Xiaomi 13 ultra bootloop

[vasastan]

Hello everyone,
I recently updated my Xiaomi 13 Ultra using fastboot mode. Since then, it's entered a reboot loop. As soon as it turns on, it briefly displays the TWRP home screen, then the screen goes black, and then it displays the TWRP home screen again, then the screen goes black again, and so on without stopping. I can't turn it off, I can't reboot it in recovery mode. I can only put it in fastboot mode. I tried completely flashing the smartphone by formatting it and reinstalling the system, but it's still stuck in its reboot loop. Can anyone help me, give me a procedure, or a tutorial to fix this problem?
Thanks in advance for your answers.

 

[vasastan]

Nobody can help me ?

 

[vasastan]

So, thank you for your many replies. I deduce that there is no solution and that my Xiaomi 13 Ultra is not repairable and that I will have to buy a new one.

 

[medmed58]

Put the phone in FASTBOOT mode
Even if it bootloops, I do the following:

I hold down the buttons : Volume Down + Power for 15 to 20 seconds, until the text FASTBOOT appears on the black screen.
Check the connection from my PC
In a terminal (PowerShell, CMD or Linux/macOS terminal) : fastboot devices
I need to see a line with an identifier (e.g. c1235684 fastboot). If not, there's a driver or cable problem.
Check the active slot
I type : fastboot getvar current-slot
Possible answer : current-slot: a
or : current-slot: b
Flash the correct TWRP.img in the correct location.
Example: I'm in location b, so I flash boot_b:
fastboot --set-active=b
fastboot flash boot_b twrp.img

 

[vasastan]

Thank you for your help. I downloaded the twrp-3.7.1_12-v9.0_A15-ishtas-skkk.img file and followed your instructions. The flashing was successful. When I press the power button, the phone reboots, it is no longer stuck in the reboot loop. However, I arrive directly in fastboot mode. What should I do next? I tried reinstalling the latest rom xiaomi.eu_ISHTAR_OS2.0.109.0.VMACNXM_15.zip. But the phone rebooted and started with its reboot loop again. please help me.

 

[vasastan]

Help me please. What should I do after following your instructions ?

 

[medmed58]

Which way did you choose to install the rom? TWRP or via ‘windows_install_and_format_data.bat’ in the rom?
From Windows?

 

[vasastan]

I installed the rom from the "windows_install_and_format_data.sh" file (because I'm on a mac).

 

[medmed58]

So why install TWRP? It is not necessary.
On which slot is the A/B installation?
It’s important to change the installation slot. If you flashed on slot A, activate slot B, and vice versa.
To find the active slot, use the following command:
fastboot getvar current-slot
Example of response: current-slot: a
To change the slot, use the following command:
fastboot --set-active=B
Then, run the script "windows_install_and_format_data.bat".

 

[vasastan]

Thanks for your help, but it didn't work. I flashed the smartphone via the macos_install_and_format_data.sh file. No error message, the flash was successful. But when the smartphone reboots, it enters its reboot loop again. I made a video of this reboot loop. How can I send it to you so you can see what's happening?

 

[vasastan]

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[vasastan]

You can see what's happening in the video above.

 

[medmed58]

Yes, I saw the video.
I'm asking if you didn't flash the rom on a slot, the TWRP on the slot ???
Which slot did you flash the Rom to?
Flash the TWRP on the same slot

 

[vasastan]

It still doesn't work. I flashed TWRP and the ROM to the same slot. The phone reboots and enters its reboot loop again (as in the video). I think I know what the problem is. After flashing, the phone reboots to slot a and not to slot b (where I flashed TWRP and the ROM). How can I make the phone reboot to slot b after flashing?

 

[medmed58]

You need to flash the rom image manually, specifying the correct slot, instead of letting the script do the rest

 

[vasastan]

OK. Mais comment on fait ? Pouvez-vous m'aider ?

 

[vasastan]

OK. But how do we do this? Can you help me?

 

[vasastan]

So I flashed the rom to slot b and managed to reboot to slot b. But nothing changes, as soon as the phone reboots, it goes back into its reboot loop. Is there a way to erase all partitions, all slots and then reinstall a new rom?

 

[medmed58]

I can give you a script, but without guarantee. I don't want to be responsible for any damage. Ok?

 

[vasastan]

It's OK. I'll try your script.

 

[NOSS8]

Try to flash a fastboot rom with Miflash without relocking the bootloader.

 

[medmed58]

@NOSS8 is right, start by trying to flash with Miflash.
I don't have a xiaomi 13 ultra, so this script is blind.
It's the same script as for the Mac with the addition of the choice of slot (a or b) for the flash.
Here is the file at your own risk :

 

[vasastan]

Thank you for your responses. Excuse me but I don't see the file. Where is it ?

 

[NOSS8]

Mac:
Do not use Miflash, but the file "flash_all.sh" included in the extracted folder of the fastboot ROM.
Fastboot rom:

https://hyperos.fans/en/devices/ishtar/

 

[medmed58]

The file won't play. I've changed the extension. Rename the file with the correct extension (.sh instead of .zip)