yashsingh1/xdaforums huggingface dataset:
[Huawei Ascend P6, Mate] ThunderBird891:
Since everybody knows how to upgrade OTA or from LOCAL UPGRADE and go from 4.2 to 4.4 I've decided to let you know how to easily downgrade from 4.4 to 4.2 AND / OR change from Chinese to International Huawei Firmware!

The method I describe here, I've found in some German forums after long search. It really works! 100% tested on my device Ascend P6-U06!

!!! CAUTION !!!

Before you begin, you must be sure you have STOCK recovery, NOT TWRP one!!! This flashable files work and can be flashed only thru STOCK recovery!

If you have TWRP recovery and don't know how to go back to STOCK one, look the SECOND POST in THIS thread and follow the steps there, before you begin this procedure! ONLY after you're done with turning back your STOCK recovery and you're sure of that, you can continue with the following steps:

To Downgrade from Android 4.4 to Android 4.2 / Switch from Chinese to International ROM, do the following:

1. Download this (Unicom 2.0 Downgrade Flashable ZIP) and flash it thru STOCK RECOVERY - https://mega.co.nz/#!ZYVixBqa!JNMLRB2DUVKlGpZVqPJbIsdbVPijks7r1Mtk46KGrmE

This is a 240MB archive, also known as Unicom 2.0 - something like ROM, but it is not an entire ROM, but just part of it, that must be flashed thru stock recovery. You must unzip it, take the dload folder that is inside and put it on you sdcard. Than you can flash it like a local update thru the updater, or you can forcefully flash it - pres power+ volume down+ volume up and it will take you directly to flashing updates thru stock recovery. When you flashed it, you can once again boot normally into you Android device. Now you must take dload folder from the B132 zip (from the link below), once again put it on your sdcard and flash it again using the same methods again thru stock recovery. The cool thing is that the first little flashable zip allows you not just to downgrade from 4.4 to 4.2, but also change from China to International ROMs. So when you're finished flashing this thru stock recovery, flash the official international B125 or B132, wait for the system to install and boot into android. When it is finally booted, you can flash B510 or B512/513 - whatever you want. In my case when I downgraded to B132, after the first boot the system prompted me, that it can be updated directly to B520 OTA. I've updated and now I am once again with International firmware​

2. Download this (B132 International 4.2 Firmware) and flash it thru STOCK RECOVERY ONLY if you already flashed the file in the step above! - https://mega.co.nz/#!5JkAzKpB!nFqfHIHfWo6EO4XPqjO3Gga6a3XWWnqqZxZDZpzAdWE

3. Boot into Official Huawei Android 4.2 firmware and check for update OTA. If you have one - install it. If you don't - you can flash B510 or B512/513/etc...

Enjoy International firmware line again! This method can also be used just to downgrade form Android 4.4 to Android 4.2!

Files are not flashable thru TWRP - please, use ONLY Stock Recovery!

------------------------------------------------------------------------------------------

Please, hit THANKS, if this thread helped you!
[Huawei Ascend P6, Mate] blueIBI:
question: which stock recovery should i take if i have b635 (there is no available official b635 rom - only repack)..

i want to downgrade because i want to get the b520 fw..

maybe you have an advice..

thanks in advance..
[Huawei Ascend P6, Mate] ThunderBird891:
Just try with the stock B510 recovery from the second post in the TWRP recovery theme! I think stock recovery is the same for all 4.4 ROMs and it doesn't matter which one. I recommend the one that I told you about! Should work! I was with Chinese B706 ROM and TWRP. To downgrade I've flashed the B510 stock recovery first and then - step by step as I wrote above.
[Huawei Ascend P6, Mate] blueIBI:
thanks..will try to do that..
[Huawei Ascend P6, Mate] ThunderBird891:
I have a question for you - I see that you modified the .prop file for the local channel, to get louder sound in headphones (from your signature). I've tried to do this today, but when I try to modify the file every time it says - cannot save changes, file cannot be modified, changes not saved! I have root and I've mounted / and /system as writable! I can edit build.pro without any problem and save the changes, but this file - I can't! How did you edited it and how can I edit it too?

Thank you!
[Huawei Ascend P6, Mate] ThunderBird891:
UP!

Moderators, please consider to make this thread sticky / important! Thank you!
[Huawei Ascend P6, Mate] blueIBI:
did not work for me..

i made the following:

flashed stock recovery from b510

took a fresh 4gb sdcard with dload folder on it..inside this folder was the update.app from the unicom rom..

then turned off device..

then pressed power,vol + & - together and held it 'til the recovery screen with yellow writing appeared..

it started to flash..but on the point where the verlist check begins it tells me "fail"!!!..

so what to do now???

i know this procedure..did it with the b506 rom and it worked..but with the b635 rom it won't work..
[Huawei Ascend P6, Mate] ThunderBird891:
Try to flash B706 Chinese EMUI 3.0 new Development edition ROM from the official Huawei web site. If you flash it over the B635 successfully, then you must be able to do this procedure to turn back into international line of ROMs and to B132 4.2 ROM. after that you can flash B510 again. Try this method! I'm pretty sure that it will be possible to flash B706 directly over B635, even than that in the official website it is recommended to update only from B508SP02 official chinese rom. I had success with updating directly to B706 from B512, but if you can't go from B635, try to flash B508SP02 first, than B706 and than downgrade! Should work! Good Luck!
[Huawei Ascend P6, Mate] blueIBI:
got it..

i just had to flash the b125!!!

so easy..i just flashed the stock recovery of b510..made a force update with the b125 (not the p6 unicom 2.0!!!!)..and now i just upgrade my p6 to b520 via OTA!!!

thanks for your help and time!
[Huawei Ascend P6, Mate] ThunderBird891:
You're welcome!
[Huawei Ascend P6, Mate] macklon:
You installed the b706 on b512 ??

Why did they say that to upgrade only on b508

After installing are you facing any problems

Plz reply

Sent from my HUAWEI P6-U06
[Huawei Ascend P6, Mate] ThunderBird891:
No. No problems at all. I think just the upgrade took a little while that usual but it flashed like charm over the B512 without any problems! I think the flashing from B508 is just a recommendation, because the B508SP02 is the latest chinese ROM, and this B706 is Chinese developers edition...
[Huawei Ascend P6, Mate] macklon:
So from b512 to b706 with dload and update

Sent from my HUAWEI P6-U06

---------- Post added at 09:23 AM ---------- Previous post was at 09:21 AM ----------

Which Rom are you using pltl

Sent from my HUAWEI P6-U06
[Huawei Ascend P6, Mate] ThunderBird891:
That's right! Download the official B706 from Huawei EMUI website, unzip it, put the dload folder in you sdcard and then i recomend to make Local update first. If it doesn't want to update thru local update option in the Update Application, then try with forceful update - press and hold power + volume up + volume down and wait until phone boots into stock recovery mode! The update can only be done with stock recovery! If you're on TWRP, that you must go back to stock!
[Huawei Ascend P6, Mate] macklon:
**** :mad: uc browser sucks

I kept to download b508 due to some problem I have to pause it only 36mb was remaining and when I resumed it showed a error was not able to resume the download so I re downloaded the b508 it got downloaded now

So kept to download b706 the same thing happened only 50mb was remaining for the download to complete it showed a error again but this time I did even pause **** :mad:

And now someone told me we can update b706 on b512 no need of b508 :mad::mad::mad:****

Today ill download b706 on chrome:)

Sent from my HUAWEI P6-U06
[Huawei Ascend P6, Mate] gabrymed:
Hi,in my Huawei Ascend P6-U06 i installed firmware B513+EMUI 2.3.

I tried to downgrade with this method but it fails when i flash Unicom 2.0 (i follow the instructions:download it..unzip then put UPDATE.app in dload folder of my sdcard).When i flash it,itfails(i have Stock Recovery,never installed TWRP).

Is this method valid also for B513+EMUI2.3?Or maybe i've done something wrong?:confused:

Any help is very appreciate..Thanks
[Huawei Ascend P6, Mate] ThunderBird891:
Try to flash it forceful with holding all buttons together, or try to copy not only the update.app, but the whole dload folder from the archive. If it's not working, just try to flash B510 or B512 on top of B513 - this should work. After that you can try to downgrade to 4.2 again with the same method!
[Huawei Ascend P6, Mate] gabrymed:
Thanks for your help!

Cause i'm a newbie,i explain you step by step what i've done:

I follow carefully your instructions(part 1),i try to flash it with local update,but i get message "fail"

After that,in stock recovery,i didn't reboot,but i move to option "apply update from external storage" and after a few seconds i have messages:

-wiping cache (at package request)...

-formatting cache

-cache wipe complete

-install from sd card complete

-cust copying files

-copy cust files successed!

It means that the process has been successful ???:confused: If yes then i proceed to downgrade...

If no,i'll try with your advice to flash B510 or B512 on top of B513...
[Huawei Ascend P6, Mate] ThunderBird891:
The process is successful! You must now reboot an go in your android. Now you can copy the other firmware (b510) to your dload folder in sdcard and then try to downgrade! It should work fine!!!
[Huawei Ascend P6, Mate] gabrymed:
Ok,downgraded with success! Now i receive an OTA upgrade to western europe B520 but i think i'll wait for the moment...

Thanks ThunderBird for your help,very appreciate!
[Huawei Ascend P6, Mate] ThunderBird891:
No problem! I think that you have no reason to wait. B520 is very stable and have pretty good battery life at all. I'm very pleased from that ROM. Try it! You won't regret!
[Huawei Ascend P6, Mate] atuili:
Hi!

I update my b512 to b707 and then to b708 chinese version, but i did”t know was the chinese version until i made a factory reset on my phone and now i have only 2 language(english an chinese) and a lot of apps in chinese and the status bar does”t have shortcut. I want to go back to my b512 and i try your method but din”t work for me. What can i do?

Thanks!
[Huawei Ascend P6, Mate] AdnanCG:
I suggest you to try again. Make sure you do this middle step.. I downgraded from B707 following this steps without any problems, it should work for this Chinese version too.
[Huawei Ascend P6, Mate] janpavel:
Hi,in my Huawei Ascend P6-U06 i installed firmware B635+EMUI 2.3.

Now i have a problem when i turn on my phone i am stock on huawei logo and it's not booting up.

I tried to downgrade to b111, b132 or any other available firmware with force upgrade but it's doesn't work.

i have copied the "update.app" in the "dload" folder in the root of the sd card and power it on holding the volume + and - together until it's booting up in system recovery

then appears :

ro.build.version.release = 4.2.2

ro.product.name = UEDGE

Current build version release is not 4.2 . don't need move.

an after this nothing happen, i tried to go .. apply update from external storage / dload but it's showing me the folder is empty

Can any one help me.

Thank you in advance
[Huawei Ascend P6, Mate] blueIBI:
try to boot in bootloader mode (power and vol+ together - the huawei ascend logo apears and it looks like "stuck" - its OK)..

then connect phone to pc..wait until all neccessary drivers have been loaded..

then open inside adb folder (you need adb and fastboot - search for it inside the forum) a cmd window with shift+mouse right click..

of course you need a boot.img and a recovery.img of the b512 (huawei update extractor and the update.app of b512 - search here in this forum for it)..

then you flash the boot and recovery img of b512 - before you have copied the update.app of b512 on your external sdcard inside the dload folder (the sdcard needs to be minimum size of 4gb)..

after all this you can do a force update (power and both volume buttons at same time pressed until the recovery screen apears..and frim here it should run through the "downgrading"..this takes some time (about 8minutes)..

after an automated reboot you should be on b512 again and can configure your phone ;)

hope it helps..

just search the forum..there are many threads about this problem and many solutions..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
Thank you for your quick response

I have understood from your replay that ii need the boot.img and a recovery.img of the b512 and i have found a post on how to get it . http://xdaforums.com/showthread.php?t=2315547

i have also installed adb installer installed on my pc .

can you give me more information than how to flash this with adb . i have found this post for flashing http://xdaforums.com/showthread.php?t=2315547

Thank you.
[Huawei Ascend P6, Mate] blueIBI:
the cmds for adb are simpel..

when you have opened the adb cmd window type "fastboot devices" (because you are in bootloader) - this will give you a number - if not you are not in bootloader or the drivers are missing..

the boot.img and recovery.img of b512 you have put inside the adb folder..

after that type "fastboot flash boot boot.img" (if you have named the boot.img file different then you have to type that name)..

then type "fastboot flash recovery recovery.img" (same as for boot.img - type the name you named it)..

after that just type "fastboot reboot"..

then you can turnoff your phone and do the force update..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
Having an issue

I try to extract the boot.img and recovery,img from B512 firmware but at the and he doesn't create this two .img

i can not find it, do you know what's wrong or i can try to extract this from another firmware B510 for example and then to use this firmware to downgrade ?

Thank you
[Huawei Ascend P6, Mate] blueIBI:
yes you can take the b510 boot.img and recovery.img as well..

my way was to take the b125 (JB firmware) boot and recovery, then flashing this fw and then upgrading to b520 (was shown OTA with the b125)

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
Feeling like i do something wrong

i have downloaded B512 B510 B125 firmware , i extract the update.app the i use the tool split_updata and extract the files

then i open HuaweiFinder and it's telling me that just the system.img it's found.

i don't know what i am doing wrong .

Is that posible that you can help me with one of the firmware boot.img and recovery.img

Many thanks
[Huawei Ascend P6, Mate] blueIBI:
use the huawei update extractor..can be found here inside the forum..

with this you can extract the boot.img and recovery.img easily...

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
thanks

finally it worked , i have mnaged to extract the boot.img and recovery.img and copied in the adb folder

i put my phone in recovery mode holding power and +/- together but when then i connect my phone to pc (nothing happens) then i open cmd inside adb folder

and tipe in fastboot devices then again nothing happen.

where im doing wrong?
[Huawei Ascend P6, Mate] blueIBI:
just push power and volume + to enter the "bootloader" (all three buttons lead to recovery)..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
i have also tried like this (nothing happen)

or it's a longer time press ??
[Huawei Ascend P6, Mate] blueIBI:
i press them about 10seconds..then it looks like as if the phone stucks at the huawei ascend logo..then you are at the bootloader mode..

connect to pc and flash like mentioned before the img files..

after that you have to make a force update: all three buttons at the same time pressed until the recovery shows up (yellow writing apears)

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
seems to be a tricky thing for me

now i am trying to connect my phone with pc (till now not recognized)

i have also downloaded Huawei-Mobile-Driver_v1.0 for P6

but the main issue it's that i hae problem with the USB from phone
[Huawei Ascend P6, Mate] blueIBI:
http://xdaforums.com/showthread.php?t=2953126 read this..

that was what i did to get rid of b635 and finally to the b520..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
after connecting my phone with the pc

and in adb i type in fastboot devices see attached

it's give me no answer but i can see my device connected

any clue?

thank you for the your problem solving but i can not understand very well what i have to do

"just put on a stock recovery (from b510)..then put the update.app from b125 on the sdcard in dload folder.."

if you can be more specific

i have idea i'm not 100% noob :)
[Huawei Ascend P6, Mate] tileeq:
If you can use adb then type this 'adb reboot-bootloader' whitout the quotes and you should make the phone boot in bootloader mode. If all goes ok then check if the phone is stuck on HUAWEI ASCEND P6 screen and connect it to your pc with Usb cable. Then om command line type fastboot devices. If nothing shows up then you need to reinstall the drivers.
[Huawei Ascend P6, Mate] blueIBI:
is your phone still on b635? and rooted? do you have activated the developers option and usb debugging?

if yes - then type "adb devices" instead of "fastboot devices"..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
it's seems to work with adb devices

List of the devices attached

now i have some numbers

but when i add command adb reboot-bootloader then its

restarting but now i am stock on huawei ascend p6 screen

and can't connect with the pc

i had made my phone again in bootloader and now my phone it's connected with the pc
[Huawei Ascend P6, Mate] blueIBI:
:) ok..now that you can see your phone on cmd window type: adb reboot bootloader

after that your phone will turn off and start in bootloader mode (as mentioned your phone will stuck at the ascend logo) - wait for a few seconds (maybe some adb drivers will be installed)..

now you can type: fastboot devices

when you see numbers :) you can start to flash boot.img and recovery.img files:

for that type: fastboot flash boot boot.img (you have to type exactly the name of the boot.img file as it is in the adb folder)

then: fastboot flash recovery recovery.img (same as for boot.img - exact typing)

so now you have flashed new boot.img and recovery.img (of b510 or which ever you extracted)

in my case i have then set up a new sdcard (formatted and 4GB size)..

on this i created a folder named "dload" .. inside this i put the update.app of the b125 firmware..

and then i did a force update (press power & vol+ & vol- together until the recovery will apear)..

then the update will run through - may take about 8-15minutes (sometimes only 5-8minutes)..

if everything is OK your phone restarts and you have a clean B125 FW..

after the basic settings open up the systemupdate app from huawei and you should get the B520 update offered via OTA..

hope this is clear enough now..
[Huawei Ascend P6, Mate] janpavel:
last little thing

now when i type in adb devices

emulator-5554 offline

but i will try to resolve this, found a tutorial

but if you have something more simpler please let me know

solved
[Huawei Ascend P6, Mate] blueIBI:
that is one of the simplest processes i know of..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
this is what i see

should i continue ?
[Huawei Ascend P6, Mate] blueIBI:
yes continue

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
this are the result

but after the last command nothing happen
[Huawei Ascend P6, Mate] blueIBI:
can you show the content of your adb folder..

your boot.img is not the correct size i think

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
here it is

these i have extracted with HuaweiUpdateExtractor

and i just renamed it

because after i extracted it was 09.boot and 08.recovery
[Huawei Ascend P6, Mate] blueIBI:
ok..

i checked with mine..they have the same size..

is your bootloader unlocked?

because it says failure..this happens normaly when the bootloader is locked..
[Huawei Ascend P6, Mate] janpavel:
how can i see this ?

and if it is how can i fix it?
[Huawei Ascend P6, Mate] blueIBI:
fastboot get oem info

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] tileeq:
Try to flash the recovery first.
[Huawei Ascend P6, Mate] janpavel:
not the right command
[Huawei Ascend P6, Mate] janpavel:
this is when i try to flash recovery fist
[Huawei Ascend P6, Mate] blueIBI:
ok..

try the following cmd

fastboot getvar all
[Huawei Ascend P6, Mate] janpavel:
result
[Huawei Ascend P6, Mate] blueIBI:
hm..that is strange..

i don't have any ideas for now...
[Huawei Ascend P6, Mate] janpavel:
than i think leave it for tomorrow

let me know if you have any idea

thanx for your help

Good night here it's 1 AM .......morning at work
[Huawei Ascend P6, Mate] tileeq:
First this command to check if its unlocked - 'fastboot get oem-bootinfo' is it says locked then use this - 'fastboot oem unlock UUUUUUUUUUUUUUUU' and then the first again to confirm it worked.
[Huawei Ascend P6, Mate] janpavel:
Searching the web i found this

Should i try to use this command

fastboot oem device-info

fastboot oem unlock
[Huawei Ascend P6, Mate] tileeq:
Try the second command and see what happens.

---------- Post added at 11:35 ---------- Previous post was at 11:34 ----------

This is the post for the unlocking code and the proper commands.

http://xdaforums.com/showthread.php?t=2666116
[Huawei Ascend P6, Mate] janpavel:
after execute command: "fastboot oem unlock UUUUUUUUUUUUUUUU"

it's says OK

should i continue with flashing boot.img and recovery.img?
[Huawei Ascend P6, Mate] blueIBI:
yes try it now..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
finally both says ok

should i try to reboot and put the b512 update.app in the dload on an sdcard
[Huawei Ascend P6, Mate] blueIBI:
yes do it..should it fail try the b125 fw..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
hmmmmm

something strange , when i enter in the recovery it's the same alike the old one

and again it's not starting to update , idnk what went wrong

i have copied the update.app in a dload folde on the root of the sdcard (2G skandisc)

i enter recovery and then : ro.build.version.release = 4 . 4 . 2

ro.product.name = UEDGE

current build version release is not 4.2 don't need move.

how this is possible after i flashed the b512 boot.img and recovery.img

should i try to flash the boot.img and recovery.img from b125 ?
[Huawei Ascend P6, Mate] blueIBI:
you can do so..but then you must take the b125 firmware..

try another sdcard (recommended is at least a 4GB free space one)..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
i already have almost all the firmware downloaded

i will try the same process with b125 and if it's also not working i will buy tomorrow a new sdcard at least 4G (i plan a 16G sandisk)

i hope to be successful

what fw you recomand to upgrade if i will get the b125
[Huawei Ascend P6, Mate] blueIBI:
when you get the b125 running try to update to b520 through OTA (if available) or trough dload and local update..

Gesendet von HUAWEI Ascend P7-L10 B602
[Huawei Ascend P6, Mate] janpavel:
normally when i i execute adb reboot bootloader my phone restart

but when it's start up with the huawei ascend logo i can't see some yellow command line running on

my device screen . is that normal?
[Huawei Ascend P6, Mate] blueIBI:
yes because it is the bootloader (stuck huawei ascend logo)..

in recovery mode you can see yellow cmd lines during an update..

Gesendet von HUAWEI Ascend P7-L10 B602