[Firmware] EMUI 8.1 / 9.0 Flash, Root and Downgrade Guide (L29C432/L29C636)

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Svetoslav2018

Member
Jun 1, 2018
17
1
Madrid
TWRP does not let me install anything

Hi guys, I just installed 9.0 via HuRUpdater and twrp recovery,everything works perfectly.
But when opening twrp, it does not let me install anything:(
Any ideas???
 
S

Svetoslav2018

Member
Jun 1, 2018
17
1
Madrid
open

The names of the folders are rare
 
osahitzelgsngar

osahitzelgsngar

Senior Member
Aug 7, 2010
461
1,001
since i flashed android pie 9.0.0.163 via Hurupdater on my c432 i cant transfer Data to computer anymore. Phone is only shown as empty CD Drive....
everything else seems to work.
any suggestions?

//edit:
just seen build number is shown as "CLT-LGRP2-OVS" but in flashed firmware stated correct "CLT-L29 9.0.0.163(C432E5R1P9)"
 
Last edited:
osahitzelgsngar

osahitzelgsngar

Senior Member
Aug 7, 2010
461
1,001
Got it! after second try with Re-Flash 9.0.zip stated in first post (first try aborted firmware upload) i was able to recover proper build number, everything work fine again
 
O

otonieru

Senior Member
May 7, 2011
3,440
2,207
Djakarta
Hi @smohanv

EDIT : SOLVED BY FLASHING RECOVERY_META and RECOVERY_VENDOR from fastboot. In case somebody experience same issue during upgrading to 9.0

i flashed 9.0 firmware using HuRU and it went fine, only the version number is messed up . Everything works fine though

things is, now i can't seems get into recovery or TWRP at all,

it always show :

Error mode - Func 11 and 2

even when i tried to re-flash TWRP from fastboot it still show same error. Any idea ?
 
Last edited:
buski

buski

Senior Member
Dec 18, 2012
703
106
Montreal
Where can i findupdate_all_hw.zip? I can only find full ota. Zip for ct L04. I finally decided to get my bootloader unlocked since i was tired of waiting for pie update....
 
E

eracerone

Member
Dec 6, 2010
22
4
Need Help!!

i flash the pie update with the 3 Files via Twrp and HuRu Script.
Flash aborded with Error

update Partition details

Fail to mount /cust
Fail to mount / product
Fail to mount /vendor
Fail to mount /odm
Fail to mount /product
 
O

otonieru

Senior Member
May 7, 2011
3,440
2,207
Djakarta
eracerone said:
Need Help!!

i flash the pie update with the 3 Files via Twrp and HuRu Script.
Flash aborded with Error

update Partition details

Fail to mount /cust
Fail to mount / product
Fail to mount /vendor
Fail to mount /odm
Fail to mount /product
Click to expand...

Use the cmd tools instead of huru. Curent TWRP can't handle the partition properly.
 
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    smohanv
    How to FLASH EMUI 8.1 / 9.0 including latest single base versions (build 197+)

    Your device must have the following
    1. Bootloader should be unlocked (if you have not already unlocked bootloader, there are paid services available)
    2. Enable USB debugging in Settings > Developer options > USB debugging
    3. Remove Fingerprint ID, Face lock and Lock screen password. This is very very important otherwise your device will be soft bricked

    Firmware Download:
    You can download ROM version that you want (EMUI 8.1 / 9.0) from this LINK

    If you do not see latest EMUI 9.0 firmwares, use the links below,
    EMUI 9.0 Build 204
    EMUI 9.0 build 236
    EMUI 9.0 build 241
    EMUI 9.0 build 243
    EMUI 9.0 build 251

    Do not try to update to build 241 straight from EMUI 8.0. It will brick your device and you will end up with black screen. Update to build 195 and then update to any later builds.

    Files that you will be downloading are,
    >> Upto build 195
    update.zip
    update_full_CLT-L29_hw_eu.zip

    >> After build 197 or later
    update_full_base.zip

    Preparation:
    a. Download this Flash tool and extract to your PC
    b. Copy downloaded Firmware files to ZIPS-HERE folder (you can find this folder where you have extracted Flash tool

    How to flash Firmware
    1. Double click to run the file cmd-here.exe. It opens command prompt in the same folder where you are.
    2. Once command prompt opens, type FLASH_two_files.bat if you have multiple Firmware files (2 files) or FLASH_full_base.bat if you have single base file from latest EMUI 9.0. Follow steps carefully. Once flashing is complete, it will boot normally.

    PLEASE NOTE THAT THIS METHOD OF FLASHING DO NOT WIPE DATA and all the installed apps will be intact. But you will loose ROOT. You have root again.

    How to ROOT EMUI 8.1 / EMUI 9.0
    For EMUI 8.1:
    1. Download this TWRP and flash it in fastboot mode
    2. Download Magisk from this LINK
    3. Flash in TWRP (using the command fastboot flash recovery_ramdisk images/twrp.img). twrp.img is already in the Flash tool that you downloaded.

    For EMUI 9.0: Thanks to @ArtaxXP for the findings and the post is here LINK
    1. Pre-patch images you need for different version are below. You will be patching this file yourself with magisk canary version.
    RECOVERY_RAMDIS_163.img
    RECOVERY_RAMDIS_195.img

    RECOVERY_RAMDIS_9.0_204.img
    RECOVERY_RAMDIS_9.0_236.img
    RECOVERY_RAMDIS_9.0_241.img
    RECOVERY_RAMDIS_9.0_243.img
    RECOVERY_RAMDIS_9.0_251.img

    and copy this img to your device (these recovery_ramdisk file extracted from respective EMUI firmware UPDATE.APP)
    2. Download and Install latest magisk manager
    3. Open Magisk manager, go to settings > update channel > Custom and use the link below
    https://raw.githubusercontent.com/topjohnwu/magisk_files/master/canary_builds/release.json
    Click to expand...
    4. Go back to magisk manager default page and refresh (pull down). Install the latest magisk manager version when prompted. Now open magisk manager after installing the updated version and again pull down to refresh
    5. Now you will be asked to download and flash the latest magisk version. Click on Install and when the next window comes choose "patch only the boot.img" option. Choose the image file that you have downloaded from the link in step 1 above
    6. Wait until patching is complete. The patched image will be found in Download folder in your device. Copy this patched_boot.img to your PC in the same folder where you have extracted the Flash tool you used to flash the ROM
    7. Reboot device to fastboot mode and flash patched_boot.img using
    fastboot command ===> fastboot flash recovery_ramdisk patched_boot.img
    Click to expand...
    8. Now issue command fastboot reboot. Quickly unplug USB cable and hold vol-up button. Now your device will be booted in to rooted ROM

    Careful Note:
    If you reboot your device normally, it boots in to non-rooted ROM.

    To boot to rooted ROM, hold vol-up button until Huawei Logo appears while booting.

    IF YOU HAVE PATCHED WITH LATEST MAGISK CANARY BUILD 18.2+, THEN YOU DON'T HAVE TO HOLD VOL UP BUTTON WHEN REBOOTING. JUST POWER YOUR DEVICE NORMALLY AND IT BOOTS IN TO ROOTED ROM

    How to DOWNGRADE from EMUI 9.0 to EMUI 8.1 for ROOTED EMUI
    1. Remove fingerpring, disable screenlock & password and app lock in Settings / Security & privacy. If you miss this step your device will be soft bricked.

    2. Download from here / extract yourself EMUI 9.0 recovery_ramdisk from UPDATE.APP
    RECOVERY_RAMDIS_195.img (EMUI 9.0 release 11.01.2019)

    3. Flash this RECOVERY_RAMDIS_195.img in fastboot and restart your device normally.
    Your device may boot in to eRecovery. Switch off and restart in to fastboot and flash this RECOVERY_RAMDIS_195.img again in fastboot

    4. Folllow the steps explained in How to Flash section.

    How to DOWNGRADE from EMUI 9.0 to EMUI 8.1 for Non-ROOTED EMUI
    Folllow the steps explained in How to Flash section.



    GENERAL TWEAKS
    AdGuard DNS:
    You can read here what is DNS and the goodies of changins it https://www.maketecheasier.com/best-alternate-dns-services/

    If anyone wants to change DNS AdGuard which stops ads in browsing. Flash it in magisk. I have done two versions. Default version blocks ads but allows browsing explicit sites and Family Protection block every ads and also explicit contents.
    Files attached are,
    AdGuard_DNS_(Default).v0.zip
    AdGuard_DNS_(Family_Protection).v0.zip

    Removal of Apps via ADB command:
    If anyone wants to remove bloatware (that you may consider bloat) follow the steps below,
    Note: This command doesn't remove the app altogether from your device. It removes the app from the default user 0. To get the apps back, just factory reset your device.
    1. Download and unzip ADB files [Link]
    2. Make sure that you have enabled USB debugging from Settings / System / Developers options [google search and find how to enable Developer option]
    3. Connect your phone to your PC. Go to the folder where you have extracted the file downloaded from step 1 above
    4. Double click to run the file cmd-here.exe. It opens command prompt in the same folder where you are
    5. Run the command, adb shell
    6. Now you can start debloating the apps that you want to (see commands below)
    pm uninstall -k --user 0 com.google.android.youtube [YouTube]
    pm uninstall -k --user 0 com.android.egg [Easter Egg]
    pm uninstall -k --user 0 com.huawei.gameassistant [Playstore Game]
    pm uninstall -k --user 0 com.huawei.appmarket [Huawei App market]
    pm uninstall -k --user 0 com.android.chrome [Google Chrome]
    pm uninstall -k --user 0 com.google.android.apps.docs [
    pm uninstall -k --user 0 com.google.android.apps.tachyon [Duo]
    pm uninstall -k --user 0 com.android.email [Stock email]
    pm uninstall -k --user 0 com.google.android.gm [Gmail]
    pm uninstall -k --user 0 com.google.android.videos [Google Play Videos]
    pm uninstall -k --user 0 com.google.android.music [Google Music]
    pm uninstall -k --user 0 com.huawei.health [Huawei Health app]
    pm uninstall -k --user 0 com.huawei.phoneservice [HiCare customer service app]
    pm uninstall -k --user 0 com.android.soundrecorder [Stock sound recorder]
    pm uninstall -k --user 0 com.huawei.hifolder [App Advisor]
    pm uninstall -k --user 0 com.android.mediacenter [Huawei Music app]
    pm uninstall -k --user 0 com.huawei.himovie.overseas [Huawei Video player]
    pm uninstall -k --user 0 com.huawei.videoeditor [Huawei video editor]
    pm uninstall -k --user 0 com.huawei.aod [Always on display]
    pm uninstall -k --user 0 com.android.dreams.basic [Daydream]
    pm uninstall -k --user 0 com.android.calculator2 [stock calculator]
    pm uninstall -k --user 0 com.facebook.system [Facebook App Installer]
    pm uninstall -k --user 0 com.facebook.appmanager [Facebook App manager]
    pm uninstall -k --user 0 com.facebook.services [Facebook Services]
    pm uninstall -k --user 0 com.huawei.android.FloatTasks [Navigation dock]
    pm uninstall -k --user 0 com.huawei.livewallpaper.paradise [Paradise Wallpaper]
    pm uninstall -k --user 0 com.huawei.android.thememanager [Themes]

    If anyone find more debloats please share in this thread

    Few debloats submitted by @moonshiner
    pm uninstall -k --user 0 com.huawei.search
    pm uninstall -k --user 0 com.huawei.hwid
    pm uninstall -k --user 0 com.huawei.hitouch
    pm uninstall -k --user 0 com.huawei.hidisk [files explorer]
    pm uninstall -k --user 0 com.huawei.compass
    View
    5
    O
    otonieru
    Hi @smohanv

    i managed to update my C636 P20 Pro to .201 using the new full base .zip

    procedure was changed, it's easier now though. You might want to update the OP (or make it sectional, split between old method and new method)

    Here's the method :
    Pre-Requisites : ROOT

    1. Download EMUI Flasher from HERE (courtesy of @OldDroid) - Dont worry, the app is clean and clean
    2. Download the Latest Approved Update_full_base.zip of your phone model from FF
    3. Open the App, choose the firmware zip you already download. If the app prompt to install some assets, approve it, it need to re-install stock recovery back.
    4. Ignore the second firmware file option
    5. Tap the "Flash Button" on the bottom right corner
    6. Wait till phone boot to recovery, flashing update and finish.
    7. Optional - Re-ROOT using your patched recovery ramdisk
    View
    3
    OldDroid
    OldDroid
    otonieru said:
    Hi @smohanv

    i managed to update my C636 P20 Pro to .201 using the new full base .zip

    procedure was changed, it's easier now though. You might want to update the OP (or make it sectional, split between old method and new method)

    Here's the method :
    Pre-Requisites : ROOT

    1. Download EMUI Flasher from HERE (courtesy of @OldDroid) - Dont worry, the app is clean and clean
    2. Download the Latest Approved Update_full_base.zip of your phone model from FF
    3. Open the App, choose the firmware zip you already download. If the app prompt to install some assets, approve it, it need to re-install stock recovery back.
    4. Ignore the second firmware file option
    5. Tap the "Flash Button" on the bottom right corner
    6. Wait till phone boot to recovery, flashing update and finish.
    7. Optional - Re-ROOT using your patched recovery ramdisk
    Click to expand...

    Just a little note: EMUIFlasher can be used also with unapproved firmwares.

    Regards
    View
    3
    OldDroid
    OldDroid
    smohanv said:
    Thanks for your guide. I have added in OP.
    https://forum.xda-developers.com/hu...c432b131-8-t3809964/post76937061#post76937061
    Click to expand...
    i should open an application thread to provide exact infos.
    The app has been programmed to work with EMUI8 AND EMUI9.

    Regards
    View
    2
    S
    smohanv
    djparent said:
    Is debranding necessary to flash this ROM? I'm on CLT-L04 8.1.0.109(C792), been learning Huawei's intricacies but still not understanding the debranding thing and keep hearing it tossed around. Are the ROMs themselves region locked or something?
    Click to expand...

    Yes you do. You need to debrand.. Search for the thread in this Forum. You have to debrand to C432. Check your version from settings.
    View

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