FORUMS

[GUIDE] How to unbrick HUAWEI P8 when failed to update and ends in bootloop

1,592 posts
Thanks Meter: 310
 
By bihslk, Senior Member on 30th November 2015, 06:34 PM
Post Reply Email Thread
Hi

I see someone here have problems with bricked phone. It just keeps restarting and you cant even turn it off.

The problem is here that UPDATE never ended to 100% and software successfully changed boot.img to the new one
but with old system on the phone.

Its even worse if you have TWRP recovery installed before update then it will brick the phone too.
Allways install stock recovery on current rom before update firmware.

Ok i will start now with this guide because i had same problem and fixed it by myself.
I will not put any links to downloads find them self GOOGLE is your friend

First of all if you were on B200 5.0.1 version of android then you need B170 firmware to extract boot.img and recovery.img from
the UPDATE.APP file

For that you need a software called Huawei Firmware Extractor
Download it and install

Now you need even ADB/FASTBOOT on the computer. If you dont have download and install. Install even drivers for the phone

Now Open the Huawei Extractor and add the UPDATE.APP file.
Now you will see alot of files below

Now mark the boot.img system.img and recovery.img and extract them to the desktop of your PC

Now copy those files to the ADB/FASTBOOT folder.

You phone i still under the bootloop and you need to get it into FASTBOOT mode. Only way to do it is to plug in USB cable to the phone.
Now as soon the phone reboots by itself hold Power and Vol down button until you see white screen and fastboot mode

Now go to the ADB/FASTBOOT folder where you copyed files and hold shift and press right mouse button to get "Open command window here"

So you will be in fastboot and you will see C:/ADB that is right directory

Now start with fastboot erase cache
Then write fastboot flash boot boot.img and hit enter
When done do following fastboot flash recovery recovery.img and hit enter
You can if you want even try to flash system.img by writing fastboot flash system system.img or fastboot flash system.img dont remember that combination
but try and see wich works.

Now write fastboot rebootand phone will reboot . If you still have bootloop then as soon phone goes black then Hold Vol+up and Power until you see recovery.
Over there make factory reset and cache and then reboot.
If you still cant boot into recovery then you need to get Firmware B170 and put it on you SD card in DLOAD folder
to flash it from scratch. Same here is that you need to have USB plugged in in order to get to EMUI flash mode or it will wont work.

Remember that you only need UPDATE.APP in the DLOAD folder from B170 firmware.


I know my English sucks but im trying to help...
The Following 19 Users Say Thank You to bihslk For This Useful Post: [ View ] Gift bihslk Ad-Free
13th December 2015, 09:08 AM |#2  
Member
Flag Cluj Napoca
Thanks Meter: 2
 
More
hello, i tried bouth solutions and i cant get my phone to boot up i dont now maybe i am doing something wrong i was on b200 rooted and twrp instaled an i updated to android 6 and i m stuck in bootloop you can help me with something i am out of ideas. thanks in advance
13th December 2015, 10:52 AM |#3  
sokkoban's Avatar
Senior Member
Flag Plovdiv
Thanks Meter: 673
 
Donate to Me
More
Quote:
Originally Posted by noraru

hello, i tried bouth solutions and i cant get my phone to boot up i dont now maybe i am doing something wrong i was on b200 rooted and twrp instaled an i updated to android 6 and i m stuck in bootloop you can help me with something i am out of ideas. thanks in advance

Yes, this is the your mistake
Never update firmware with instaled TWRP. First you need to flash to factory recovery then install the original firmware like B170(B200), then update to Marshmallow
13th December 2015, 11:32 AM |#4  
rndll's Avatar
Senior Member
Thanks Meter: 67
 
More
Nevermind, fixed it.
13th December 2015, 12:41 PM |#5  
Member
Flag Cluj Napoca
Thanks Meter: 2
 
More
Quote:
Originally Posted by sokkoban

Yes, this is the your mistake
Never update firmware with instaled TWRP. First you need to flash to factory recovery then install the original firmware like B170(B200), then update to Marshmallow

i know is my mistake , i flash recovery img from b170 but i cant get in to recovery mode anymore hao much i have to push the vol up+power buton? i only can boot in to fastboot
13th December 2015, 01:04 PM |#6  
TopperBG's Avatar
Senior Member
Flag Bulgaria
Thanks Meter: 481
 
Donate to Me
More
Quote:
Originally Posted by rndll

Nevermind, fixed it.

How please ?
The Following User Says Thank You to TopperBG For This Useful Post: [ View ] Gift TopperBG Ad-Free
13th December 2015, 01:10 PM |#7  
rndll's Avatar
Senior Member
Thanks Meter: 67
 
More
Quote:
Originally Posted by TopperBG

How please ?

You don't flash img files through the recovery. Flash recovery.img, boot.img, system.img and cust.img manually through the fastboot screen (vol down + power) using either the windows command or mac terminal.
The Following 2 Users Say Thank You to rndll For This Useful Post: [ View ] Gift rndll Ad-Free
13th December 2015, 01:16 PM |#8  
TopperBG's Avatar
Senior Member
Flag Bulgaria
Thanks Meter: 481
 
Donate to Me
More
Thank you, at the moment I'm trying the same.

---------- Post added at 03:16 PM ---------- Previous post was at 03:12 PM ----------

Quote:
Originally Posted by rndll

You don't flash img files through the recovery. Flash recovery.img, boot.img, system.img and cust.img manually through the fastboot screen (vol down + power) using either the windows command or mac terminal.

Which firmware, I've tried with full B200 and extracted images, but no success. B170 ?
13th December 2015, 09:12 PM |#9  
TopperBG's Avatar
Senior Member
Flag Bulgaria
Thanks Meter: 481
 
Donate to Me
More
Don't have success, please give advices ?
14th December 2015, 04:10 AM |#10  
rndll's Avatar
Senior Member
Thanks Meter: 67
 
More
1. I Download the B313 update and extract the boot.img and recovery.img from update.app using Huawei Firmware Extractor.

2. Connect your P8 to your PC/Mac. Hold down volume down + power just before you feel the vibration and the Huawei logo shows up. This will boot you to the Fastboot/Rescue screen.

3. Using the windows command prompt or mac terminal, flash the B313 recovery and boot images using Fastboot:

Code:
fastboot flash boot boot.img
Code:
fastboot flash recovery recovery.img
After flashing these, if you reboot normally, the bootloop should be gone but you will get stuck at the Huawei logo. However, you'll now be able to access recovery (volume up + power) and the 3 button update (vol up + vol down + power) modes.

You can now reboot either holding the power down or issue a fastboot command:
Code:
fastboot reboot
4. This may be optional and may not have any bearing but at this point I was ok with losing data just to get the phone booting again. Boot to the recovery (volume up + power) Yes, it's not that easy using the buttons. Just try it until you get the recovery to boot.

In recovery select Wipe data/factory reset and Wipe cache partition.

5. Download the B170 Full ROM and extract the dload and custom folder to your microSD. Use a card adapter/card reader.

6. IMPORTANT: Disconnect your P8 from your computer if it is still connected. Doing the next step while you're connected through USB will cause the update to get stuck at 90% and if you force a reboot, your device will bootloop again.

7. Reboot from the recovery and boot into the EMUI Updater using the 3-button method (volume up + volume down + power). Let the phone update and voila! You're back in business!
The Following 7 Users Say Thank You to rndll For This Useful Post: [ View ] Gift rndll Ad-Free
14th December 2015, 07:25 AM |#11  
TopperBG's Avatar
Senior Member
Flag Bulgaria
Thanks Meter: 481
 
Donate to Me
More
Confirm, it works!
@rndll bold and make red color B313
The Following User Says Thank You to TopperBG For This Useful Post: [ View ] Gift TopperBG Ad-Free
Post Reply Subscribe to Thread

Tags
huawei-p8

Guest Quick Reply (no urls or BBcode)
Message:
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes