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Bootloop after recent Android OTA Update

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By pangyaaaaaa, Senior Member on 22nd January 2019, 01:59 PM
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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
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22nd January 2019, 02:22 PM |#2  
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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
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22nd January 2019, 02:25 PM |#3  
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wow really? that are bad news...

thank you anyway

maybe someone other got a idea?


regards
22nd January 2019, 03:12 PM |#4  
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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.
22nd January 2019, 03:57 PM |#5  
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
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22nd January 2019, 04:19 PM |#6  
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Just flash using fastboot

Sent from my LG-V930 using Tapatalk
22nd January 2019, 04:27 PM |#7  
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Quote:
Originally Posted by Abrilabr

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.

Quote:
Originally Posted by ilyas111

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
22nd January 2019, 06:22 PM |#8  
Try with this tool : https://forum.xda-developers.com/mi-...olkit-t3879660
(edl included)
22nd January 2019, 06:48 PM |#9  
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Same trouble here, we are fu...ed!
22nd January 2019, 10:13 PM |#10  
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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 !
23rd January 2019, 08:16 AM |#11  
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Quote:
Originally Posted by xotob

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.
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