Bootloop after recent Android OTA Update

pangyaaaaaa · Jan 22, 2019

Hello Community,

i have a Problem after the installation of the newest android Update (OTA).
The A2 just Boot till the white AndroidOne Logo and it hangs there after a time it seems it shut down itself.

My Device:
-USB Debugging is disabled, its a new testing device.
-I cant boot in recovery mode (vol-UP+Power) just boots to the white androidOne Screen and there it hangs
- I can enter fastboot(VOL-Down+power) mode and the device is listed when i type fastboot devices in my terminal on pc
- when i fire up MiFlash tool it list my device after clicking refresh, if i want flash the latest FW (http://en.miui.com/download-353.html) i get the error:
error:"Flash bluetooth_a error"
- My bootloader is locked.

Question:
How can I flash a offical Android with a locked bootloader?
is it a good idea? or better send it back for a warranty solution (i dont want wait)
is there another way to solve my problem? i really dont know whats the problem is. i did not rooted the device or anything.
would be lovely if someone could help me. with an instruction what i can try.

Thank you very much and have a nice day

Regards :cowboy:

Reptant · Jan 22, 2019

If you have enabled 'OEM Unlock' setting in Developer settings, you will probably be good, you can unlock bootloader(oem/flashing/critical) and flash the official ROM ( as per now, 10.0.2.0 )

If not, you have 2 options
-Boot into EDL using short points and flash from there
-Warranty

Same thing happened to a friend's phone, it wasn't touched and just went brick after 10.0.2.0 OTA.
Guess everyone should enable 'OEM Unlock' in case this happens(Data Encrypted anyway, worst case stolen phone better than the chance of brick every time an OTA comes)

edit: If you want to save your data, you obviously shouldn't try the bootloader unlock way...EDL flashing allows flashing without wiping data, but haven't tested that personally

pangyaaaaaa · Jan 22, 2019

wow really? that are bad news...

thank you anyway :crying:

maybe someone other got a idea?

regards :cowboy:

UnlimitedBB · Jan 22, 2019

Lot of users faced this after today's update including myself. Since my bootloader is locked, only option left is EDL flashing by connecting motherboard test points.

Abrilabr · Jan 22, 2019

Just an advice for everyone reading this message from a Xiaomi Android One device: ALWAYS KEEP UR BOOTLOADER UNLOCKED, IT DOESNT MATTER IF USB DEBUG ISNT ACTIVE, JUST UNLOCK BOOTLOADER

sorry for caps, is just an important thing, i also had the issue but with unlocked bootloader i solved it easily

ilyas111 · Jan 22, 2019

Just flash using fastboot

Sent from my LG-V930 using Tapatalk

pangyaaaaaa · Jan 22, 2019

Abrilabr said:
Just an advice for everyone reading this message from a Xiaomi Android One device: ALWAYS KEEP UR BOOTLOADER UNLOCKED, IT DOESNT MATTER IF USB DEBUG ISNT ACTIVE, JUST UNLOCK BOOTLOADER

sorry for caps, is just an important thing, i also had the issue but with unlocked bootloader i solved it easily

Yea, but if you want use it as enterprise Device the open Bootloader is a problem.

ilyas111 said:
Just flash using fastboot

Sent from my LG-V930 using Tapatalk

that seems not possible with a locked Bootloader (very new phone)
or can you provide a working solution with a locked bootloader? i wont use this EDL thing because its just new and i dont want open it.

Thank you all anyways

daitalos · Jan 22, 2019

Try with this tool : https://xdaforums.com/mi-a2/development/tool-mi-a2-xtrem-toolkit-t3879660
(edl included)

Cizzle4 · Jan 22, 2019

Same trouble here, we are fu...ed!

xotob · Jan 22, 2019

With Xiaomi mi flash tool, you can re active bootloader protection !
Simple flash with this tool with the option "clean and lock critical"
Works for me !

Cizzle4 · Jan 23, 2019

xotob said:
With Xiaomi mi flash tool, you can re active bootloader protection !
Simple flash with this tool with the option "clean and lock critical"
Works for me !

you had bootloader unlocked, i dont, i cant flash nothing with bootloader locked and i have unchecked the option in debug menù.

boonc · Jan 23, 2019

Reptant said:
If you have enabled 'OEM Unlock' setting in Developer settings, you will probably be good, you can unlock bootloader(oem/flashing/critical) and flash the official ROM ( as per now, 10.0.2.0 )

If not, you have 2 options
-Boot into EDL using short points and flash from there
-Warranty

Same thing happened to a friend's phone, it wasn't touched and just went brick after 10.0.2.0 OTA.
Guess everyone should enable 'OEM Unlock' in case this happens(Data Encrypted anyway, worst case stolen phone better than the chance of brick every time an OTA comes)

edit: If you want to save your data, you obviously shouldn't try the bootloader unlock way...EDL flashing allows flashing without wiping data, but haven't tested that personally

After got OTA update to 10.0.3.0 and Today i try to unlock bootloader but I can't unlock_critical and I can't flashing unlock

rsanzg@gmail.com · Jan 23, 2019

boonc said:
After got OTA update to 10.0.3.0 and Today i try to unlock bootloader but I can't unlock_critical and I can't flashing unlock

Same problem here, does anyone have a solution?

ilyas111 · Jan 23, 2019

Does fastboot mode is detected in pc?

Sent from my MI 6X using Tapatalk

Cizzle4 · Jan 23, 2019

ilyas111 said:
Does fastboot mode is detected in pc?

Sent from my MI 6X using Tapatalk

yes, but i cant use more of fastboot comands, cause bootloader is locked, cant use "flashing unlock/unlock_critical"

nikeon · Jan 23, 2019

Cizzle4 said:
you had bootloader unlocked, i dont, i cant flash nothing with bootloader locked and i have unchecked the option in debug menù.

I'm in your same situation

marioandresl · Jan 23, 2019

Exactly the same situation here... Waiting for a solution without losing warranty.

UnlimitedBB · Jan 24, 2019

I think if your bootloader is not unlocked, the only possible solution left is to shorting the test points on motherboard. Those who have warranty can return the unit for claim. Yet another mess up from Xiaomi and this will be my last phone from them.

pangyaaaaaa · Jan 24, 2019

UnlimitedBB said:
I think if your bootloader is not unlocked, the only possible solution left is to shorting the test points on motherboard. Those who have warranty can return the unit for claim. Yet another mess up from Xiaomi and this will be my last phone from them.

I can understand that. I will claim warranty because its new and i dont want do that test point thing.
on private i would buy and recommend xiaomi anyways but if you want these hardware for some enterprise things then better not.

Iam out of this Thread now but if you want talk here some more feel free.. maybe somebody can bring a solution for all you guys who face this problem but i think its not possible without a open BL or the TestPoint Method.

Regards and have a nice day :cowboy:

alek_dimitrov · Jan 24, 2019

Hi. I'm with locked bootloader. I received new January update. No change - stock variant updated to Pie. So it's safe to update or waiting for new one? Mi A2 4/64 micron ram

Bootloop after recent Android OTA Update

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