P9 Error when downgrade from c432b167 to c432b136 - Huawei P9 Questions & Answers

Hi Guys,
i really need your help. I debranded and flashed my P9 to a c432b167 firmware using the SRK Tool. But now im unable to downgrade to b136 (to be able to get the b170 OTA).
After i unzipped the full b136 to my SDCard und trying to flash it with the 3-Button Method, im always get an Error at 5%: "Software install failed! - Incompatibility with current version. Please download the correct update package."
Also the full b170 brings the same Error.
I would be very happy if someone could help me
Thanks in advance
mike

i would like to know this too cause whenever i tried to flash a firmware i get the same error.
hope someone can help.

Okay, i was able to solve the problem by myself. Here is what i did:
Using the SRK Tool i reopened the bootloader, installed the twrp recovery and rooted the P9. Then i flashed the c432 oeminfo again. Right after this i was able to flash the c432b136 using the stock recovery without getting the error. When the p9 rebooted i recieved the c432b170 OTA.

Related

L19 Problems during rollback

Hi, first time posting here, forgive me if I'm doing something wrong...
I flashed Nougat beta (L19C432B322), regretted it, and now wanting to go back to EMUI 4.1.1 (before flashing, I was on L19C20B150). Trying to follow the steps for the Huawei official rollback package, but problem is I can't even get the intermediate package (C900B300) to work through dload method... update always fails at 5%.
I am unable to relock my bootloader using the SRK tool. The error I get is "remote: root type is risk".
My phone has never been rooted.
Any help would be greatly appreciated!!
Edit: Tried to flash L19C636B168 full rom using dload method. Now bootloader is locked, but no rom is installed, booting always gives erecovery. Unable to flash any recovery via fastboot.

Forced recovery stuck at 5%

Hey all. I was trying to rollback my P9 to a stock ROM, but it failed and now I am stuck with a bricked P9 (bootloop).
My phone is a European P9 (EVA-L09C432). I have an unlocked bootloader.
- Huawei eRecovery and HiSuite restore does not work.
- I've tried forcing the update using the SRK Tool brick utility, but receive the message "FAILED (remote: sparse flash write failure)" when it's strats writing 'system'.
- My TWRP backup does not work, I had a 7GB backup that installs fine, but the phone is still stuck in a bootloop.
- I can flash EVA-L09C432B378 ROM using the SRK brick utility fine, but the phone is still stuck in a bootloop.
- After I have installed B378 and try to force flash B136 using the dload method, it either gets stuck on the "going into restore mode" or it goes to the "installing package" screen, where it is stuck at 5% until it reboots.
Any suggestions?
try one more time install rollback package by download mode
I've tried. Several times, all day :crying: My process:
Write TWRP from fastboot so I can boot into TWRP and transer UPDATE.app to the dload folder
Reboot into fastboot
Write stock recovery image from fastboot
Boot into recovery mode
Get stuck at 5% on the "Installing update" screen.
I've tried the UPDATE.app or firmware B136 (stock), and UPDATE.app for B378 (Nougat)
Both get stuck at 5%.
I'm stuck at the bootloop
isn't srk tool only for MM?
maybe try extract recovery , boot and system partition from b378 and flash by fastboot , next start flash rollback package by download mode
I noticed when I tried to restore my backup using TWRP it failed at "vendor" (Failed to wipe vendor). I receive this issue at vendor and product.
I tried using fastboot to flash vendor and product manually, I receive these error messages:
"failed: remote command not allowed"
The phone won't allow me to write vendor and product.img... but my bootloader was unlocked?
Is it possible I could have relocked my bootloader? How am I supposed to get the bootloader code for my P9 again :/ It's nearly impossible.
I managed to use the recovery dload method to install a beta version of B378 (build number NRD90M test-keys). Will now try to use the recovery method to roll back to B136 and update back to B378 again.
Highfall said:
I managed to use the recovery dload method to install a beta version of B378 (build number NRD90M test-keys). Will now try to use the recovery method to roll back to B136 and update back to B378 again.
Click to expand...
Click to collapse
I'm having similar issues. Have you solved your problem? What have you tried so far?
Same problem here! Did you resolve?
Thanks you.
Try unplug charger or usb cable then do it
WTF, that ist the solution to the whole damn problem! Just unplugging the damn usb cable and it installs the update just fine. ive spend 2 whole days on this, almost giving it up beacuse everytime it got stuck at 5% and then this...
seriously thank you!
JimmyEatFood said:
Try unplug charger or usb cable then do it
Click to expand...
Click to collapse
thx i managed to boot my device, but i relocked bootloader and factory reset doesnt work correctly it deleted 3rd party apps and leaved few system apps and blotware. what should i do.
and really thanks, you saved me.
Removing cabled worked for me also

Please help unbrick my phone

I have bricked my phone after Magisk install fail.
I first unlocked bootloader succesfully
then i installed twrp succesfully
then i flashed magisk using twrp - this failed and sent device to erecovery. (which won't find package)
i used twrp to wipe data, now i was able to boot, and it installed like a fresh EMUI. However, almost all apps were broken- could not download themes/camera shut down etc.
To fix this, i wanted to restore to stock and did the following: download update package for my VTR-L09 of EMUI b175 (I was on b162 before), used Huawei Update Extractor to extract files and flashed BOOT.IMG, SYSTEM.IMG and RECOVERY.IMG. This was done without error.
Now my phone won't boot at all. I am stuck at the 'your device can't be trusted' screen. I cannot go into recovery. When I connect via USB, I hear the chime in Windows but I can't seem to connect with ADB.
What to do now?? Am I hard-bricked? I hope that anyone knows how to deal with my phone bricked like this. Please help me to solve this issue.
Best of wishes.
Edit: I am able to enter forced recovery, however updates fail at 5%.
I am also able to fastboot with USB, however I am unsure what to do next.
I unbricked my phone! Many thanks to who ah way and his solution found here: https://forum.xda-developers.com/p10/how-to/guide-unbricking-p10-using-hwota-windows-t3714416
:victory:
why are you doing it when you dont understand it?
You cannot flash part of B175 firmwar eover B162 firmware.. OMG.
use the HWOTa to go back to stock and please stop playing with the device without propper knowledge

Can't restore the original fw, need help

I tried to unloock the bootloader and to flash the root, but the P8 lite go in bootloop. i've tried to clean the cahche but not results... tried to flash the update.app from SDcard but ther's an erro thet say wrong version don't now why 'cause is the last original version on the official site, can anyone help?
have you tried installing twrp since fastboot?

GR3 PRA-LA1C185 bricked

Hello everyone
i need help about my device
without making backup, i wiped system , and now am looking how to recover it.
bootloader and frp are UNLOCKED
update.app wont work , cuz it says update install failed
i downloaded many official rom thru huawei firmware finder and flash them with fastboot , but no result.
is there any other solution, or i have to use DC Phoenix .
Thx
https://forum.xda-developers.com/p8...on/guide-unbrick-huawei-p8-lite-2017-t3766678
Try this method or download via eRecovery

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