use the same EDL package that you used with the EDL tool. Just select the "clean all" radio button. Select the path to the EDL , hit refresh once phone, in EDL mode, is detected, hit flash.
Click to expand...
Click to collapse
Okay, I'm trying to use MiFlash to restore the backup I took through the original EDL tool. The MiFLash tool is only timing out with a "cannot receive hello packet" - was this something you encountered as well?

jbeaulieu said:
Okay, I'm trying to use MiFlash to restore the backup I took through the original EDL tool. The MiFLash tool is only timing out with a "cannot receive hello packet" - was this something you encountered as well?
Click to expand...
Click to collapse
I did attempt to flash the wrong EDL file (They are region and device specific) and received that error. I have the Chinese version and once I downloaded the correct EDL file, I had no issues I have even maintained an unlocked boot loader, flashed Magisk and taken OTAs.

jim262 said:
I did attempt to flash the wrong EDL file (They are region and device specific) and received that error. I have the Chinese version and once I downloaded the correct EDL file, I had no issues I have even maintained an unlocked boot loader, flashed Magisk and taken OTAs.
Click to expand...
Click to collapse
Ah, okay. I have the US version - A2020U. Unless I'm mistaken, it looks like there isn't a full EDL zip file available for my version yet, so I might be stuck

There were EDL files up, but apparently they were taken down for some reason.

in the russians there are the 1.6 of the g model as edl (which one can use in a brick) but I do not know if this is synonymous with the u model as you would have to ask @Unjustified Dev or something
@MOD
I hope that the links are allowed here else delete please
1.6 g model edl
http://4pda.ru/forum/index.php?showtopic=965431&st=0#entry88768840
And the lonk too the forum
http://4pda.ru/forum/index.php?showtopic=965431

Chris axon 7 said:
in the russians there are the 1.6 of the g model as edl (which one can use in a brick) but I do not know if this is synonymous with the u model as you would have to ask @Unjustified Dev or something
@MOD
I hope that the links are allowed here else delete please
1.6 g model edl
http://4pda.ru/forum/index.php?showtopic=965431&st=0#entry88768840
And the lonk too the forum
http://4pda.ru/forum/index.php?showtopic=965431
Click to expand...
Click to collapse
Thanks for sharing these. @Unjustified Dev do you happen to know if the 1.6 2020G EDL would be able to be flashed to a 2020U model to recover from a brick? Or if not, is there a place to obtain the proper files, either here on the forums or via PM?

jim262 said:
I did attempt to flash the wrong EDL file (They are region and device specific) and received that error. I have the Chinese version and once I downloaded the correct EDL file, I had no issues I have even maintained an unlocked boot loader, flashed Magisk and taken OTAs.
Click to expand...
Click to collapse
Please share us the EDL file for the Chinese version.

has anyone found the US EDL file yet?

Futility's Forgotten Soldier said:
has anyone found the US EDL file yet?
Click to expand...
Click to collapse
Still waiting. I'm stuck on the EU version.

"The system has been destroyed" Poco X3 NFC

So I was just messing around with my phone and somehow "destroyed" it. Is it possible to somehow flash it?

xiaomi.eu_multi_POCOX3NFC_V12.0.8.0.QJGMIXM_v12-10

MilanTom said:
So I was just messing around with my phone and somehow "destroyed" it. Is it possible to somehow flash it?
Click to expand...
Click to collapse
Don't worry dude. You can still take your phone to fastboot mode. Download a FASTBOOT rom (*.gz or *.tgz) from mifirm.net then flash it via mi-flash (download from mi-globe). Follow the instructions on mifirm.net

adadwa
ndminhdev said:
Download a FASTBOOT rom (*.gz or *.tgz) from mifirm.net
Click to expand...
Click to collapse
Ok I understand that and I've downloaded the ROM but there is this sentence "1. If Fastboot firmware. The ext. must be tgz. If not. Rename it from .gz to .tgz. Extract it by WinRAR" and also these sentences "ZIP. ZIP ROM using Update function in System or TWRP EU. EU ROM flash using TWRP".
I am just completely lost

To be simple : your flash went wrong probably with a bad rom download or a bad flash method.
If I were you I'd reread the post on installing Xiaomi.eu rom and redownload the whole.
Install OrangeFox recovery with the corresponding thread in the forum and ask if you're still lost
By the way, how did you flash that ROM?

Howell said:
By the way, how did you flash that ROM?
Click to expand...
Click to collapse
Well I started on this site https://magiskmanager.com/#How_to_I...Version_220_on_Android_Custom_Recovery_Option and downloaded the stuff that the site said was needed

And which recovery are you using ?

You should be able to reflash stock and recover your phone using the MiFlash tool.
Download fastboot ROM here, and MiFlash tool here.

And also the problem is, that my phone (Poco X3 NFC) isn't being shown in the MiFlash software. I can access the fastboot screen on my phone and yet it still won't show up

Adb drivers are installed ?

Howell said:
Adb drivers are installed ?
Click to expand...
Click to collapse
Yessir

Howell said:
And which recovery are you using ?
Click to expand...
Click to collapse
I don't know If I even have one, because when I hold Volume + and Power button, nothing happens

MilanTom said:
I don't know If I even have one, because when I hold Volume + and Power button, nothing happens
Click to expand...
Click to collapse
But I am pretty sure I tried to install TWRP Recovery

Mate that's just caused by something going wrong. The only times I get that message is the times I have tried to flash a GSI.
I don't know if you can with this unit?
I've fixed that about 5 times with miflash or miflashpro.
Do you have miflash?
It forces a reformat of Miui recovery rom an then you can start again. Just pay close attention to the bottom right hand corner an make sure it is off default. Default is 'relock bootloader'.
MilanTom said:
So I was just messing around with my phone and somehow "destroyed" it. Is it possible to somehow flash it?
Click to expand...
Click to collapse

If drivers are installed an
Howell said:
Adb drivers are installed ?
Click to expand...
Click to collapse
everything is up an running you should be able to get it into fastboot mode (picture of little rabbit fixing his android) an use miflash to reformat an force a flash of miui recovery rom.
I had that happen once with me an it turned out it was my type c cable. Pulled it out an plugged in a wala. PC could connect with my Poco

Bryceicle1971 said:
I had that happen once with me an it turned out it was my type c cable. Pulled it out an plugged in a wala. PC could connect with my Poco
Click to expand...
Click to collapse
The problem is that my computer can't find my phone. Nothing happens when I plug in the USB-C Cable. It doesn't work on the Fastboot screen nor does it work on "the System has been destroyed" screen. I am pretty sure I downloaded the neeeden drivers. And also, the phone was being found/recognized in the working state.

You need to extract then extract again. You double extract with a fastboot image. Then in miflash you find where you extracted that image to. Then hit refresh in miflash an your device should show in miflash. Miflash can be a tricky beast till you have practiced using it a few times

Hi. If you haven't fixed it yet you can try this: Download stock ROM from here (make sure it's the right one for your device!), choose Recovery ROM download link. Put it in your ADB folder. Do the same with recovery. Download this version of recovery as well. Enter fastboot mode on your device and connect it to your PC. Make sure it's detected. If not, try a different USB port on your computer. Open ADB using Open CMD.bat file in ADB folder.
Type in:
fastboot flash recovery OrangeFox-R11.0_6_Alpha-Unofficial-surya.img (hit Enter)
Type in:
fastboot reboot recovery
You should now be able to access your device internal storage from your PC. Copy the downloaded ROM file and OrangeFox-R11-Unofficial-Beta-surya-10-01.zip to your phone (put them in "Download" folder so they're easy to find).
Using Orange Fox recovery file manager find OrangeFox-R11-Unofficial-Beta-surya-10-01.zip and flash it then REBOOT TO RECOVERY.
Using Orange Fox recovery file manager find your ROM file and flash it. Do not reboot! Hit BACK and choose WIPE in Orange Fox menu (Trashcan icon, second from the right) and switch to Format Data at the top. Read the instructions and follow them by typing YES. Reboot to system. You should now have a working device with a clean stock ROM and a custom recovery installed and keep messing around with it

MocnePifko said:
Put it in your ADB folder.
Click to expand...
Click to collapse
Just two more question.
Where does one get the ADB folder? I may have downloaded a few but I don't know if those were good/correct for my device.
And what can I do when the device is not being detected by my computer? Like should I download and install some new drivers?

But can you reach the fastboot splash in your phone?

How to flash corvus os 15 Android r in redmi 10x 5g

341 redmi 10x 5G
MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.
www.mediafire.com
https://unofficialtwrp.com/wp-content/uploads/2019/11/vbmeta.zip
1 flash miui recovery img
Go to fastboot and type fastboot flash recovery recovery1.img
After that hold power button and volume up button until you see a Chinese menu with three options first select option two after that option one and after that option two after wiping data you will see that three options again select option one and select option one then hold volume down button until you see fastboot
Type fastboot reboot fastboot
Wait
You will see fastbootd then rename corvus image to system.img
Then type
Fastboot flash system.img
Click power button
Wait
When you see corvus boot animation hold power button and volume down button until you see fastboot
Rename twrp image to recovery.img
Then type
Fastboot flash recovery recovery.img
Fastboot flash vbmeta vbmeta.img
Fastboot flash misc misc.bin
Fastboot boot recovery.img
In twrp flash permissiver 5 then reboot to system
Done.
If you want gapps download magisk app
Downloading Magisk App... | Magisk Manager
The download will automatically start in 5 seconds, please click here to access the download URL directly. If you are confused and want to know how to install the Magisk Manager on your phone you can click here.
magiskmanager.com
When it's download rename it to magisk.zip
Go to twrp
Flash it
Reboot to system rename it to magisk.apk and install it after that download this file
https://sourceforge.net/projects/magiskgapps/files/r/Core/MagiskGApps-core-V1.0.zip/download
After that go to magisk in modules go to install from storage and select zip you downloaded flash it with magisk after reboot you will see play store is added to your app drawer install Google apps you need from play store

https://sourceforge.net/projects/tipzbuilds/files/GSIs/CorvusROM/Alpha/20210329/Corvus_v15.0-RavenClaw-treble_arm64_ab-nonlite-29032021-Unofficial-1117.img.xz/download

While this technique certainly appears to have been researched. Running though the instructions has resulted in my device caught in a boot-loop. A pretty serious one too. I can no longer access the bootloader or recovery/
I fear the state my device is in is 'soft bricked/ I have no clue have to resolve this and without access to the bootloader I can't rollback anything.
Some friendly notes for Hsnmastoor:
You should re-format the post. Writing the instructions then at the end supply the links and file attachments in the order in which they should be run As it is, the instructions are confusing .
If anyone has any ideas how to correct the boot loop, plug me in

resirch26 said:
While this technique certainly appears to have been researched. Running though the instructions has resulted in my device caught in a boot-loop. A pretty serious one too. I can no longer access the bootloader or recovery/
I fear the state my device is in is 'soft bricked/ I have no clue have to resolve this and without access to the bootloader I can't rollback anything.
Some friendly notes for Hsnmastoor:
You should re-format the post. Writing the instructions then at the end supply the links and file attachments in the order in which they should be run As it is, the instructions are confusing .
If anyone has any ideas how to correct the boot loop, plug
Click to expand...
Click to collapse
You flashed permissive in twrp?

Hsnmastoor said:
You flashed permissive in twrp?
Click to expand...
Click to collapse
If not flash it

Hsnmastoor said:
If not flash it
Click to expand...
Click to collapse
sim card inactive

Hsnmastoor said:
You flashed permissive in twrp?
Click to expand...
Click to collapse
I can't flash anything. I no longer have access to the bootloader or recovery. Phone is stuck in a bootloop.

resirch26 said:
I can't flash anything. I no longer have access to the bootloader or recovery. Phone is stuck in a bootloop.
Click to expand...
Click to collapse
Hold power button and volume down for fastboot. Power with volume up for recovery

dothaison said:
sim card inactiv
Click to expand...
Click to collapse
Can you check IMEI?

Hsnmastoor said:
Bạn có thể kiểm tra IMEI không?
Click to expand...
Click to collapse
I can't test IMEI

Hsnmastoor said:
Can you check IMEI?
Click to expand...
Click to collapse
can you give me nvdata backup? . I have lost my IMEI.

Hsnmastoor said:
Can you check IMEI?
Click to expand...
Click to collapse
I have lost IMEI. Can you give me a backup nvram ? thank you.

dothaison said:
I have lost IMEI. Can you give me a backup nvram ? thank you.
Click to expand...
Click to collapse
Nvram.img
drive.google.com

Has anyone flashed this successfully?

any bugs? i flashed crdroid. it's too buggy

Hi everybody,
Still mad at myself for buying this phone (with MediaTek SOC) because of the lack of custom ROM support. Never had this issue before with any of my phones. If only i knew this before. The hardware of the phone is great, but the software makes it really frustrating to work with.
So i've tried a lot of things to either mod the original (Chinese) ROM so it's at least functional. And i have also tried multiple of these GSI ROM install methods. Everytime without succes.
I've tried your previous method with the 'GSI installer' and the one from this guide. Neither of them worked. (Boot loop). I have a feeling i run into trouble because (if i'm correct) the original ROM uses a 'super' partition and not a 'system' partition.
If i remember correctly the GSI installer couldn't continue because it couldn't find the system partition.
In this guide (for corvus) i figured i'd flash the system.img to my super partition. Of cource that doesn't work either. If only it was that simple.
Everytime it fails i have to flash back to a standard xiaomi ROM and start all over again. Because for some reason the TWRP backups also dont work for me.
So maybe i'm missing a step in the guide or i've already tried so much to mod my phone i've changed settings/partitions that shouldn't have been changed for this guide to work.
My bootloader is unlocked, i have/had TWRP 3.41 installed.
After a fail i flash back to the original ROM using Xiaomi ABD/Fastboot Tools (xiaomiABDFastbootTools.jar)
Any help would be appreciated!

I never had issue when I flashed the GSI from the crdroid guide did you make sure that you put the GSI installer.zip and the image file rename to system.img to the root internal storage??

Yes i did. It could also find the system.img file, but just wasn't able to flash it.
Can you tell mw what ROM you were flashing from?

Abducted23 said:
Yes i did. It could also find the system.img file, but just wasn't able to flash it.
Can you tell mw what ROM you were flashing from?
Click to expand...
Click to collapse
First I flashed crdroid. but did not like it. then I flashed blissrom using the same guide for crdroid. i just downloaded the rom posted on the guide. while for the bliss rom the arm64-bgN

Did you wipe data first before flashing?

Question Noob who bricked phone trying to root here. Need help.

I didn't know what I was doing and now I'm paying the price (tbf the guides I found weren't very beginner friendly).
I tried installing Magisk on my device. The guides online told me to use a .img file patched by the app and flash it. I did that and now I'm stuck in fastboot mode.
Sorry if I need stuff explained. A lot of this goes over my head and evidence shows that I'm dumb, so bare with me.

You don't flash the boot image or you risk a brick, use fastboot boot boot.img instead. When it boots, open Magisk and do the direct install.
To fix it you'll need to get a stock copy of your boot image and try flashing that or just use the MSM Tool for your device.

karmazogs said:
I didn't know what I was doing and now I'm paying the price (tbf the guides I found weren't very beginner friendly).
I tried installing Magisk on my device. The guides online told me to use a .img file patched by the app and flash it. I did that and now I'm stuck in fastboot mode.
Sorry if I need stuff explained. A lot of this goes over my head and evidence shows that I'm dumb, so bare with me.
Click to expand...
Click to collapse
Index of /list/Unbrick_Tools
You can also find the variant for your particular device and MSM the device back to stock. Easy to do. This is how a OnePlus tech remotely fixes a device without being sent in.

mattie_49 said:
Index of /list/Unbrick_Tools
You can also find the variant for your particular device and MSM the device back to stock. Easy to do. This is how a OnePlus tech remotely fixes a device without being sent in.
Click to expand...
Click to collapse
I have the MSM downloader but it says I need a username and password?
EDIT: Nevermind I figured it out.

What does EDL mode look like btw? Is it just a black screen or does it tell you?

karmazogs said:
What does EDL mode look like btw? Is it just a black screen or does it tell you?
Click to expand...
Click to collapse
It's a black screen.

Power off device. Hold vol +/- while inserting usb cable. Should be in EDL mode. PC will make a sound or MSM will say "connected".

First off you could always extract the ROM that you're using by downloading ROM and payload.bin dumper, extract pay load takes a long time please wait till the window closes by itself. Make sure your bootloader is unlocked.
reflash the boot.img over your device through fastboot mode with the extracted boot.img.
Make sure you open command prompt inside the folder that contains the fastboot files and adb files to run fastboot in command prompt. Connect your phone in fastboot mode.
/Fastboot flash boot boot.img
Boot.img has to be located within your fastboot files that you have downloaded. Or if you internally installed with platform-tools then use that specified folder and insert your boot.img there. If you do not command prompt won't be able to locate the file and will fail.
If it does not boot after successfully flashing stock boot.img you will have to follow a tutorial to use MSMtool for OnePlus 9. Depending on what firmware you need download appropriate files,. Make a space on your computer for your files because there will be a lot. Or you could also format data and see if that was the problem before considering MSM tool
You need the correct drivers for EDL mode to function correctly, you also may want to install OnePlus drivers from there website.,
For EDL mode to be detected with OnePlus 9 you must download a driver called
Qualcomm HS-USB QDloader 9008
Anymore questions feel free to PM me I may be able to help and same with some of the other guys on here that have also commented above.