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Phone not starting after locking bootlocker

Hi,
I desperately need help. I have a Xiaomi Mi5. My problem is the following. I have previously unlocked the bootloader using the code sent by Miui and have installed Lineage OS on my phone, which worked perfectly. The other day I had an idea that locking the bootloader would allow me to use Android Pay apps (currently not allowed with an unlocked bootloader) so I used the commands:
fastboot oem lock,
fastboot flashing lock,
fastboot oem relock,
As a result, my device is now locked but it won't start. I do realise that I need to reflash the ROM but I cannot unlock the phone. As I cannot start the phone I also cannot access the developer setttings in the phone and therefore I cannot put it in debugging mode.
The device is recognised when it's in fastboot mode and when I use adb command: fastboot oem unlock, I get the response "token verification failed". I have also tried to flahs the TWRP.img but I get the same message that the phone is locked. I have tried to use the Miflash unlock tool again but when I try to sign in I get "network error". I have seen somewhere in the forum that it's because the MI account no longer recognises my phone (as it now only has Lineage installed).
Can anyone help?

With miflash try to flash a china developer, then unlock bootloader, and finally flash twrp
Inviato dal mio MI 5 utilizzando Tapatalk

Laverick74 said:
With miflash try to flash a china developer, then unlock bootloader, and finally flash twrp
Inviato dal mio MI 5 utilizzando Tapatalk
Click to expand...
Click to collapse
Thanks, I tried this but I get the same response: FAILED (the device is locked)

Try updating via Mi Suit.

http://en.miui.com/thread-279195-1-1.html
Warning: Pls don't attempt to lock your bootloaders with TWRP or any custom recovery's installed. It might just result in an unrecovereable hard brick. Bootloaders should always be locked with stock recoveries.

SwedieK said:
Hi,
I desperately need help. I have a Xiaomi Mi5. My problem is the following. I have previously unlocked the bootloader using the code sent by Miui and have installed Lineage OS on my phone, which worked perfectly. The other day I had an idea that locking the bootloader would allow me to use Android Pay apps (currently not allowed with an unlocked bootloader) so I used the commands:
fastboot oem lock,
fastboot flashing lock,
fastboot oem relock,
As a result, my device is now locked but it won't start. I do realise that I need to reflash the ROM but I cannot unlock the phone. As I cannot start the phone I also cannot access the developer setttings in the phone and therefore I cannot put it in debugging mode.
The device is recognised when it's in fastboot mode and when I use adb command: fastboot oem unlock, I get the response "token verification failed". I have also tried to flahs the TWRP.img but I get the same message that the phone is locked. I have tried to use the Miflash unlock tool again but when I try to sign in I get "network error". I have seen somewhere in the forum that it's because the MI account no longer recognises my phone (as it now only has Lineage installed).
Can anyone help?
Click to expand...
Click to collapse
This might help you. http://en.miui.com/thread-299790-1-1.html
Good luck.

Flash Official ROM A2

Hello all!
I recently bought a second hand Xiaomi MI A2 online however I found a problem.
The previous owner did a factory reset on it but I'm stuck in the initial set up configuration because it asks me for the google account credentials attached to the phone. I texted the previous owner but had no answer.
So I tried to flash the official ROM to bypass the issue but I get an error message from Xiaomi Flash Tool saying "remote: Flash is not allowed in Lock State".
I think this is happening for one of the following reasons:
The previous owner didn't enable USB Debugging (thing I can't do because I'm stuck in the set up configuration)
The bootloader is locked (and I can't unlock it because I don't have the credentials of the attached account)
Does anyone knows how can I solve this problem?
Thank you for your attention

Joaosacramento said:
Hello all!
I recently bought a second hand Xiaomi MI A2 online however I found a problem.
The previous owner did a factory reset on it but I'm stuck in the initial set up configuration because it asks me for the google account credentials attached to the phone. I texted the previous owner but had no answer.
So I tried to flash the official ROM to bypass the issue but I get an error message from Xiaomi Flash Tool saying "remote: Flash is not allowed in Lock State".
I think this is happening for one of the following reasons:
The previous owner didn't enable USB Debugging (thing I can't do because I'm stuck in the set up configuration)
The bootloader is locked (and I can't unlock it because I don't have the credentials of the attached account)
Does anyone knows how can I solve this problem?
Thank you for your attention
Click to expand...
Click to collapse
Maybe you can see/ask in this thread for mia2 toolkit (I'm not sure but you can ask there )
https://forum.xda-developers.com/mi-a2/how-to/mi-a2-toolkit-unlock-bootloader-root-t3834585

daitalos said:
Maybe you can see/ask in this thread for mia2 toolkit (I'm not sure but you can ask there )
https://forum.xda-developers.com/mi-a2/how-to/mi-a2-toolkit-unlock-bootloader-root-t3834585
Click to expand...
Click to collapse
Thank you, will give it a try!
EDIT: Not working, every time I try to execute the unlock I got an error message "remote: Flashing Unlock is not allowed"

Joaosacramento said:
Thank you, will give it a try!
EDIT: Not working, every time I try to execute the unlock I got an error message "remote: Flashing Unlock is not allowed"
Click to expand...
Click to collapse
(yes...normally, first you must enable "OEM unlocking" from developer option
_ https://forum.xda-developers.com/mi-a2/how-to/guide-how-to-unlock-bootloader-xiaomi-t3831484
__but first for your problem with locked device, see here for FRP apk : https://www.google.gr/search?q=com.....69i57j0l5.14869j0j8&sourceid=chrome&ie=UTF-8
__and here frp mia2 : https://www.google.gr/search?q=frp+.....69i57j0l3.7035j0j8&sourceid=chrome&ie=UTF-8
first "unlock" your device & then you can unlock bootloader easy ....
sry for english

Just unlock bootloader(critical too) and use miflash

I also have a Mi A2 stuck in android logo screen can't can't boot into device developer options to unlock bootloader.
Fastboot oem unlock give me error flashing is not allowed.
Is there anyway around this?

You need to do an unlock of critical partitions - "fastboot flashing unlock_critical"

daitalos said:
(yes...normally, first you must enable "OEM unlocking" from developer option
_ https://forum.xda-developers.com/mi-a2/how-to/guide-how-to-unlock-bootloader-xiaomi-t3831484
__but first for your problem with locked device, see here for FRP apk : https://www.google.gr/search?q=com.....69i57j0l5.14869j0j8&sourceid=chrome&ie=UTF-8
__and here frp mia2 : https://www.google.gr/search?q=frp+.....69i57j0l3.7035j0j8&sourceid=chrome&ie=UTF-8
first "unlock" your device & then you can unlock bootloader easy ....
sry for english
Click to expand...
Click to collapse
Hey! It worked, thank you very much!

Face_11 said:
I also have a Mi A2 stuck in android logo screen can't can't boot into device developer options to unlock bootloader.
Fastboot oem unlock give me error flashing is not allowed.
Is there anyway around this?
Click to expand...
Click to collapse
https://forum.xda-developers.com/mi-a2/how-to/mi-a2-toolkit-unlock-bootloader-root-t3834585
(or flash stock rom via mi flash tool/ fastboot files) : http://en.miui.com/download-353.html
follow / read fastboot quide : http://en.miui.com/a-234.html

daitalos said:
https://forum.xda-developers.com/mi-a2/how-to/mi-a2-toolkit-unlock-bootloader-root-t3834585
(or flash stock rom via mi flash tool/ fastboot files) : http://en.miui.com/download-353.html
follow / read fastboot quide : http://en.miui.com/a-234.html
Click to expand...
Click to collapse
Thanks. I've tried the MIFlash Tool and I get Error Flashing Not allowed in Lock State. I've also tried the MI A2 ToolKit and get the same message. Basically anything I try and do states device is locked or unable to run in Lock State.
Boot Loader is currently locked and I cannot access developer mode to enable OEM unlocking. Question I have is :
- Can I use EDL Cable to work around this or do EDL cables not longer work with Newer Xiaomi phones?
- If EDL cable doesn't work, is the tespoint method my only option.
thanks in advance

Face_11 said:
Thanks. I've tried the MIFlash Tool and I get Error Flashing Not allowed in Lock State. I've also tried the MI A2 ToolKit and get the same message. Basically anything I try and do states device is locked or unable to run in Lock State.
Boot Loader is currently locked and I cannot access developer mode to enable OEM unlocking. Question I have is :
- Can I use EDL Cable to work around this or do EDL cables not longer work with Newer Xiaomi phones?
- If EDL cable doesn't work, is the tespoint method my only option.
thanks in advance
Click to expand...
Click to collapse
yes it's difficult .... I understand
edl maybe work, but I'm not sure...maybe if you go to a repair shop is a better solution
(see & here : https://forum.xda-developers.com/mi-a2/help/edl-deep-flash-cable-t3828732 )
https://youtu.be/n_7RVmW2Rvs
https://forum.xda-developers.com/showpost.php?p=77327325&postcount=2
Gl

Face_11 said:
Thanks. I've tried the MIFlash Tool and I get Error Flashing Not allowed in Lock State. I've also tried the MI A2 ToolKit and get the same message. Basically anything I try and do states device is locked or unable to run in Lock State.
Boot Loader is currently locked and I cannot access developer mode to enable OEM unlocking. Question I have is :
- Can I use EDL Cable to work around this or do EDL cables not longer work with Newer Xiaomi phones?
- If EDL cable doesn't work, is the tespoint method my only option.
thanks in advance
Click to expand...
Click to collapse
I would try a wipe from the recovery but if that doesnt work then just test point the phone. It isnt that hard, I had to do it myself today because of a soft brick. You just need a T3 screwdriver really. Take out the 2 bottom screws. Take a razor and slide it under the corner of the display and lift it enough the get a credit card in there. Then just work around and you should be able to get the screen off. Take the small metal plate off just above the battery and disconnect the battery and the connector on the right. There will be the test points, short them out, connect the phone to the pc(you can stop shorting out the points when it gets detected) and you have like 10-15secs to start flashing the phone in miflash(obviously you need to have the drivers already set up).

I have same problem with xiaomi mi a2 which had bootloop. Was not able to start device at all so no oem unloco no developer options and no usb debug. It was possible only adb sideload and fastboot. Adb sideload did nothing. I was trying to flash with adb sideload but it stops at 47% with message 1.00 x. Did try several roms with same results. Then i tried fastboot options. Falied to unlock not allowed. Itsl was impossible to get even into phone to activate developer options so i can activate oem unlock and the rest. I tried edl mode which did flash but then i got error message in bootloader it failed to mount system etc. Then i tried mi x6 rom to convert phone to another which doesnt have usual recovery mode but a stripped oem recovery mode. Now when u go back to mi a2 rom its bricked so there is no option of adb at all now. I tried to use mi x6 mi assistant option but app wont recognize usb connection it shows try normal mode then switch. When activating mi assistant on phone it does recognize rom version from recovefy flash in mi assistant app but when it downloads update rom version it cant continue. With pixel you can do anything with adb and it is so easy but xiaomi sucks big time. You cant do anything. Fastboot flashing unlock critical and fastboot oem unlock gets error failed. Flashing not allowed. U tried diferent cables but no luck. So now what? Thats why i hate adb. On samsung odin you can do impossible possible. Even with sp tools on mtk. Even boxes works flawlessly but xiaomi system is just thr worse. It doesnt matter if you get soemthing lost there is always a solution to other phones.

After having device sit as a paper weight for a few months, i broke down and ordered a phone repair kit. Opened device up and flashed via test point method. Worked Flawless. Time to enable OEM unlock so i don't have to open it up again. Thanks to community for all the help.

Use cmd
- go to fastboot then "fastboot oem unlock"
- go to fastboot again "fastboot flashing unlock_critical"
Flash with mi flash
Done

Just stumbled upon this and while may be 18 months too late, here's the step by step process to flash ROM on MI A2 that's giving error "Flash is not allowed in Lock State":
1) switch off device
2) enter fastbood mode (press hold power+vol down few seconds)
3) connect device with laptop
4) install and open adb folder on laptop (https://forum.xda-developers.com/showthread.php?t=2588979)
5) within adb folder -- shift + right click = open powershell here
6) fastboot flashing unlock_critical
7) step #6 may be pointless if phone is bricked but do it anyway
8) fastboot oem edl
9) find and download latest stock rom for your device (FASTBOOT version). It'll be .tgz file
10) extract the image folder from within (would be the same name as .tgz file)
11) open miflash (coudln't find link but look it up, it's easy)
12 select the image folder you extracted in step #10
13) click refresh. device name appear means it's recognized
14) from bottom of mi flash tool select whatever you want. I do "clean all"
15) flash (top right mi flash tool)
Face_11 said:
Thanks. I've tried the MIFlash Tool and I get Error Flashing Not allowed in Lock State. I've also tried the MI A2 ToolKit and get the same message. Basically anything I try and do states device is locked or unable to run in Lock State.
Boot Loader is currently locked and I cannot access developer mode to enable OEM unlocking. Question I have is :
- Can I use EDL Cable to work around this or do EDL cables not longer work with Newer Xiaomi phones?
- If EDL cable doesn't work, is the tespoint method my only option.
thanks in advance
Click to expand...
Click to collapse

Flashing is not allowed in lock state
i got a error recently in my mi a2 no software is installed but locked.
when i try to flash from mi flash tool it says flashing is not allowed in lock state
when i try to unlock in cmd flashing is not allowed in lock state
is there any one to fix this

IamUmesh said:
i got a error recently in my mi a2 no software is installed but locked.
when i try to flash from mi flash tool it says flashing is not allowed in lock state
when i try to unlock in cmd flashing is not allowed in lock state
is there any one to fix this
Click to expand...
Click to collapse
you need to open phone with screwdriver & do the test point ..search for video on YouTube...then EDL deepflash state you can use miflash to put back OFFICIAL only rom to device.

PLEASE HELP - Device Bricked - edl waiting for device

Hello I have a Mi A2 with ONE.
I tried to install Mi6X following this guide:
Guide
I got to step 9:
9- Click Refresh on Mi Flash Then choose Clean all and click flash
Then I got this error:
Error oem edl miflash tool, ACK count don't match
Then I tryed instead to install Jasmine again, and I started getting this error:
Cannot receive hello packet,MiFlash is trying to reset status
And then I was stupid enough to unplug my phone
THE ACTUAL PROBLEM (rigth now)
1. My phone will start, then stay at Mi(mi.com) logo indefinitely.
2. I can't enter download mode, Vol + and power will bring me the Mi logo again and again.
3. Can enter Fastboot mode... BUT...
-Mi flash don't detect it
-miflash_unlock don't detect it
-edl.cmd, unlock auto, and unlock critical say "< waiting for device >"
Edit: I solved the problem using test point to enter EDL mode, then It connected and I could flash it.

our phones (mia2) are weird devices to be honest, mine was recently bricked after choosing the "reboot to bootloader" option in twrp. id recommend you to go to mi service center if your phone is still in warranty

Stoopid Dickhead said:
our phones (mia2) are weird devices to be honest, mine was recently bricked after choosing the "reboot to bootloader" option in twrp. id recommend you to go to mi service center if your phone is still in warranty
Click to expand...
Click to collapse
Thanks for the reply. But unfortunately I can't
That would be my first solution, but my Mi A2 is not in warranty anymore...

have you tried to install stock rom with fastboot?

Maharram said:
have you tried to install stock rom with fastboot?
Click to expand...
Click to collapse
Miflash won't detect the phone, it's like is not connected at all...

puerco-potter said:
Miflash won't detect the phone, it's like is not connected at all...
Click to expand...
Click to collapse
No im not talking about miflash im saying fastboot u can install stock rom with fastboot too you need payload bin dumper and ota flasher for that

Maharram said:
No im not talking about miflash im saying fastboot u can install stock rom with fastboot too you need payload bin dumper and ota flasher for that
Click to expand...
Click to collapse
Sorry, can you help me unsderstand a little.
I found this guide:
Guide
But none of my Roms (Jasmine or Wayne) have a file that's named payload.bin
I feel like I am missing something
Edit:
I found that ota updates are the ones with the payload.bin file followed the guide and everything, but fastboot bring almost the same error that EDL brings:
< Waiting for any device >
Can it be that my cable somehow magically from one conection to another stoped working or something? I asked a friend for his cable... Cs are not as common in this country yet.

puerco-potter said:
Sorry, can you help me unsderstand a little.
I found this guide:
Guide
But none of my Roms (Jasmine or Wayne) have a file that's named payload.bin
I feel like I am missing something
Edit:
I found that ota updates are the ones with the payload.bin file followed the guide and everything, but fastboot bring almost the same error that EDL brings:
< Waiting for any device >
Can it be that my cable somehow magically from one conection to another stoped working or something? I asked a friend for his cable... Cs are not as common in this country yet.
Click to expand...
Click to collapse
Have you enabled oem unlock ?

puerco-potter said:
Hello I have a Mi A2 with ONE.
I tried to install Mi6X following this guide:
Guide
I got to step 9:
9- Click Refresh on Mi Flash Then choose Clean all and click flash
Then I got this error:
Error oem edl miflash tool, ACK count don't match
Then I tryed instead to install Jasmine again, and I started getting this error:
Cannot receive hello packet,MiFlash is trying to reset status
And then I was stupid enough to unplug my phone
THE ACTUAL PROBLEM (rigth now)
1. My phone will start, then stay at Mi(mi.com) logo indefinitely.
2. I can't enter download mode, Vol + and power will bring me the Mi logo again and again.
3. Can enter Fastboot mode... BUT...
-Mi flash don't detect it
-miflash_unlock don't detect it
-edl.cmd, unlock auto, and unlock critical say "< waiting for device >"
Please help, I am really afraid my phone will die permanetly as I can't turn it off and I don't know if it will charge in it's current state.
Click to expand...
Click to collapse
Did you flash hex kernel? You know that phone on 6x miui rom will not boot if you havent flash custom kernel after miui?

Mi flash tool won't work with locked bootloader
Install adb drivers and write command
' abd oem edl '
If ur phones connects
Than u can use mi flash tool

Maharram said:
Have you enabled oem unlock ?
Click to expand...
Click to collapse
I followed this guide to unlock bootloader previous to the guide on flashing of the first post:
GUIDE
The .bat that you run there actually executes "fastboot oem unlock". I did that part without any problem, the phone screen asked for confirmation and everything fine. After succefully unlocking bootloader I followed the guide on flashing Miui 10.
Now even that "fastboot oem unlock" will show this message:
< waiting for any device >

Amnvlad said:
Mi flash tool won't work with locked bootloader
Install adb drivers and write command
' abd oem edl '
If ur phones connects
Than u can use mi flash tool
Click to expand...
Click to collapse
"adb oem edl" brings this error:
adb.exe: unknown command oem
"fastboot oem edl" brings this error:
< waiting for any device >
and
"adb reboot bootloader" brings this error:
error: no devices/emulators found
(tested everything with the phone in fastboot or the Mi logo)

mariosenta said:
Did you flash hex kernel? You know that phone on 6x miui rom will not boot if you havent flash custom kernel after miui?
Click to expand...
Click to collapse
I didn't, because I got an error when flashing Miui, never got to follow the rest of the guide because my phone won't be recognised by any program it seems...
Thanks you all for the help, I will try with another cable, and if that don't work I will test point this little one. I really don't want to open it... but It seems like fastboot won't connect no matter what...

puerco-potter said:
I followed this guide to unlock bootloader previous to the guide on flashing of the first post:
GUIDE
The .bat that you run there actually executes "fastboot oem unlock". I did that part without any problem, the phone screen asked for confirmation and everything fine. After succefully unlocking bootloader I followed the guide on flashing Miui 10.
Now even that "fastboot oem unlock" will show this message:
< waiting for any device >
Click to expand...
Click to collapse
Did you execute this line "fastboot flashing unlock_critical" after fastboot oem unlock?

mariosenta said:
Did you execute this line "fastboot flashing unlock_critical" after fastboot oem unlock?
Click to expand...
Click to collapse
Originally yes, after oem unlock, I ran flashing unlock_critical

puerco-potter said:
I followed this guide to unlock bootloader previous to the guide on flashing of the first post:
GUIDE
The .bat that you run there actually executes "fastboot oem unlock". I did that part without any problem, the phone screen asked for confirmation and everything fine. After succefully unlocking bootloader I followed the guide on flashing Miui 10.
Now even that "fastboot oem unlock" will show this message:
< waiting for any device >
Click to expand...
Click to collapse
You installed oreo on pie? Because Mi A2 has antiroll back projection if you downgrade your Android version then you lost your imei code

Maharram said:
You installed oreo on pie? Because Mi A2 has antiroll back projection if you downgrade your Android version then you lost your imei code
Click to expand...
Click to collapse
6x has antiroll back, a2 does not.
---------- Post added at 11:13 AM ---------- Previous post was at 11:12 AM ----------
[/COLOR]
puerco-potter said:
I didn't, because I got an error when flashing Miui, never got to follow the rest of the guide because my phone won't be recognised by any program it seems...
Thanks you all for the help, I will try with another cable, and if that don't work I will test point this little one. I really don't want to open it... but It seems like fastboot won't connect no matter what...
Click to expand...
Click to collapse
Please, keep us updated.

I had the same issues like you months ago. The only solution you buy a pentalobe 0.8mm for iphone, a small philips screw driver, and a tweezer. Flash your phone in EDL mode. You need to contact 2 pins. You can search the location of the pins, how to disassemble the phone by googling it. then just flash Mi A2 stock ROM first, then convert it to Mi 6X again. I

hasel17 said:
I had the same issues like you months ago. The only solution you buy a pentalobe 0.8mm for iphone, a small philips screw driver, and a tweezer. Flash your phone in EDL mode. You need to contact 2 pins. You can search the location of the pins, how to disassemble the phone by googling it. then just flash Mi A2 stock ROM first, then convert it to Mi 6X again. I
Click to expand...
Click to collapse
No need to convert, now we have miui for a2.

mariosenta said:
No need to convert, now we have miui for a2.
Click to expand...
Click to collapse
Where can I take a look at this? I am really interested.
The cable wasn't the issue, I am getting the tools to open it tonight.

Redmi 4 (Santoni) bricked. Please help.

I unlocked my redmi 4 (Santoni) boot loader and flashed pixel experience ROM (https://mega.nz/#F!INZgnAZI!9fuWhfCuazOO5YPBjxGlmA). It was working fine for a few days (Small heating issue was there). Then one day while i was charging the phone the phone turned off and never turn back on. When i try to switch on the mi logo flashes for a split second and then turns off. I tried to get into recovery but couldn't.
I can get into fastboot mode. I tried flashing the phone using Mi flash tool and fastboot rom. But it shows an error "flash tz error". When i tried an old version of mi flash tool i get the "Unspecified error (0x80004005: FAILED (remote: Critical partition flashing is not allowed))
Please Help.....

can you access the twrp?

foneiamone said:
can you access the twrp?
Click to expand...
Click to collapse
No. I can only access fastboot.

Somebody please help...

unbrick
u can get to edl fastboot with testpoints.
redmi 4x edl fastboot
in edl fastboot flashing should work again :angel:

PierceB said:
u can get to edl fastboot with testpoints.
redmi 4x edl fastboot
in edl fastboot flashing should work again :angel:
Click to expand...
Click to collapse
Dont know how to do that. But i saw some tutorials on how to. Gonna try it. Thank you for the suggestion.

jaseemharry said:
Dont know how to do that. But i saw some tutorials on how to. Gonna try it. Thank you for the suggestion.
Click to expand...
Click to collapse
Did already share a description! https://forum.xda-developers.com/showpost.php?p=74818435&postcount=3 Or U can buy a deepflash cable this should also work.

jaseemharry said:
No. I can only access fastboot.
Click to expand...
Click to collapse
Have you tried installing TWRP via fastboot?

I had the same exact problem, i put my phone on charge & when i came back to check it was switched off. It wouldn't turn on except the mi logo. I tried to flash through fastboot turns out my bootloader was re-locked for some reason. I had to re-unlock it then proceed on to fash fastboot miui rom. Check if your bootloader is locked or not.

foneiamone said:
Have you tried installing TWRP via fastboot?
Click to expand...
Click to collapse
obstinate_penguin said:
I had the same exact problem, i put my phone on charge & when i came back to check it was switched off. It wouldn't turn on except the mi logo. I tried to flash through fastboot turns out my bootloader was re-locked for some reason. I had to re-unlock it then proceed on to fash fastboot miui rom. Check if your bootloader is locked or not.
Click to expand...
Click to collapse
This is a good idea! Probably u first try to install trwp in fastboot mode. If this doesn't work try to unlock bootloader again and then install trwp.
When all these Option doesn't work u still can open the phone and use edl fastboot mode to flash miui again.

jaseemharry said:
I unlocked my redmi 4 (Santoni) boot loader and flashed pixel experience ROM (https://mega.nz/#F!INZgnAZI!9fuWhfCuazOO5YPBjxGlmA). It was working fine for a few days (Small heating issue was there). Then one day while i was charging the phone the phone turned off and never turn back on. When i try to switch on the mi logo flashes for a split second and then turns off. I tried to get into recovery but couldn't.
I can get into fastboot mode. I tried flashing the phone using Mi flash tool and fastboot rom. But it shows an error "flash tz error". When i tried an old version of mi flash tool i get the "Unspecified error (0x80004005: FAILED (remote: Critical partition flashing is not allowed))
Please Help.....
Click to expand...
Click to collapse
No big problem just go in edl mode
Search how to go in edl Redmi 4 in Google
Problem is your boot loader is locked

Harshad patel R said:
No big problem just go in edl mode
Search how to go in edl Redmi 4 in Google
Problem is your boot loader is locked
Click to expand...
Click to collapse
but he already unlocked his bootloader before so it should be easier to unlock in again and then flash whatever he wants...

PierceB said:
but he already unlocked his bootloader before so it should be easier to unlock in again and then flash whatever he wants...
Click to expand...
Click to collapse
One time fail in flashing = locked boot loader
Or for unlocking bootloader from official (easy) need live mobile not dead

foneiamone said:
Have you tried installing TWRP via fastboot?
Click to expand...
Click to collapse
Tried but failed. Boot loader was locked again somehow.

PierceB said:
This is a good idea! Probably u first try to install trwp in fastboot mode. If this doesn't work try to unlock bootloader again and then install trwp.
When all these Option doesn't work u still can open the phone and use edl fastboot mode to flash miui again.
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Tried unlocking boot loader and was not successful because the phone was bricked. My only option was to use edl test point. Now i installed miui 11. (Aprart from some minor bugs which can be eliminated by reflashing some other roms) Thank you guys. Now my phone is successfully unbricked.

For somebody who is having the same issues,
My phone (Redmi 4_Santoni) was completely bricked. The only thing i can access was fastboot by pressing the volume down + Power button combination. But i could not install twrp or any other recovery because my boot loader was locked. I got it fixed completely with the help of you guys (Thanks again) and i want to share the procedure i went through.
Condition: Completely bricked with only fastboot access, Locked bootloader.
I tried this video (https://www.youtube.com/watch?v=j27x5iJSS40) but failed because i could not access recovery. So my only solution was to use edl test point flashing. I followed this guide https://forum.xda-developers.com/showpost.php?p=74818435&postcount=3. It was very easy to do. But in the device manager (Press Windows key + R and then type devmgmt.msc and press enter) instead of showing "Qualcomm HS-USB QDloader 9008", the device is shown as "Qualcomm HS-USB Diagnostics 900E". The problem was you have to plug in in USB cable while the test points is being connected with a pair of tweezers or a paperclip as shown in the link above.
Make sure you already downloaded the latest mi flash tool from here https://xiaomiflashtool.com/ and download fast boot rom from the official website. (Go to https://en.miui.com/ Click rom downloads. Click flashing guide. Download the fastboot rom from there for your device.) Now flash your device using mi flash tool and voila. your phone is unbricked.
Thank you guys..

Question My device is stuck on fastboot screen with a locked bootloader

After successfully installing MIUI EU and using it just fine, I then attempted to lock the bootloader as the phone is going back tomorrow for a screen repair. Upon using the command fastboot oem lock in fastboot mode, the bootloader was locked, but I am now in a bootloop returning me to the fastboot screen no matter what I try. WIth my bootloader locked adb does nothing and same with most fastboot commands. Whenever I try to reboot my device regularly or while using any combination of volume buttons, it shows the MIUI boot screen then straight back to fastboot and repeat.
Any help appreciated, thanks.

10TICKTERROR said:
After successfully installing MIUI EU and using it just fine, I then attempted to lock the bootloader as the phone is going back tomorrow for a screen repair. Upon using the command fastboot oem lock in fastboot mode, the bootloader was locked, but I am now in a bootloop returning me to the fastboot screen no matter what I try. WIth my bootloader locked adb does nothing and same with most fastboot commands. Whenever I try to reboot my device regularly or while using any combination of volume buttons, it shows the MIUI boot screen then straight back to fastboot and repeat.
Any help appreciated, thanks.
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Strange idea to want lock bootloader for repair a screen. Even if you must send to Xiaomi warrantly center / agreed shop, unlock bootloader do not cancel the warrantly. Only desimlock is forbidden.
You must lock your bootloader only from your native official/legit ROM (EEA or Global or CN, etc), but never from a custom MIUI or AOSP because these roms have need to have bootloader unlocked for working.
For now you must
1- using Mi Unlock and Unlock again your device, like the first time (from waiting unlock period) but you will lose all your data, data partition (internal) is wiped.
2- using MiFlash for flash the lastest MIUI fastboot legit rom from your device (EEA ? Global ? CN ?) and be careful , by default (on the bottom right) app install / erase and lock bootloader, choose install / no lock.

I managed to fix it by using Mi Unlock with my sim in another phone for verification, I was just worried I would be faced with the wait again. Thanks.

10TICKTERROR said:
I managed to fix it by using Mi Unlock with my sim in another phone for verification, I was just worried I would be faced with the wait again. Thanks.
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No problem, as soon as you have unlock with success your bootloader the first time, you do not have period unlock anymore