Android 10 GSI Installation thought fastboot - Huawei P20 Lite Questions & Answers

Hi, I have a Huawei P20 lite and I would like to know how to safely and revertably install Android 10’s GSI.
Is there any way of this being reverted back to stock?
I wanted to know before starting. Thanks

Flash stock system.img or dload method. But checked it, doesn't work

Related

Restore Stock FW Huawei Mate 10 PRO (BLA-09)

Hi guys,
yesterday I succesfully unlocked bootloader on my Mate 10 PRO (Bla-L09) and installed LineageOS 15.1 with success.
The problem is that now I just want to recover my stock firmware on it.
I downloaded the update.zip from the site (for my branded phone) and it was C55 version but I don't know how to repair it. Just tried to reflash stock recovery and start recovery mode but with no success. Installation hang on 5% and then phone reboots automatically.
Already tried to flash SYSTEM.img (from Huawei Update Extractor) with fastboot: it flashes correctly but im impossible to boot the devices.
I am sure that I do something wrong. Can you help me please?
Hi,
Where have you found original stock rom. It is my impression that it is not available. Could you please provide a link?
Thanks
outlier91 said:
Hi guys,
yesterday I succesfully unlocked bootloader on my Mate 10 PRO (Bla-L09) and installed LineageOS 15.1 with success.
The problem is that now I just want to recover my stock firmware on it.
I downloaded the update.zip from the site (for my branded phone) and it was C55 version but I don't know how to repair it. Just tried to reflash stock recovery and start recovery mode but with no success. Installation hang on 5% and then phone reboots automatically.
Already tried to flash SYSTEM.img (from Huawei Update Extractor) with fastboot: it flashes correctly but im impossible to boot the devices.
I am sure that I do something wrong. Can you help me please?
Click to expand...
Click to collapse
After flashing back stock system.img you need to Factory Reset in stock recovery. Alternatively use HWOTA: https://forum.xda-developers.com/mate-10/how-to/guide-mate-10-flash-oreo-update-package-t3716814
Always make a Twrp backup of your rom so you don't have to worry about flashing back like this.Thats what I do and I have never had a issue.

Desperate help needed to go back to stock (Mate 10 Pro EMUI 8 TWRP & MAGISK) BLA-L09

Desperate help needed to go back to stock (Mate 10 Pro EMUI 8 TWRP & MAGISK) BLA-L09
Hello there. I'm used to Samsung devices and the more I read about Huawei devices the more lost I feel about them.
So, my Mate 10 pro BLA-L09 is currently running Build Number 8.0.0.131(C782). It is rooted with Pretoriano's TWRP and Magisk (Using the All-In-One tool). Of course, I can't get any pending update installed. I would like to receive that EMUI 9 update. I've read people have been successful using HuRupdater and some others ended up with a hard bricked device. Some other people suggest the safest option is to uninstall Magisk, flash stock recovery and let the phone update itself.
So far, I've downloaded the same full 8.0.0.131(C782) firmware I'm on from Firmware Finder and downloaded Huawei Update extractor to extract the recovery from UPDATE.APP. However, instead of having one recovery file to extract, there are 3 Recoveries (named: RECOVERY_RAMDIS, RECOVERY_VBMETA, RECOVERY_VENDOR) and another 4 E-Recoveries.
Can anyone please give me some step by step guidance on what to do? I'll Paypal you a beer if I'm successful with the help.
Cheers!
May be you can simply dload the firmware and then it should be full stock if dload works. Dload guide is given in my signature
shashank1320 said:
May be you can simply dload the firmware and then it should be full stock if dload works. Dload guide is given in my signature
Click to expand...
Click to collapse
Thanks! But I think dload won't work with custom recovery, right? I'm on TWRP. And getting stock recovery is just what I'm trying to achieve.
93starletgt said:
Thanks! But I think dload won't work with custom recovery, right? I'm on TWRP. And getting stock recovery is just what I'm trying to achieve.
Click to expand...
Click to collapse
Dload replaces your twrp and custom boot both. It will bring back your phone to full stock. Else you could extract the images from your firmware and then flash. Let me give you the commands.
Thanks! I just fixed my issue by flashing this through TWRP: it Installs the Oreo stock recovery.
The procedure was:
-Booted into TWRP
-Uninstalled Magisk (by flashing Magisk Uninstall Zip)
-Flashed the stock recovery (from the link below) through TWRP
-Reboot
-Check for system updates, phone will install them with no problems
Phone will be unrooted and will have stock recovery. Don't know if this will work for every stock build, it worked with mine 8.0.0.131(C782).
Link:
https://mega.nz/#!8Swx3QaC!3JQ9imU70E9O1BxgO53Z754lGCZxCbKGgSHqvTEcXsQ
I was getting the command ready for you. Glad you fixed it yourself
[*]Run the command to boot to fastboot
Code:
adb reboot bootloader
[*]On fastboot screen, you will have bootloader state as Unlocked and FRP Unlocked.
[*]Flash the stock Recovery Ramdisk as
Code:
fastboot flash recovery_ramdisk <Recovery_File_Name>.img
[*]If you have installed magisk, flash the stock boot ramdisk.img as
Code:
fastboot flash ramdisk <ramdisk_File_Name>

Honor 9 bootloop after wrongly updated to EMUI9 by fastboot

I've always been on Openkirin roms, but I wanted to tested the new EMUI9 rom. I followed a guide from Openkirin to go back to stock EMUI, but I directly used EMUI 9 files. So I flashed by fastboot EMUI9 SYSTEM.IMG, KERNEL.IMG, RECOVERY_RAMDISK.IMG.
Now is my Honor 9 stuck in a bootloop. I can only access erecovery (the white version). At this moment (after hours of trying and trying) I've not succeeded in booting into TWRP after flashing it. I can't even get into stock Recovery. Also download mode is no option.
Someone who can help me how to fix this?

Twrp on stock android 10

I tried to install twrp on my Xiaomi mia3 but it stocks in fastboot, so I had to install again my stock Android 10. Is there anyway to install the twrp on stock room without roll back to Android 9 ? Thanks.
yes may problem with install twrp on stock Android 10

Downgrading from Android 12 to 10

I extracted the boot.img from the latest factory Android 10 and made it into .tar. If I install it via Odin, would I then be able to downgrade to the Samsung factory firmware v10? If not, can I downgrade to Android 11?
boot.img is just the kernel, it's not really what's keeping you from downgrading. If you want to use something like Android 10 you're going to have to install custom recovery (root) and flash boot.img, system.img, vendor.img and a few things I may be missing. And even then, this isn't a guarantee that it'll boot.
Once bootloader updates there is no flashing backwards. The only way you can is if the firmware you are flashing to has same bootloader version that you are already on
idk if its even possible
because it'll cause a bootloop
my suggestion is - dont try it

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