Cant update nor rollback rom version - Huawei Ascend P7

Hi someone, i hope...
Recently i do a bad upgrade (I think that i flashed recovery on boot, ups!) and after a long, long while i have the phone working again But....
I can't change rom!!!!
Now i have:
- B609 boot unlocked
- B609 stock recovery
- B609 (Flashed through CWM, the only way i can do it)
But i can't change rom, not by dload, neither twrp, neither cwm
Some help? Any idea?
I can flash every recovery and i have tried to roolback b133, update b620 and even b805, but it doesnt work
Can i try another solution?
Thanks in advance!

I'm having the same issue, neither the original stock rom with emui 2.3 or any 3.0 rom install on my p7, all roms ends with an error and after booting there's some apps missing
EDIT: I've followed the only two guides on this forum and still can't install stock rom emui 2.3

So no way to downgrade from b805???

Hey guys... Look @ my edited answer here:
http://forum.xda-developers.com/showthread.php?p=60766165

I'll try! Thanks!
Tonight i've discovered another issue... :-/
When i switch off the phone and connect usb for charging, the phone switchs on, no charging screen, it boots

I think your phone is "dirty". I dont know the right word in english. Try my solution and be happy

Ohhhh! No luck! It gives me the same error, install failed
I've tried to erase the partitions with fastboot and it says: Command nos allowed, i think' perhaps i have security on, but i dont know how to s-off this terminal

I've entered in engineering mode and i can see: fastboot P7-L10C900B805 while i am in b609 (b805 was installed before the fail) so i have to try to downgrade fastboot. Unfortunately it cannot be done with fastboot, again "Command not allowed" :-S

Try to make a install via fastboot with all partions. I think you can try it with b609. If that not work - i have no idea ! I think that you have to wait for full b805, install that via dload and then you can downgrade. The same issue i have with b609 @ beginn

Flash MyROM 3.3, then flash a 3.0 stock recovery. Now do a normal update to the full b609 using the dload folder. Use thw update feature from the settings menu, and not the 3 button method. From here you can do the same for b621 and then b805.
Hope that helps.

I see this http://forum.xda-developers.com/showthread.php?t=3163748
I think thats help

No way
Nadir_Baderoon said:
Flash MyROM 3.3, then flash a 3.0 stock recovery. Now do a normal update to the full b609 using the dload folder. Use thw update feature from the settings menu, and not the 3 button method. From here you can do the same for b621 and then b805.
Hope that helps.
Click to expand...
Click to collapse
I've tried, same results It's is being complicated...

I can believe it!
87insane said:
I see this http://forum.xda-developers.com/showthread.php?t=3163748
I think thats help
Click to expand...
Click to collapse
Yujuuuuu!!!
I'm now in b800, crossing fingers and copying b609 to flash it.... Flashing!!! Fantastic!!!!!
Huawei cust fail, update post process fail
But I'm on b609, then let's try...
Flashing b621! It's solved!!!!
Thank you very much for your support!
:good::good::good::good::good::good::good::good:
The transition package was the key, but i wasn't thinking in emui version anytime....
b805 again... And.... Success!!!
TWRP and Root (http://forum.xda-developers.com/ascend-p7/general/guide-root-b803-recovery-version-t3157477)
All ok!!!
Thanks, thanks, thanks!

onosenday said:
Yujuuuuu!!!
I'm now in b800, crossing fingers and copying b609 to flash it.... Flashing!!! Fantastic!!!!!
Huawei cust fail, update post process fail
But I'm on b609, then let's try...
Flashing b621! It's solved!!!!
Thank you very much for your support!
:good::good::good::good::good::good::good::good:
The transition package was the key, but i wasn't thinking in emui version anytime....
b805 again... And.... Success!!!
TWRP and Root (http://forum.xda-developers.com/ascend-p7/general/guide-root-b803-recovery-version-t3157477)
All ok!!!
Thanks, thanks, thanks!
Click to expand...
Click to collapse
I'm going to try this method too, wish me luck

Related

[ SOLED] EMUI 3.1 roll back manually

How to manually revert back to from lollipop to EMUI 3. on Kitkat.
I tried to install flashing boot.img and recovery.img and force update, but failed and bricked the phone.
No chance for transition pack since the phone is only in fast boot mode, wiped all data.
(All mistake, but please help)
Its not bricket
Flash Boot.IMG and recover.IMG from 3.1 and then use transition pack. first you have to bring up your system with lollipop / 3.1 - Think in EMUI not in Android.
87insane said:
Its not bricket
Flash Boot.IMG and recover.IMG from 3.1 and then use transition pack. first you have to bring up your system with lollipop / 3.1 - Think in EMUI not in Android.
Click to expand...
Click to collapse
Thank you.
Tried to get 3.1 recovery and boot img but dint get.
Solved the issue with firmwares already with me.
1. Extracted boot, recovery, cust, system image from 609 firmware and flashed all to the phone with adb flash command, phone went into bootloop.
2. Force updated with 800.app (transition pack) in dload folder of SD card, power off, still in boot loop.
3. Force updated with 609.app firmware.
YESSS I am back.
Seems the transition pack brought back the IMUI from 3.1 to 3.0
dranilvt said:
Thank you.
Tried to get 3.1 recovery and boot img but dint get.
Solved the issue with firmwares already with me.
1. Extracted boot, recovery, cust, system image from 609 firmware and flashed all to the phone with adb flash command, phone went into bootloop.
2. Force updated with 800.app (transition pack) in dload folder of SD card, power off, still in boot loop.
3. Force updated with 609.app firmware.
YESSS I am back.
Seems the transition pack brought back the IMUI from 3.1 to 3.0
Click to expand...
Click to collapse
why u just didn't flash 800 in dload and then 609 viad dload again .. without messing some adb fastboot bootloops .. to much messin..
XDADEVX said:
why u just didn't flash 800 in dload and then 609 viad dload again .. without messing some adb fastboot bootloops .. to much messin..
Click to expand...
Click to collapse
Yes, i tried that, but update failed each time.
I did mistake very first, that led to all these mess, tried to install 133 with EMUI 2.3 over the Lollipop, it failed, tried fastboot flash method for 133 again ended up in update failure with all .APP files. That moment I requested for help here.
The above mentioned method only helped me.
You cant falsh a EMUI 2.3 Version over emui 3.1 or 3.0. You have to downgrade. Pls use search!
3 threats are availiable with this issue. Think in emui not in Android.
We try it again.
On witch Version of emui / android your phone starts without touble?
87insane said:
You cant falsh a EMUI 2.3 Version over emui 3.1 or 3.0. You have to downgrade. Pls use search!
3 threats are availiable with this issue. Think in emui not in Android.
We try it again.
On witch Version of emui / android your phone starts without touble?
Click to expand...
Click to collapse
OK, Now in detail.
I am very new to android phone, very new to all these procedures.
My phone after Update to Lollipop lost the key board, before trying any fixes i directly went for re installation.
Tried 133.APP but update failed,(Not aware of versions and other issues, to be honest) so i went for the boot.img, recovery.img extration and flashing using adb (as seen in many threads here), failed.
I tried wiping all data in phone.
So my phone was practically empty, only the flashed boot and recovery images.
Searched the post in forums found out 609, 621, 800 only after i did all wrong.
Okay i unterstand this:
Your phone was on b8xx / emui 3.1 at beginn?
Only keayboard issue was the Problem. And then you've tried to flash b133.
If thats correct you have to flash the last Rom thats booted up your phone. I think that was the lollipop beta. This Rom is not availible as full Rom! Only OTA Version. All *.IMG files must be flash via ADB. Than try to Boot up. If thats work you can downgrade via transition pack to b609 or b133 ......
87insane said:
Okay i unterstand this:
Your phone was on b8xx / emui 3.1 at beginn?
Only keayboard issue was the Problem. And then you've tried to flash b133.
If thats correct you have to flash the last Rom thats booted up your phone. I think that was the lollipop beta. This Rom is not availible as full Rom! Only OTA Version. All *.IMG files must be flash via ADB. Than try to Boot up. If thats work you can downgrade via transition pack to b609 or b133 ......
Click to expand...
Click to collapse
Yes, thats exactly what happened.
Since there is no full rom available, i did something else to come out of the mess.
Any way I learned many things, learning by doing its the best.
okay - its that solved or not? I dont unterstand your answer...
87insane said:
okay - its that solved or not? I dont unterstand your answer...
Click to expand...
Click to collapse
Yes, Now its ok, running on 621 with emui 3.0, but it takes some ram for graphics or so, show 1.85 Gb only dont know whether its normal.
Its normal...
Very nice!
Change thread to [solved] for our gys with the same issue.

How to upgrade from MyRom?

Hi to everyone,
it's possible to upgrade to Lollipop stock from MyROM 3.3 rom?
And how?
Thank you in advance
Flash emui 3.0 stock recovery, then B621 -> B623-> B830.
l3Nni said:
Flash emui 3.0 stock recovery, then B621 -> B623-> B830.
Click to expand...
Click to collapse
Thanks for reply
Need I to install them by update.apk or anything else?
Yes, put the update.app into the 'dload' folder on your ad card and start the update.
l3Nni said:
Yes, put the update.app into the 'dload' folder on your ad card and start the update.
Click to expand...
Click to collapse
Thank you.
I will try,I just hope to don't brick my phone :/
Your welcome. No worries, if something wents wrong you can always flash TWRP and MyRom to get back. The risk of hardbricking is really really low.
l3Nni said:
Your welcome. No worries, if something wents wrong you can always flash TWRP and MyRom to get back. The risk of hardbricking is really really low.
Click to expand...
Click to collapse
It worked,thank you.
Another question,that I think doesn't really match with the argoment of the topic,so if it's not,let me know so I can create a new topic.
As the B830 was full of bug and there was a lot of battery drain,I did a rollback to B126 and installed a custom rom. Today I tried to update to B133 from stock recovery (emui 2.3) but,after 15-20 minutes,it's still stuck in it and looks like the update didn't even started.
In fact, I have got the "DONOT press powerkey or remove battery" on the top,and down I have only got the "This phone is secureboot phone." without any line about the progress of the update.
It's that normal or there's something wrong?
Then the update got stuck. Press power for some seconds (there is no other way than this or letting the bettery go down). Maybe if you're lucky the system works after, if not retry.
When that all doesn't help flash TWRP, MyRom 1.2 then stock recovery and B133.
The Updates often pretty bugged often..
l3Nni said:
Then the update got stuck. Press power for some seconds (there is no other way than this or letting the bettery go down). Maybe if you're lucky the system works after, if not retry.
When that all doesn't help flash TWRP, MyRom 1.2 then stock recovery and B133.
The Updates often pretty bugged often..
Click to expand...
Click to collapse
Ok,i pressed power and the phone rebooted and got back to recovery and is making the update again.
I'will let you know
Def45 said:
Ok,i pressed power and the phone rebooted and got back to recovery and is making the update again.
I'will let you know
Click to expand...
Click to collapse
Anything,it's still stuck on recovery. I'M trying now to boot the phone.
Phone doesn't boot into system,it goes always to recovery and tries to make always the update.
Need I to boot into bootloader,in order to flash TWRP recovery?
Yes boot into bootloader and flash the recovery through adb: "Fastboot flash recovery recovery.img"

[solved] Stuck at B609, weird update behaviour

Hello all,
I want to get back to a "normal system" in order to upgrade to B830. What I did so far:
- When B830 wasn´t out, I changed vendor on B621 to "custc02_vodafone_za" in order to flash B817 --> went fine
- Planning to update to B830, tried to revert trough B800 transition package to B6xx, but got an error
- Few days later flashed B830 boot.img, then tried to flash B830 through dload (someone posted that that works – but not for me)
- Flashed MiUi 5.10.17, but android.system force closed
- Tried MyRom 3.3, but errors both in cwm and twrp
- Tried Se7en Rom 3.8 (based on B602), flashing went fine. But downgrade as in the description doesn´t work.
- Flashing of B609 through dload when on Se7en-Rom/ MiUi also fails
- Flashing flashable B609.zip worked finally
So, I am now on B609, but unable to flash B621/MyRom or whatever. The Update fails immediately.
Does anybody have an idea what I could do? I would really appreciate any help!
Best wishes!
try to replace the twrp/cwm recovery with stock b609 recovery..
then force upgrade b609 again..
after that maybe the b621 update may be flashed through local or force update..
finally the b623 should appear and then the b830 (if not then flash them through local update - especially the b623)..
hope this helps
Gesendet von meinem HUAWEI P7-L10 B830
Thanks for your reply! Unfortunately I already tried that without success, but forgot to mention. The same with 3.0to2.3-downgrade-package/B830/B817..
I assume that by changing the cust following this (http://forum.xda-developers.com/ascend-p7/general/b817-vodacom-users-cust-error-changing-t3211386) guide, something went wrong. Before I did this, all was fine.
@majcomtech sorry for asking so directly, but could you imagine what my problem is? Or what else I could try to revert?
I thought a while about what I´ve done so far and came to the conclusion that downgrading using B800 transition pack failed due to my root access. Flasing Miui (based on Android 4.4) was a mistake and made things complicated.
So I thought about flashing system.img/cust.img/userdata.img/boot.img/recovery.img of B817. Is that a bad idea?
I just don´t want to make things worse and ask first.
Thank you!
I finally made it by flashing system.img/cust.img/userdata.img/boot.img/recovery.img of B817, flashing boot.img(of B830) then updating through dload to B830. B830 had some bugs (no motion control etc.) -->B800-->B621-->cust change back to eu-->reflash B621-->B623-->B830. Maybe this will help anyone, if in a similar situation..
l3Nni said:
I thought a while about what I´ve done so far and came to the conclusion that downgrading using B800 transition pack failed due to my root access. Flasing Miui (based on Android 4.4) was a mistake and made things complicated.
So I thought about flashing system.img/cust.img/userdata.img/boot.img/recovery.img of B817. Is that a bad idea?
I just don´t want to make things worse and ask first.
Thank you!
Click to expand...
Click to collapse
1. Reboot to bootloader
2. Flash CWM 3.0
3. Reboot to recovery mode
3.1 Install from SDCARD1
a. Find My-RoMv3.3.zip
3.2 Back
3.3 Wipe data/factory reset.
3.4 Advance
3.5 Reboot to Bootloader
4. Flash stock recovery for 3.0
5. Flash B621
6. Flash vendor version you want
Now all are normal.
As i wrote above, I was able to solve the problem.. I already tested the way you described , but it didn´t work since I got alway errors in CWM/TWRP.
But now all is fine and thanks for your reply anyway!
l3Nni said:
I finally made it by flashing system.img/cust.img/userdata.img/boot.img/recovery.img of B817, flashing boot.img(of B830) then updating through dload to B830. B830 had some bugs (no motion control etc.) -->B800-->B621-->cust change back to eu-->reflash B621-->B623-->B830. Maybe this help anyone, if in a similar situation..
Click to expand...
Click to collapse
Hi how did you change back to European cust in B621? I'm unable to have the right cust. Thanks
Sent from my HUAWEI P7-L10 using Tapatalk
You can find the cust files here (http://forum.xda-developers.com/showthread.php?t=3211386) in Post #1. Flash them through dload on B621 and you should get back.
Im having something similar.
I have installed the s7ver rom, based on 602.
I changed the recovery to the base one.
Now i tried flashing the update.app from the 609.
tried by force update (Vol+ + Vol- + Power) and via updade from file.
both, give a "Software Update failed" just at start.
It boots normally
Any idea????
Thanks
Look in the Se7en-Rom-3.8 Thread, there is the process oft getting back described. It's because the Rom is based on B602, a beta which is not meant for L10 devices..
l3Nni said:
Look in the Se7en-Rom-3.8 Thread, there is the process oft getting back described. It's because the Rom is based on B602, a beta which is not meant for L10 devices..
Click to expand...
Click to collapse
Found it .... ><
Thanks
http://forum.xda-developers.com/showpost.php?p=56860553&postcount=2

ALE-L21 Bootloop after OTA last night?

Hello all,
I've rooted my P8Lite L21 using the custom recovery method, flashed the supersu.zip, then restored the original recovery.
Yesterday I had an OTA and now phone reboot once during system boot, and at the second time it hangs during boot.
What can I do to recover this? I have stock recovery, and when I try to VOLDOWN+POWER it never goes to fastboot. (last time I had to use adb reboot-bootloader but now I can't reach system\adb..)
Can you help?
Thanks, cheers,
pHk
Phk said:
Hello all,
I've rooted my P8Lite L21 using the custom recovery method, flashed the supersu.zip, then restored the original recovery.
Yesterday I had an OTA and now phone reboot once during system boot, and at the second time it hangs during boot.
What can I do to recover this? I have stock recovery, and when I try to VOLDOWN+POWER it never goes to fastboot. (last time I had to use adb reboot-bootloader but now I can't reach system\adb..)
Can you help?
Thanks, cheers,
pHk
Click to expand...
Click to collapse
Hello,
You can boot to fastboot with this method:
Connect phone with PC then power off
Now push two buttons VOLDOWN+POWER+MicroUSB now you can install any stock ROM with fastboot commands and suitable *.img(boot.img, cust.img, system.img)
P.S
What OTA(number) arrive to you?
sokkoban said:
You can boot to fastboot with this method:
Connect phone with PC then power off
Now push two buttons VOLDOWN+POWER
Click to expand...
Click to collapse
Worked like a charm Thanks a lot! I don't know the OTA number.. Still can't get into system :|
I'll try flashing TWRP from here and then i don't know which rom to use.. I'd like CM12 but i'm not sure its supported.
Can you suggest any stable ROM ?
Thanks
Phk said:
Worked like a charm Thanks a lot! I don't know the OTA number.. Still can't get into system :|
I'll try flashing TWRP from here and then i don't know which rom to use.. I'd like CM12 but i'm not sure its supported.
Can you suggest any stable ROM ?
Thanks
Click to expand...
Click to collapse
First you try to remember what is your last ROM number and your region. Or you can install the last beta on android 5.1.1(B010) need unlocked bootloader
Here all official firmware for device ALE-L21
http://huaweip8lite.blogspot.bg/2016/01/huawei-p8-lieale-l21-official-firmware.html
sokkoban said:
First you try to remember what is your last ROM number and your region. Or you can install the last beta on android 5.1.1(B010) need unlocked bootloader
Here all official firmware for device ALE-L21
http://huaweip8lite.blogspot.bg/2016/01/huawei-p8-lieale-l21-official-firmware.html
Click to expand...
Click to collapse
It's Portuguese\Europe, Single SIM.
I'm downloading "Huawei P8 Lite ALE-L21 V100R001C432B171 (Europe)". Is this flashable from fastboot? Yes, i'm unlocked. Does it need the hiSuite or fastboot.exe will suffice?
Thanks Sokkoban, you're being of great help and I'm thanking all your posts
Phk said:
It's Portuguese\Europe, Single SIM.
I'm downloading "Huawei P8 Lite ALE-L21 V100R001C432B171 (Europe)". Is this flashable from fastboot? Yes, i'm unlocked. Does it need the hiSuite or fastboot.exe will suffice?
Thanks Sokkoban, you're being of great help and I'm thanking all your posts
Click to expand...
Click to collapse
Wait my friend this is single sim ROM
I must download dual sim if you have dual sim device
Yes I'm not shure but if you want install B170 you need first downgrade to B052 then you can install via OTA best and last ROM for you country
sokkoban said:
Wait my friend this is single sim ROM
I must download dual sim if you have dual sim device
Yes I'm not shure but if you want install B170 you need first downgrade to B052 then you can install via OTA best and last ROM for you country
Click to expand...
Click to collapse
Yes, I know this is single SIM. But, why do you say that I need to downgrade to B052 and then OTA? Can't i flash the B170 directly?
The other question i had is, how to flash this. Hisuite or fastboot.exe?
Thanks
Phk said:
Yes, I know this is single SIM. But, why do you say that I need to downgrade to B052 and then OTA? Can't i flash the B170 directly?
The other question i had is, how to flash this. Hisuite or fastboot.exe?
Thanks
Click to expand...
Click to collapse
Because after downgrade you can install any firmware via OTA! (ROM B052 is from the box!)
I write guide how to unbrick ALE-L21 use google translator, download ROM and run file FLASH-ALL.bat http://huaweip8lite.blogspot.bg/2016/01/tutorialhow-to-unbrick-huawei-p8-lite.html
sokkoban said:
Because after downgrade you can install any firmware via OTA! (ROM B052 is from the box!)
I write guide how to unbrick ALE-L21 use google translator, download ROM and run file FLASH-ALL.bat http://huaweip8lite.blogspot.bg/2016/01/tutorialhow-to-unbrick-huawei-p8-lite.html
Click to expand...
Click to collapse
If you don't see any problem, I will try to flash B170 directly, since my bootloader is already unlocked. What do you think?
About the link you sent, the site appears in English, but then it changes to russian? I cannot get it back to EN.
Thanks
How to root samsung galaxy y2 smg130h?
halim4 said:
How to root samsung galaxy y2 smg130h?
Click to expand...
Click to collapse
This was actually funny. :good:
Phk said:
If you don't see any problem, I will try to flash B170 directly, since my bootloader is already unlocked. What do you think?
About the link you sent, the site appears in English, but then it changes to russian? I cannot get it back to EN.
Thanks
Click to expand...
Click to collapse
OK
Try this. Use Huawei update extractor in forum xda have link to it. Open the UPDATE.APP and extract the following files: Recovery.img, Boot.img, Cust.img, System.img
Then use fastboot commands to flash B171 ROM
I wish you success!
Regards
sokoban
Hi there,
I have a similar problem: bootloop!
I'm comming from B170 and installed 7 HD 1.2 ROM and got some errors, I thougt it would be an good to go the long way to B008 or better B010. After so searching I found: http://forum.xda-developers.com/showpost.php?p=64483642&postcount=43
- did not step 1 an under-pressed flashing recovery in step 2 and 3, thought I could yet use TWRP.
Obviously, that was the mistake.
At step 4 I recognized that I have to do step 1 to go on.
that worked an I copied the update.zip to internal card, initialised the update.
Not sure it got to 100% but think so.
Result bootloop, can't get to recovery, only fastboot
Tried to flash every thing: B052, B170, and 136a, even the boot.img and recovery.img of B010 and B008
no errors but still bootloop.
PLEASE HELP!!
is there a full version of B080 somewhere to flash by fastboot? or any options to flash the update.zip of B080 again?
All other proposals are welcome!
Rocketmaster said:
Hi there,
I have a similar problem: bootloop!
I'm comming from B170 and installed 7 HD 1.2 ROM and got some errors, I thougt it would be an good to go the long way to B008 or better B010. After so searching I found: http://forum.xda-developers.com/showpost.php?p=64483642&postcount=43
- did not step 1 an under-pressed flashing recovery in step 2 and 3, thought I could yet use TWRP.
Obviously, that was the mistake.
At step 4 I recognized that I have to do step 1 to go on.
that worked an I copied the update.zip to internal card, initialised the update.
Not sure it got to 100% but think so.
Result bootloop, can't get to recovery, only fastboot
Tried to flash every thing: B052, B170, and 136a, even the boot.img and recovery.img of B010 and B008
no errors but still bootloop.
PLEASE HELP!!
is there a full version of B080 somewhere to flash by fastboot? or any options to flash the update.zip of B080 again?
All other proposals are welcome!
Click to expand...
Click to collapse
First 7 HD 1.2 ROM work only over the B010!!!
Second in this archive have the instructions to install Beta B008 why you not did everything described in the instructions?
Third when install stock firmware RECOVERY must be original not TWRP!!!
Now you must install stok recovery, make hard reset then install B052
After that you can install every stock firmware for your region! or follow the instruction to install B008=>B010=>7 HD 1.2 ROM
Regards
sokkoban said:
First 7 HD 1.2 ROM work only over the B010!!!
Second in this archive have the instructions to install Beta B008 why you not did everything described in the instructions?
Third when install stock firmware RECOVERY must be original not TWRP!!!
Now you must install stok recovery, make hard reset then install B052
After that you can install every stock firmware for your region! or follow the instruction to install B008=>B010=>7 HD 1.2 ROM
Regards
Click to expand...
Click to collapse
I flashed Stock and restarted and flashed B052. What do you mean with hard reset? I not comming in any menu. Only fastboot works.
Still bootloop
Which method use you to flash B052?
sokkoban said:
Which method use you to flash B052?
Click to expand...
Click to collapse
fastboot
Hm, this is very strange!
What device do you have? and which region use?
adb reboot recovery --- says: error: device '(null)' not found
if I try with serialnumber
adb -s W3D7XXXXXXXX reboot recovery ---- says error: device 'W3D7XXXXXXXX' not found
but ---- fastboot devices ----says at the same time: W3D7XXXXXXXX
---------- Post added at 09:57 AM ---------- Previous post was at 09:54 AM ----------
ALE-L21 Germany
So B170 worked in the first place
Try this method and ROM
May be you must use google translator because tutorial is for Bulgarian people
http://huaweip8lite.blogspot.bg/2016/01/tutorialhow-to-unbrick-huawei-p8-lite.html

Need help to downgrade from Nougat to Stock Rom

Hi all, i've been trying to fix this for 2 days and still failed to get it working.
I regret that i quickly jump into the nougat build and would like to get back to stock rom for now.
I tried downloading all the ROMs at stock rom thread and keep on encountering error when update reached 51% with software package/update failed error message.
I'm using P9-L19 and hopefully can revert back to C636 roms.
Thanks.:crying:
have you try this?
http://forum.xda-developers.com/p9/development/tool-srk-tool-huawei-bootloader-root-t3374068
lomunet said:
have you try this?
http://forum.xda-developers.com/p9/development/tool-srk-tool-huawei-bootloader-root-t3374068
Click to expand...
Click to collapse
As someone new to this, this seems kinda complicated.
I'll give it a try. Just have to follow the instruction in the video?
Download the stock rom to external memory card in dload folder and use this code in phone dialer
*#*#2846579#*#*
And select update system
Flash update in dload don't work
Please help
Is your bootloader unlocked? Do you have a twrp backup?
I don't know if that's a good idea, but you could wipe system partition in twrp then flash stock recovery and try stock rom again? Going by the assumption that your current system is causing the update to fail.
Maybe nougat beta has a new recovery that won't flash old firmware? So maybe try an old recovery?
I'm just brainstorming though, no idea if any of this works. So try at your own risk.
yamabokra said:
Download the stock rom to external memory card in dload folder and use this code in phone dialer
*#*#2846579#*#*
And select update system
Click to expand...
Click to collapse
Just ordered a microsd card for this. I'll let you know how once the sd card arrived.
clouds5 said:
Is your bootloader unlocked? Do you have a twrp backup?
I don't know if that's a good idea, but you could wipe system partition in twrp then flash stock recovery and try stock rom again? Going by the assumption that your current system is causing the update to fail.
Maybe nougat beta has a new recovery that won't flash old firmware? So maybe try an old recovery?
I'm just brainstorming though, no idea if any of this works. So try at your own risk.
Click to expand...
Click to collapse
Hello, my P9 is 100% origin.
I managed to use an OTG cable and put the firmware (update.app) on a flash drive under the dload folder. then powered the phone off and pressed both the volume keys + power and the flashing started
you need to download full stock rom the same version as you have before upgrade to N. then try to flash via project menu (*#*#2846579#*#*)
if this method doesn't work you may need to goto recovery menu and wipe data/factory reset. then you might lost all your theme and system apps.
but you will be back to to stable stock rom. if you need to use theme and need the stock system app again to have to Root your device. and install data/hw_init via SRKTool
Hope this help.
OnimushaPooh said:
you need to download full stock rom the same version as you have before upgrade to N. then try to flash via project menu (*#*#2846579#*#*)
if this method doesn't work you may need to goto recovery menu and wipe data/factory reset. then you might lost all your theme and system apps.
but you will be back to to stable stock rom. if you need to use theme and need the stock system app again to have to Root your device. and install data/hw_init via SRKTool
Hope this help.
Click to expand...
Click to collapse
Do you have the full stock rom link available? I tried to wipe data/factory reset and it still remains at 7.0.
calintztan said:
Do you have the full stock rom link available? I tried to wipe data/factory reset and it still remains at 7.0.
Click to expand...
Click to collapse
After wipe data you need to dload stock rom again though
What is your build number before goto 7.0?
OnimushaPooh said:
After wipe data you need to dload stock rom again though
What is your build number before goto 7.0?
Click to expand...
Click to collapse
I tried to dload stock rom and it gives me some weird warning message and the update is stuck at 5% for 30++ mins.
L19 C636 B150 .
calintztan said:
I tried to dload stock rom and it gives me some weird warning message and the update is stuck at 5% for 30++ mins.
L19 C636 B150 .
Click to expand...
Click to collapse
OK you need Eva l19c636b168 you can find it here http://forum.xda-developers.com/p9/development/rom-stock-rom-eva-l19c636b168-t3419586
OnimushaPooh said:
OK you need Eva l19c636b168 you can find it here http://forum.xda-developers.com/p9/development/rom-stock-rom-eva-l19c636b168-t3419586
Click to expand...
Click to collapse
Sadly, it doesnt seems to work. I'll send my phone to service centre tomorrow and hopefully they can fix it.
calintztan said:
Sadly, it doesnt seems to work. I'll send my phone to service centre tomorrow and hopefully they can fix it.
Click to expand...
Click to collapse
First unlock your bootloader - then use Huawei Update extractor to extract ( I suggest the C636B168 Rom) from the Update.App the recovery.img - after flash from an adb folder the recovery.img through fastboot - use the three button to install the Rom and you're ready.
Warning.. everything in your internal storage will be erased so make a backup first.
crispaf77 said:
First unlock your bootloader - then use Huawei Update extractor to extract ( I suggest the C636B168 Rom) from the Update.App the recovery.img - after flash from an adb folder the recovery.img through fastboot - use the three button to install the Rom and you're ready.
Warning.. everything in your internal storage will be erased so make a backup first.
Click to expand...
Click to collapse
This method should work. :good::good:
i installed the huawei p 9 nougat version and i wanted to downgrade but nothing seems to work. I have got unlocked bootloader and when i had emui 4.1 my phone was rooted and i had twrp. But now i can´t boot into twrp. How can i downgrade ?

Categories

Resources