" Fastboot flashing unlock_critical " failed - Xiaomi Mi A3 Questions & Answers

I couldn't unlock the bootloader_critical on my mi a3 phone, when I entered the command " Fastboot flashing unlock_critical"
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I thought so I couldn't install any room stock, it was always stuck in Fastboot when I rebooted. I flashed the rom via Twrp, OrangeFox but failed, could only install the MIUI rom.
Can anyone help me, I like the stock rom and want to use it. please.
My English is not good, I used google to help me

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Picture
https://photos.app.goo.gl/snH8FjKukY1YATPm6

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You don't have OEM unlock and usb debugging enabled?

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install twrp then flash the os

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I can't turn it on, can you help me?
garylawwd said:
You don't have OEM unlock and usb debugging enabled?
Click to expand...
Click to collapse
Picture : https://photos.app.goo.gl/ayb6ToJTzwryWc9R6

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ani_shawn said:
install twrp then flash the os
Click to expand...
Click to collapse
I installed twrp, but when I flashed the rom and rebooted, it always stuck in Fastboot

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Sangkunho93 said:
I installed twrp, but when I flashed the rom and rebooted, it always stuck in Fastboot
Click to expand...
Click to collapse
Okay so your bootloader is obviously unlocked already if you have twrp installed.
Why are you trying to use those commands again?
You just are not installing the ROMs correctly that's the problem. Follow the installation steps of the ROM you are trying to flash which will be found in the op of that ROM thread

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garylawwd said:
Okay so your bootloader is obviously unlocked already if you have twrp installed.
Why are you trying to use those commands again?
You just are not installing the ROMs correctly that's the problem. Follow the installation steps of the ROM you are trying to flash which will be found in the op of that ROM thread
Click to expand...
Click to collapse
" unlock bootloader critical failed ", I don't know if it's necessary?
-I followed the instructions to install the rom via twrp but it still failed, always stuck in Fastboot even though I changed the slot a / b

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Sangkunho93 said:
" unlock bootloader critical failed ", I don't know if it's necessary?
-I followed the instructions to install the rom via twrp but it still failed, always stuck in Fastboot even though I changed the slot a / b
Click to expand...
Click to collapse
You still didn't explain what exactly you did and what fails in twrp or what error you get or anything..
You already did the flashing unlock critical if you have twrp you don't need to keep doing it every time unless you relock your bootloader.
Start from the very start and tell us exactly step by step what you did.
How did you get miui if you didn't already do flashing unlock critical?

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garylawwd said:
You still didn't explain what exactly you did and what fails in twrp or what error you get or anything..
You already did the flashing unlock critical if you have twrp you don't need to keep doing it every time unless you relock your bootloader.
Start from the very start and tell us exactly step by step what you did.
How did you get miui if you didn't already do flashing unlock critical?
Click to expand...
Click to collapse
* This is what I did ( OEM, USB..: on) :
1. " fastboot flashing unlock " , ok
2. " fastboot flashing unlock_critical " , failed ( Picture : https://photos.app.goo.gl/74hv2ZyBRd9YVFGv7 )
3. "Fastboot set_active a (or b) " , ok
4. " Fastboot flash boot twrp.img " , ok
5. Fastboot reboot recovery
6. Flash rom :
- Rom MiUi, Stock : ok
- Rom Custom : Stuck in Fastboot, despite following the instructions
* * *
* OEM test: cannot turn on ( Picture : https://photos.app.goo.gl/uWXxK69zt7jEjPEw6 )
* I used to install PixelExperience rom successfully several times, but now I don't, it is always stuck in Fastboot
Where my problem is, I don't know. Can you help me. thank you. I use google to talk to you