Develop Bugs

UNLOCKING Bootloader of Mi MAX

I am trying to Unlock bootloader of My Mi Max from last 4 days but always getting an error "Couldn't Verify Device" and on.
First : I want to root my phone as soon as possible and clear this Mi Junk but after watching this drama I am losing my Patient.
Second : any other alternative for Unlocking bootloader for Mi MAX.
If anybody has unlocked there Mi Max with Mi Unlock with there MI ID without any error??
Please Help!
UPDATE:
Bootloader was unlocked using Official method, Thanks @nijel8 and @avi3230 for Replying!

Make sure you are on official miui and on some fake vendor rom. China dev is preferred but not necessary...

Just visit this thread.
No need of unlocked bootloader for rooting.

nijel8 said:
Make sure you are on official miui and on some fake vendor rom. China dev is preferred but not necessary...
Click to expand...
Click to collapse
In India you get Official Mi devices with there Stable Miui 8 ROM

jordann_f1 said:
In India you get Official Mi devices with there Stable Miui 8 ROM
Click to expand...
Click to collapse
Good. Now make sure you geet rid of miui...

I am having issues with my mi max (Hydrogen) i have been granted unlocking rights, but the unlock tool alway states my mi device isnt supported??
Initially, i had a few issues with drivers on Windows 10, but i have patlrtially sorted this. And i can now connect with MTP, But i still can't unlock or connect to the Mi Pc suite?
Any help with this would be welcomed.
T.I.A.

I had the same trouble, just look up your windows device manager. Mi Max should be recognized as "Android ADB Interface" while running fastboot mode.
The second problem can be with Xiaomi services. If you still getting verify error, try to use some of their services, like cloud, theme shop etc and than try again to unlock.
I was unlocking my hydrogen on global stable 8.0.1.0 successfully.
PS: the phone goes into recovery 30 seconds in total. On my previous XRN2 it was something like promptly.

I recomend you update to the latest Stable Official Miui Rom before trying to unlock bootloader, and you will find a new option in developer options near to the "Enable Unlock OEM" to asociate your Mi account, now you won't get the "50% error" anymore.

I have finally unlocked the bootloader tonight I signed into the mi unlock tool, with my mi max connected as normal. (not in fastboot mode) After clicking sign in, i got a message to turn off and do the normal vol- and power to enter fastboot mode. I then got the unlock prompt which i was waiting so long for. In the MI forums, they are all saying enter fasboot mode first before connecting to the unlock tool, but i did it after connecting just normally., Hope this helps anyone that is having the same issues connecting.
Still can't sign into my Mi Pc suite though? Device manager is stating in portable devices that MI MAX is connected, but has i yellow triangle! when i enable usb debugging, i get a prompt from pc suite to "connect my device via usb" but im clearly connected? when usb debug is off, i get no prompt from pc suite.
After i right click to update drivers on MI MAX in device manager, i get a massage from windows that " A service installation section in this INF is invalid" and from PCsuite stating "looks like your missing some drivers" Really??
I have tried updating with different ways in device manager, but i get the same results, connected to windows, but no connection to Pc suite which i need for backing up my files before flashing
Any help with this is very welcomed.
T.I.A

It's a known official fact straight from Xiaomi PC sh*t don't support anything after Android 5.x. Quick search would've saved you time and troubles...

Well i didnt know that so i wouldn't have searched for that info, but thanx for letting me know anyway.

nijel8 said:
It's a known official fact straight from Xiaomi PC sh*t don't support anything after Android 5.x. Quick search would've saved you time and troubles...
Click to expand...
Click to collapse
Thanks for sharing. Same issue here.

Mi5s Plus bootloader unlock problem

Wondering if anyone is able to help me.
Recently purchased a MI5S Plus and having problems unlocking the bootloader. Followed all instructions and the unlock fails at 50% with the tool stating that "the account on the device is different than current account" (or something like that).
Now here's what I have done so far:
-made sure device and tool are using the same account with phone number login
-made sure "find device" is turned on and phone can be found
-disabled windows 10 driver signature
-enabled usb debugging on the device
-made sure sim card is in slot 1 of device
So far no dice. Phone is on Global Stable (8.0.1.0) but I wanted to move to EU version (which also has the correct UK locale and some other features). I am not new to the rom flashing scene (just moved from iOS to android and had a Galaxy S2 back in the day).
If anyone could help me with this it would be greatly appreciated. No idea what else to try.
Best regards

Try to use vpn i use hot spot shield..
Sent from my MI 5s using Tapatalk

kojoti75 said:
Try to use vpn i use hot spot shield..
Click to expand...
Click to collapse
How would a vpn work in this situation?

I am not sure but i saw that on youtube and i unlock both mi5s and mi5s plus without issues...
Sent from my MI 5s using Tapatalk

kojoti75 said:
I am not sure but i saw that on youtube and i unlock both mi5s and mi5s plus without issues...
Click to expand...
Click to collapse
I'll check it out. If it helps I'm willing to try it. What location did you use?

I didn't change anything just use it by default...
Sent from my MI 5s using Tapatalk

M3th0s said:
I'll check it out. If it helps I'm willing to try it. What location did you use?
Click to expand...
Click to collapse
I think what this means is that your phone is associated to a mi account different than the one you have logged in to unlock it. Make sure your phone has the same mi account as the one you are using to unlock it.
Good luck!!

jimmyss04 said:
I think what this means is that your phone is associated to a mi account different than the one you have logged in to unlock it. Make sure your phone has the same mi account as the one you are using to unlock it.
Good luck!!
Click to expand...
Click to collapse
Yes it's the same account in both places. I double checked that.
Sent from my MI 5s Plus using Tapatalk

Hi, I will share some of my experience.
Myself had that problem too, bought mi5s plus on global 8.x.x and wanted to move to eu version . The problem with this phone is that there's no global dev rom for it just yet, and you can't officially flash the china dev rom, since the installer doesn't recognize the package. So you find yourself in kind of loop, like
==> to open bootloader you need dev rom (only china available) :/
==> to flash china dev rom via mi flash you need to get your phone to EDM ( Emergency Download Mode ) .
But to get to EDM you need open bootloader.
That's kinda sucks, but i kept looking over the internet and found the overall solution that will probably work on any xiaomi device. And that's to make "Deep flash cable". This cable let's you enter EDM ignoring the locked bootloader, this way you can flash the china dev rom, and from there open the bootloader.
The idea is really simple, just need to shortcut any of the middle connectors of the usb with the ground(the outter connector) when plugging the phone into the pc(don't even need to cut the original usb cable), that will prevent the phone from starting to charge and it will enter EDM (pure black screen without any sign of life, but pc will recognize it on COM port as long as you have qualcomm drivers installed.) In this mode the mi flash tool will recognize the phone and you can flash the china dev rom.
If you need more help just ask, and u can find some nice guides on youtube that explain how to make the cable. Good luck!

makslll said:
Hi, I will share some of my experience.
Myself had that problem too, bought mi5s plus on global 8.x.x and wanted to move to eu version . The problem with this phone is that there's no global dev rom for it just yet, and you can't officially flash the china dev rom, since the installer doesn't recognize the package. So you find yourself in kind of loop, like
==> to open bootloader you need dev rom (only china available) :/
==> to flash china dev rom via mi flash you need to get your phone to EDM ( Emergency Download Mode ) .
But to get to EDM you need open bootloader.
That's kinda sucks, but i kept looking over the internet and found the overall solution that will probably work on any xiaomi device. And that's to make "Deep flash cable". This cable let's you enter EDM ignoring the locked bootloader, this way you can flash the china dev rom, and from there open the bootloader.
The idea is really simple, just need to shortcut any of the middle connectors of the usb with the ground(the outter connector) when plugging the phone into the pc(don't even need to cut the original usb cable), that will prevent the phone from starting to charge and it will enter EDM (pure black screen without any sign of life, but pc will recognize it on COM port as long as you have qualcomm drivers installed.) In this mode the mi flash tool will recognize the phone and you can flash the china dev rom.
If you need more help just ask, and u can find some nice guides on youtube that explain how to make the cable. Good luck!
Click to expand...
Click to collapse
Ah damn. Hardware route is gonna be a problem. So why are some people have to unlock the bootloader on global stable and some are not?
Sent from my MI 5s Plus using Tapatalk

makslll said:
Hi, I will share some of my experience.
Myself had that problem too, bought mi5s plus on global 8.x.x and wanted to move to eu version . The problem with this phone is that there's no global dev rom for it just yet, and you can't officially flash the china dev rom, since the installer doesn't recognize the package. So you find yourself in kind of loop, like
==> to open bootloader you need dev rom (only china available) :/
==> to flash china dev rom via mi flash you need to get your phone to EDM ( Emergency Download Mode ) .
But to get to EDM you need open bootloader.
That's kinda sucks, but i kept looking over the internet and found the overall solution that will probably work on any xiaomi device. And that's to make "Deep flash cable". This cable let's you enter EDM ignoring the locked bootloader, this way you can flash the china dev rom, and from there open the bootloader.
The idea is really simple, just need to shortcut any of the middle connectors of the usb with the ground(the outter connector) when plugging the phone into the pc(don't even need to cut the original usb cable), that will prevent the phone from starting to charge and it will enter EDM (pure black screen without any sign of life, but pc will recognize it on COM port as long as you have qualcomm drivers installed.) In this mode the mi flash tool will recognize the phone and you can flash the china dev rom.
If you need more help just ask, and u can find some nice guides on youtube that explain how to make the cable. Good luck!
Click to expand...
Click to collapse
Thanks makslll, I have mi5s, wondering if the process is different?
I bought my phone with the xiaomi.eu rom (8.0.10.0 MAGCNDH), unlocked bootloader with "MiFlashUnlock_1.1.0317.1_en" and installed recovery following this (https://xiaomi.eu/community/threads/6-12-1.36462/). After this I was able to install other ROMs .
Hope this helps

jimmyss04 said:
Thanks makslll, I have mi5s, wondering if the process is different?
I bought my phone with the xiaomi.eu rom (8.0.10.0 MAGCNDH), unlocked bootloader with "MiFlashUnlock_1.1.0317.1_en" and installed recovery following this (https://xiaomi.eu/community/threads/6-12-1.36462/). After this I was able to install other ROMs .
Hope this helps
Click to expand...
Click to collapse
Main problem I'm getting at the moment is the fact I can't get past the 50% on the unlock process. Keeps giving me an account error on the Mi Flash unlock tool. Something like "Account on the device is different from current account".
In any case I was looking at this EDL solution but let me see if I grasped this:
-I can use EDL to bypass locked bootloader restrictions. Could I just flash the EU rom without unlocking the bootloader?
-That not being the case, I'm guessing I would need to flash something like China Dev and the try and unlock the bootloader followed by TWRP flash, etc etc.
If someone could shed any light on this that would be great.
Thanks in advance

M3th0s said:
Main problem I'm getting at the moment is the fact I can't get past the 50% on the unlock process. Keeps giving me an account error on the Mi Flash unlock tool. Something like "Account on the device is different from current account".
In any case I was looking at this EDL solution but let me see if I grasped this:
-I can use EDL to bypass locked bootloader restrictions. Could I just flash the EU rom without unlocking the bootloader?
-That not being the case, I'm guessing I would need to flash something like China Dev and the try and unlock the bootloader followed by TWRP flash, etc etc.
If someone could shed any light on this that would be great.
Thanks in advance
Click to expand...
Click to collapse
I don't know about that process, but I think this post might help even if it is for another Xiaomi device, please let me know how it goes:
http://en.miui.com/thread-226193-1-1.html

jimmyss04 said:
I don't know about that process, but I think this post might help even if it is for another Xiaomi device, please let me know how it goes:
http://en.miui.com/thread-226193-1-1.html
Click to expand...
Click to collapse
Thanks will give this a bash later on after first trying to factory reset the phone.
Thing is I read about a lot of people being successful unlocking their bootloader on Global Stable rom, so no idea why I can't do it. Pretty sure I have all the necessary drivers and I'm following the process as it should. Still getting the account error.
Xiaomi should sort their **** out...
Thanks everyone for your help!

M3th0s said:
Main problem I'm getting at the moment is the fact I can't get past the 50% on the unlock process. Keeps giving me an account error on the Mi Flash unlock tool. Something like "Account on the device is different from current account".
In any case I was looking at this EDL solution but let me see if I grasped this:
-I can use EDL to bypass locked bootloader restrictions. Could I just flash the EU rom without unlocking the bootloader?
-That not being the case, I'm guessing I would need to flash something like China Dev and the try and unlock the bootloader followed by TWRP flash, etc etc.
If someone could shed any light on this that would be great.
Thanks in advance
Click to expand...
Click to collapse
You can't flash Eu ROM with locked bootloader, since you need to use special image files of the supported roms for miflash (Can't use the .zip roms that we flash via recovery), and those available only for the official roms ( global stable, china stable, china dev).
So yeah, unfortunally this would take little longer, but i can assure you this method 100% works and it's not very hard once you've done the tricky thing with the deep flash cable =)

makslll said:
You can't flash Eu ROM with locked bootloader, since you need to use special image files of the supported roms for miflash (Can't use the .zip roms that we flash via recovery), and those available only for the official roms ( global stable, china stable, china dev).
So yeah, unfortunally this would take little longer, but i can assure you this method 100% works and it's not very hard once you've done the tricky thing with the deep flash cable =)
Click to expand...
Click to collapse
I will probably grab a cable from Aliexpress. Reviews seem to be ok:
https://www.aliexpress.com/item/2016new-deep-flash-cable-for-xiaomi-phone-models-Open-port-9008-Supports-all-BL-locks-Engineering/32707713158.html?spm=2114.01010208.3.1.rXgJsN&ws_ab_test=searchweb0_0,searchweb201602_6_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10054_10059_10099_10078_10079_426_10073_10103_10102_10096_10052_10050_10051,searchweb201603_6&btsid=dde7663f-24a9-4717-94c5-de541dcce370
Will let you know when it arrives and if it works.
On another note, if a Global Dev rom is released for the Mi5S Plus, are you able to flash it as normal through the updater app?
Best regards

M3th0s said:
I will probably grab a cable from Aliexpress. Reviews seem to be ok:
https://www.aliexpress.com/item/2016new-deep-flash-cable-for-xiaomi-phone-models-Open-port-9008-Supports-all-BL-locks-Engineering/32707713158.html?spm=2114.01010208.3.1.rXgJsN&ws_ab_test=searchweb0_0,searchweb201602_6_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10054_10059_10099_10078_10079_426_10073_10103_10102_10096_10052_10050_10051,searchweb201603_6&btsid=dde7663f-24a9-4717-94c5-de541dcce370
Will let you know when it arrives and if it works.
On another note, if a Global Dev rom is released for the Mi5S Plus, are you able to flash it as normal through the updater app?
Best regards
Click to expand...
Click to collapse
Sounds interesting

M3th0s said:
I will probably grab a cable from Aliexpress. Reviews seem to be ok:
https://www.aliexpress.com/item/2016new-deep-flash-cable-for-xiaomi-phone-models-Open-port-9008-Supports-all-BL-locks-Engineering/32707713158.html?spm=2114.01010208.3.1.rXgJsN&ws_ab_test=searchweb0_0,searchweb201602_6_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10054_10059_10099_10078_10079_426_10073_10103_10102_10096_10052_10050_10051,searchweb201603_6&btsid=dde7663f-24a9-4717-94c5-de541dcce370
Will let you know when it arrives and if it works.
On another note, if a Global Dev rom is released for the Mi5S Plus, are you able to flash it as normal through the updater app?
Best regards
Click to expand...
Click to collapse
Yes, on my gf's mi5 i just flashed global dev rom from the updater and unlocked it easy, they really should just remove the global <==> china barrier

Update: there is official Global Dev ROM available now, so no "deep flash cable" is needed anymore, just download the ROM, copy it to phone memory, and flash it via updater, good luck =)

So, quick update.
Managed to unlock bootloader last night by updating to the new Global Dev for the Mi5S Plus.
However a new problem has arisen, as usual. Using ADB, it recognises the phone whilst in normal mode with USB debugging on. The moment I reboot it into fastboot mode (to flash TWRP), it doesn't recognise it anymore. The drivers are installed as I disabled windows driver signature verification, but the phone is just not recognised anymore.
Anyone have any idea how to fix this?
Thanks in advance.

Can anyone help me? Mi Max 3 can't be booted nor flashed anymore..

Hi I have a big problem with my Max 3.
I ulocked it and then I flashed it with the official Xiaomi Flash App and clicked the 'clean all and lock' button. Unfortunally I flashed a bad ROM.
Now I can only boot to recovery (This MIUI version can't be installed on this device) and Fastboot.
If I try to flash a ROM I see 'Erase not allowed in lock state'. I tried to unlock it with fastboot, I receive 'Token verify failed' I tried with Mi Unlock: My account is accepted and when I click Unlock
I have 'Current account is not bound to this device' But I can't bound it because i can't boot it!!
I would be very, very happy about a solution for this mess!!!
Thanks everyone who has i idea!

Use MiFlash tool, flash the fastboot version of latest global stable or beta rom on: https://forum.xda-developers.com/mi-max-3/how-to/rom-official-recovery-fastboot-roms-mi-t3827503

dinhvtai said:
Use MiFlash tool, flash the fastboot version of latest global stable or beta rom on: https://forum.xda-developers.com/mi-max-3/how-to/rom-official-recovery-fastboot-roms-mi-t3827503
Click to expand...
Click to collapse
He already tried that. You can't use MiFlash with locked bootloader.
I am afraid you have bricked your phone. Unless you have an official Xiaomi servicecentre nearby.

mierlo420 said:
He already tried that. You can't use MiFlash with locked bootloader.
Click to expand...
Click to collapse
Are you sure?

I had exactly the same. Locked my device when flashing (!!!?) then error while flashing, format the phone and everything was gone, locked bootloader.
After a search of 2 months I found out it was possible to repair the phone.
You have to open your phone, not very hard..follow this video https://youtu.be/dYlKG3EcpHg
Then contact the guys from S-Unlock https://s-unlock.com. I did it too, and they are thrustworthy.
You have to test point your device, https://youtu.be/IYWItgq2f9E until the Quallcom driver appears in your devicelist.
Then contact S-Unlock via chat. It can take up to 2 hours before the respond. The service cost 25 dollar for installing new Rom.
They log in to your computer via Teamviewer, they install MiFlash and Rom.
They have a special restore account. Without this account your Max will never work again, no need to try.
For 25 dollar my Max3 is working again.

Bootloop and unable to reflash stock ROM

Hello,
I have a Redmi Note 8 pro (China version). I unlocked the bootloader and flashed the Global ROM. Unfortunately, the phone didn't reboot and it is now stuck with message "this ROM can't be installed on this device".
I realized afterwards that many other users had the same problem. Now it is impossible to flash the chinese Rom again (I get the CRCLIST flash error).
I believe my only option now is to re-flash the China stock ROM using the EDL method and an authorized Xiaomi Account. Can anyone help me do that?
If anybody has other suggestions, that would be really helpul.

You may flashed lower version of miui. If you can enter into fastboot mode, flash with latest China miui, then install TWRP, then use TWRP to flash global rom. I used twrp here and it works for my china phone, now im on global rom.

Just my 2 cents:
1. Always flash stock ROM via fastboot. ALWAYS use option "clean all". NEVER use option "clean all and lock"
2. Make sure the ROM's folder path is not containing space characters. Several stupid errors can come from this.
Ex: C:/this_is_the_rom_path
3. Use USB2.0 port from your PC. Better plug the device into USB2.0 rear port.
I couldn't make any of my USB front ports to work. Only the USB2.0 rear port.

MarkLev said:
Just my 2 cents:
1. Always flash stock ROM via fastboot. ALWAYS use option "clean all". NEVER use option "clean all and lock"
Click to expand...
Click to collapse
Unfortunately I believe that's precisely the mistake I made... Now the bootloader is locked again and I cannot unlock another time because I have no access to the phone. Mi Unlock Tool says "please add your account in developer options > Mi Unlock Status".

What happens next then?

petenoni said:
What happens next then?
Click to expand...
Click to collapse
Nothing, I cannot unlock the bootloader, cannot flash anything, and cannot boot the phone. I'm stuck here :/

idog8818 said:
You may flashed lower version of miui. If you can enter into fastboot mode, flash with latest China miui, then install TWRP, then use TWRP to flash global rom. I used twrp here and it works for my china phone, now im on global rom.
Click to expand...
Click to collapse
Thanks for the advice. Unfortunately, I believe the bootloader is locked again now. I can put the phone in fastboot mode, but I cannot flash anything (not allowed in locked state).
If anyone knows how to flash with EDL method... But of course we would need an authorized account to do that.

laxsmi said:
Thanks for the advice. Unfortunately, I believe the bootloader is locked again now. I can put the phone in fastboot mode, but I cannot flash anything (not allowed in locked state).
If anyone knows how to flash with EDL method... But of course we would need an authorized account to do that.
Click to expand...
Click to collapse
You have to wait untill "lock timer" expires , unlock BL again and flash stock ...

zOOk1981 said:
You have to wait untill "lock timer" expires , unlock BL again and flash stock ...
Click to expand...
Click to collapse
That's not possible, the phone has no Mi account attached to it... And how can I add an account to the phone when it doesn't boot?
laxsmi said:
Now the bootloader is locked again and I cannot unlock another time because I have no access to the phone. Mi Unlock Tool says "please add your account in developer options > Mi Unlock Status".
Click to expand...
Click to collapse

laxsmi said:
That's not possible, the phone has no Mi account attached to it... And how can I add an account to the phone when it doesn't boot?
Click to expand...
Click to collapse
I remember mi unlock tool will work in fastboot mode. I recommend you to use mi unlock tool which you used first time to try in fastboot mode. It may say: you need to wait xxx hours, then you have to wait. Or it may unlock directly like first time. Since you unlocked first time, it will be bounded into your Mi account already.
If you have fastboot mode available, do NOT too worried, more likely to you have it back. using SP Flash tool with paid auth account is last step.

Could you fix it?

Question Bootloop to fastboot logo and back in lock state

Hi everybody,
yesterday I tried flashing the stock pocof3 rom back onto my phone, but since it got stuck in a bootloop at the fastboot logo. Showing the poco logo for a milisecond and then straight to fastboot..
(before this I flashed twrp and the arrowOS recovery and images a few time trying, without succes, to install this rom)
Last thing I did was flash via the mi-flash tool and did't see the "clean and lock" selection so it's also in lock state again.
I cant get adb to find the phone although the mi-flashtool is finding it.
anyone any tips?
I tried the vol up power trick, but this didn't help, keeps loading into fastboot

Did Mi Flash give an error message after trying to flash?

dreamytom said:
Did Mi Flash give an error message after trying to flash?
Click to expand...
Click to collapse
I dont recall giving an error, so i dont think so
now it is though, when trying to flash the firmware. error erasing boot_ab (failed: erase not allowed in lock state)

Kaayman said:
I dont recall giving an error, so i dont think so
now it is though, when trying to flash the firmware. error erasing boot_ab (failed: erase not allowed in lock state)
Click to expand...
Click to collapse
I'm not sure, but you may still be able to flash official ROMs.
But in "Configuration" make sure Erase is disabled

Kaayman said:
I dont recall giving an error, so i dont think so
now it is though, when trying to flash the firmware. error erasing boot_ab (failed: erase not allowed in lock state)
Click to expand...
Click to collapse
BAD NEWS... your Poco is bricked. You cannot flash ANYTHING using a PC when your bootloader is locked.
(I did same thing on a Mi11 5g last week and ended up selling it on eBay for spare & repairs
I tried sideload flash, miflash, copying update.zip to internal storage via ADB, and many other options - all without success).
- if your POCO is under warranty in your country (i.e. not a chinese import)... contact Xiaomi Support they can re-flash correct ROM
- Ask your local phone repair store... they *might* be able to flash original ROM back by using "Chimera" engineering software.

dreamytom said:
I'm not sure, but you may still be able to flash official ROMs.
But in "Configuration" make sure Erase is disabled
Click to expand...
Click to collapse
this doesn't seem to be an option. there is a checkbox with "erase all" but all are already unchecked

dezborders said:
BAD NEWS... your Poco is bricked. You cannot flash ANYTHING using a PC when your bootloader is locked.
(I did same thing on a Mi11 5g last week and ended up selling it on eBay for spare & repairs
I tried sideload flash, miflash, copying update.zip to internal storage via ADB, and many other options - all without success).
- if your POCO is under warranty in your country (i.e. not a chinese import)... contact Xiaomi Support they can re-flash correct ROM
- Ask your local phone repair store... they *might* be able to flash original ROM back by using "Chimera" engineering software.
Click to expand...
Click to collapse
This is what I feared already..

Kaayman said:
This is what I feared already..
Click to expand...
Click to collapse
- Bootloader was re-locked whilst a custom ROM was in the phone.
(MIUI with Locked bootloader will not boot up where ROM is not stock or does not match the region/product code).
You cannot apply for bootoader unlock because you cannot boot up into Android and request the unlock via Developer mode.
You cannot remotely (via PC cable) flash any ROM into a Xiaomi / POCO phone whilst botloader is locked.
You are in a chicken and egg situation.,,, but if you find a way to repair your phone, please let us know how you achieved it.
Good luck!

If the system hasn't booted up yet there is a chance that you will be able to unlock bootloader again. Try it.

mar.ur said:
If the system hasn't booted up yet there is a chance that you will be able to unlock bootloader again. Try it.
Click to expand...
Click to collapse
That's what I'm thinking too ...
Connect the phone to pc and do the bootloader unlock again via the mi unlock app - you don't need to apply again and stuff as long as you're able to recognise the phone inside app correctly

Rstment ^m^ said:
That's what I'm thinking too ...
Connect the phone to pc and do the bootloader unlock again via the mi unlock app - you don't need to apply again and stuff as long as you're able to recognise the phone inside app correctly
Click to expand...
Click to collapse
thanks everyone for all the replies!
tried unlocking it via the mi unlock tool (latest) but it says (in chinese) its locked by nr 123***456 by searching the phone - can't unlock
edit:
google lens translates:
X The phone has been locked by the account number 661****647 by searching the phone, Can't unlock
but it's not the nr. of my account..

dezborders said:
- Bootloader was re-locked whilst a custom ROM was in the phone.
(MIUI with Locked bootloader will not boot up where ROM is not stock or does not match the region/product code).
You cannot apply for bootoader unlock because you cannot boot up into Android and request the unlock via Developer mode.
You cannot remotely (via PC cable) flash any ROM into a Xiaomi / POCO phone whilst botloader is locked.
You are in a chicken and egg situation.,,, but if you find a way to repair your phone, please let us know how you achieved it.
Good luck!
Click to expand...
Click to collapse
Is it not even possible to flash Official ROMs?
Isn't there like a system that it checks the signature of the ROM and if it's a signed ROM it allows the flash? Or am I mistaken?

dreamytom said:
Is it not even possible to flash Official ROMs?
Isn't there like a system that it checks the signature of the ROM and if it's a signed ROM it allows the flash? Or am I mistaken?
Click to expand...
Click to collapse
Nope bootload locked = no 'remote' flashes via pc
Apparently there is an 'authenticated user' mode for Xiaomi engineers in MiFlaah and also an EDL Emergency Download Mode which you can trigger by shorting out 2 pins on the motherboard so bypass bootloader lock and flash any ROM
Neither were available options for me

dezborders said:
Nope bootload locked = no 'remote' flashes via pc
Apparently there is an 'authenticated user' mode for Xiaomi engineers in MiFlaah and also an EDL Emergency Download Mode which you can trigger by shorting out 2 pins on the motherboard so bypass bootloader lock and flash any ROM
Neither were available options for me
Click to expand...
Click to collapse
I also tried to simulate a local OTA by copying update.zip to internal storage using ADB push command and booting into recovery mode to flash ... But it doesn't work for me

dezborders said:
Nope bootload locked = no 'remote' flashes via pc
Apparently there is an 'authenticated user' mode for Xiaomi engineers in MiFlaah and also an EDL Emergency Download Mode which you can trigger by shorting out 2 pins on the motherboard so bypass bootloader lock and flash any ROM
Neither were available options for me
Click to expand...
Click to collapse
I'm now in the procedure to sent it back under warranty. any idea if this is possible and what the cost would be if not under warranty?
If all fails i'll try the shorting by pins, should be interesting

I think a warranty repair claim is your best bet ... I have never read anywhere that unlocking bootloader invalidates Xiaomi warranty (Unlike Samsung and so many other brands!)
If warranty repair is re refused try a few independent repair shops
Last resort is get the back cover off the phone and short out the EDL pins
Good luck!
Let us know if you manage to get your phone booting up again

See this thread (last post) for a possible workaround via a 3rd party recovery image to flash EU rom
[Solved] Stuck in fastboot with locked bootloader
HI there! After multiple problems with the custom ROMs I tested, I finally decided to go back to the stock ROM by downloading it from the official thread. I extracted the .tgz archive, run the "flash_all.bat" program, which failed by saying it...
forum.xda-developers.com

Kaayman said:
I'm now in the procedure to sent it back under warranty. any idea if this is possible and what the cost would be if not under warranty?
If all fails i'll try the shorting by pins, should be interesting
Click to expand...
Click to collapse
I once hardbricked (complete blackscreen, not even Fastboot reachable) a Poco F3.
I requested a replacement from Amazon and that worked.
I said a software update bricked it.
Of course having to do that is really bad, but I was scared of opening the back.

dezborders said:
See this thread (last post) for a possible workaround via a 3rd party recovery image to flash EU rom
Bootloop to fastboot logo and back in lock state
Hi everybody, yesterday I tried flashing the stock pocof3 rom back onto my phone, but since it got stuck in a bootloop at the fastboot logo. Showing the poco logo for a milisecond and then straight to fastboot.. (before this I flashed twrp and...
forum.xda-developers.com
Click to expand...
Click to collapse
You pasted the current thread, do you have the link to the thread you meant?

Kaayman said:
You pasted the current thread, do you have the link to the thread you meant?
Click to expand...
Click to collapse