method to downgrade from Android 8 - P8lite Q&A, Help & Troubleshooting

Hi, I have a p8lite PRA-LX1, currently with build number PRA-LX1 8.0.0.360(C738). In order to unlock the bootloader I want to follow https://forum.xda-developers.com/p8lite/general/alternative-method-unlocking-bootloader-t3799294
My first challenge is downgrading to Android 5. I tried the eRecovery-method via Huawei Firmware Finder but only got "Getting package failed". DNS was set correctly.
1) Is this method not working with Android 8 anymore?
2) What is an alternative method to downgrade that works with Android 8?
3) Do I understand correctly that "C738" identifies in which way the firmware is branded? Can I only install C738 firmwares or any for PRA-LX1?
Best, fklein

Hi,
Did you find a way since this past year ?
I've got the same problem here with this version PRA-LX1 8.0.0.402(C432pacth01).

Related

VNS-L31C432B130 Firmware Android 7

Hi,
I have a rooted P9 Lite(2016) with Dual SIM and want to Update to Android 7.
But I can't update OTA because it's a rooted device.
My model: VNS-L31C432B130
I think i have 2 options: First is to unroot and update it OTA and than again root, because it's very important to root for me.
Second option is to download and install it manually.
But i don't know which firmware i have to choose. Only thing i know is that my device is VNS-L31 version.
There is so many firmware on the internet. Can i choose all firmware that begins with VNS-L31 or is there something to consider?
For example this version: VNS-L31C636B361
Which way is easier and which firmware should i choose?
thanks
nusre said:
Hi,
I have a rooted P9 Lite(2016) with Dual SIM and want to Update to Android 7.
But I can't update OTA because it's a rooted device.
My model: VNS-L31C432B130
I think i have 2 options: First is to unroot and update it OTA and than again root, because it's very important to root for me.
Second option is to download and install it manually.
But i don't know which firmware i have to choose. Only thing i know is that my device is VNS-L31 version.
There is so many firmware on the internet. Can i choose all firmware that begins with VNS-L31 or is there something to consider?
For example this version: VNS-L31C636B361
Which way is easier and which firmware should i choose?
thanks
Click to expand...
Click to collapse
The right firmware for your phone is L-31C432B370
L-31 is the phone model, if you flash firmwares with wrong phone model your phone will certainly soft brick or brick.
C432 is the region, for example c636 is Oriental/Chinese region, c185 is American or other (I don't remember), c432 is European. If you flash firmwares with wrong region, the phone will probably go into c900, the global region, And it would be difficult to restore to the factory firmware.
B*** is the actual firmware version. From 300 is android nougat, and the versions that end with 0 ("b370") are for dual SIM, those that end with 1 ("b371") are for single SIM.
Sent from my HUAWEI VNS-L31 using XDA Labs
l-31c432b370 how to install
Hi,
I have bricked my device today with this update https://www.androidfilehost.com/?fid=961840155545586862
I install it via twrp and than had the issue with voice command instead keyboard during setup. Fortunately I am now again back to Android 6.
Could anyone please tell me which one I have to choose and by which method I have to install it. I mean, should I install it with stock recovery or with tmrp.
My device is now unlocked and it's rooted with twrp.
Is that the right data: http://www.stechguide.com/huawei-p9-lite-b388-b389-nougat-update/
There are 3 files. One update.app and than Update data and update file. Should i install all 3 files or which one I have to choose?
Ps: Normally my system was Vns-l31c432b130 and now I have Vns-l31c432b161. But the phone is dual sim though.
Many thanks
Solved to rollback and update the usual way
Hello,
if anyone else has the same issue, this is the way to solve it.
First install the right rollback package and the stock Rom.
Here is a tutorial:
https://forum.xda-developers.com/hu...torial-rollback-n-to-mm-c432-devices-t3563955
After I was again on stock, I updated first to b370 and than again updating to b380 by Huawei system update app.
Again unlock and install twrp and su if you wish to.
Many thanks

( Solved ) help phone blocked NRD90M test keys

Hello
I am looking desperately for an android rom 7 or 8 with french language
i tried firmware finder and without result.
here is my configuration
Huawei mate 8
android 6
Emui 4.0
NXT-L09C636B191 simple sim
Boatloader unlocked
Twrp 3.0.2.0 installed
Thank you
ango81 said:
Hello
I am looking desperately for an android rom 7 or 8 with french language
i tried firmware finder and without result.
here is my configuration
Huawei mate 8
android 6
Emui 4.0
NXT-L09C636B191 simple sim
Boatloader unlocked
Twrp 3.0.2.0 installed
Thank you
Click to expand...
Click to collapse
Can't remember off the top of my head because my mate 8 is not with me but I think L29 firmware should be compatible with your firmware also.
Sent from my L29
Hello
2018-01-NXT-L29C432B595-K-ROM-V7 does not install, error misses meta.inf
M8_E5_D_B595_Kvip_v2, does not install
Hello
I am stuck on this version NXT-L09 NRD90M test Keys emui 5.0 android 7.0
boatloader unlocked and impossible to install TWRP
I tried several version 3.0.2.0 or 3.1.1.1 or 3.1.0.0 or 3.2.1.0 without result
I tried other rom since the recovery and failled at 5%
please help
try and unlock the bootloader again,it has relocked itself i think.at least that is what i did and i started working again.i cant update from a rebranded l29c432b180!
yes thanks it's ok
ango81 said:
yes thanks it's ok
Click to expand...
Click to collapse
was that the problem?i had to find out myself,cause nobody said it in the guides.but glad i found it out and even more so if it helped you.managed to rebrand a saudi version to c432 european version with latest b582 firmware.hope it works fine for you too!cheers.

Help to find a guide to update

I need a little help, I read many posts, but I still have not found the correct one, my p8 lite 2017 with twrp installed, based on emui 5.0.1 nougat, I would like to install a base rom oreo emui 8, but first I should install a roman stock emui 8 android oreo, but I can not figure out where I can find a working guide, can someone help me?
thank you so much
my p8 lite 2017 PRA-LX1 single sim
Hi, i use this very easy, i upgrade from stock emui 5 to emui 8
https://forum.xda-developers.com/honor-9/development/tool-flash-official-firmware-recovery-t3769279
green2005 said:
Hi, i use this very easy, i upgrade from stock emui 5 to emui 8
https://forum.xda-developers.com/honor-9/development/tool-flash-official-firmware-recovery-t3769279
Click to expand...
Click to collapse
thanks for help.... but......
R.I.P.
Amen
this procedure doesnt work for me,
im tryed many time but always error, and dont have the oreo installed, then i change the oem info by elite twrp, and now my p8 completely bricked, not enter in fastboot mode, not enter in recovery mod, not in system only in erecovery but procedure via wifi dont start, "package error", via folder dload/update.app not work.....
any suggestion for unbrick?
thanks so much
all this just because I wanted to put a version of the emui no brand, before I had emui 5.x, brand h3g ....
SOLVED, changed oem info eu

Can't find any original firmware for my p9 lite Help

As you guys can see there is no any update for my device because of my device is a demo device but everything is working except the update problem is there any firmware for my device? (Huawei firmware finder didn't find it)
Ofc you don't get updates in a demo phone
Have you tried firmware finder?
zigana88 said:
As you guys can see there is no any update for my device because of my device is a demo device but everything is working except the update problem is there any firmware for my device? (Huawei firmware finder didn't find it)
Click to expand...
Click to collapse
Hello,
if you already got or try to find a way to have your bootloader unlock number,
you can try to rebrand and surely (ex. from C652 to C432 or C185or other) this
will help you to upgrade to emui 5.x / andrid 7.0.
all the best

Update P9 Lite from Android 6 to 7

Hello everyone, I have a P9 Lite which was issued from Vodafone Europe (originally VNS-L21C02B128), and I'd like to update it to Android 7.
Since none of the stock ROMs I tried would pass the verification when updating via the Project Menu, I found and flashed a newer Android 6 which works fine apparently - build number is currently VNS-L21C900B170.
Trouble is all of the newer ROMs are still not working. During the verification phase, it says they are not compatible with the phone.
Any ideas what is the simplest safest way to get to Android 7 ? Thanks for the help.
P9Late said:
Since none of the stock ROMs I tried would pass the verification
Click to expand...
Click to collapse
Have you tried Service ROMs?
https://androidhost.ru/3za
https://androidhost.ru/56i
P9Late said:
originally VNS-L21C02B128), and I'd like to update it to Android 7.
Click to expand...
Click to collapse
- Unlock the bootloader
- on android 6 rebrand to C432 global
- in TWRP install fullOTA-MF-PV VNS-L21C432B370
- then you can upgrade to a higher version by installing a Service ROM via dload method (it will lock your BL again).
The problem is probably with your current build number - the C900 is fake firmware, incomplete or incompatible. I'm afraid you won't be able to unlock the bootloader or rebrand the phone with this build.
Hello Alf, I did try VNS-L21C02B346 but it didn't work, both with the original and the newer ROM. I also tried the "SERVICE Full Repair VNS-L21 C432B381" from here, also with no luck.
The current B170 ROM was labeled as "VNS-L21C432B170" on the site I got it from, but now it shows as C900. This one updated with no problems via the Project Menu upgrade command, the only one to work so far...
I will see later about unlocking the bootloader thanks.
P9Late said:
The current B170 ROM was labeled as "VNS-L21C432B170"
Click to expand...
Click to collapse
You can't install C432 on C02 and vice versa without changing oeminfo, that's why you now have a C900 region and failed verification.
Thanks but I don't know hot to change oeminfo. Can I use SRK Tool ?
Also is there a free way to unlock the bootloader ? Is it this one ?
Does the phone have to be dissasembled, or is there a software method as well ?
Is dc-unlocker free for phones with android 6 and 7 ?

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