Database Users

help | DOWNGRADE TO MM | brick

Okay, so :- :crying::crying::crying::crying:
I was on nougat and went to downgrade and followed ALL instruction apart from one - which was something I missed with translate until i visited the htc page for the tenth time trying to fix this.
:silly: :crying: ----- I didnt change default location whilst running nougat -----:silly: :crying:
I flashed the c432 oem file, and I have tried to update to b151, b150 and b161 all through the update.app method. to no avail.
I have tried flashing everything manually through adb pushing AND fastboot after using the extractor and everything works EXCEPT the system.img. I am faced with an error telling me it has failed, 'unable to mount /system' - - - This message comes through regardless of what I do and im panicking
PLEASE HELP I AM SO STUCK
thank you in advance for any suppport

What P9 lite you have?

Johnny TDN said:
What P9 lite you have?
Click to expand...
Click to collapse
I have the vns-L31 however ive just opened dc unlocker and its showing my model as 21
i can access fastboot and rescue mode as well as twrp although when flashing im faced with the /system error

It is written, on htcmania, using c432oeminfo and b130.
so,
Code bootloader
Twrp meticulus.
Install c432oeminfo.zip, power off
Restart dload c432b130.

Chisetdel31260 said:
It is written, on htcmania, using c432oeminfo and b130.
so,
Code bootloader
Twrp meticulus.
Install c432oeminfo.zip, power off
Restart dload c432b130.
Click to expand...
Click to collapse
i will try that, although ill get errors when flashing the zip - not only that but I cant get to meticulus once its flashed - possibly the system error?

Restart, bootloader code,
Twrp Meticulous, went a wipe, xxxx everything except external storage, installs c432oeminfo.zip, dload c432b130.
http://www.htcmania.com/showthread.php?t=1265458

Chisetdel31260 said:
Restart, bootloader code,
Twrp Meticulous, went a wipe, xxxx everything except external storage, installs c432oeminfo.zip, dload c432b130.
http://www.htcmania.com/showthread.php?t=1265458
Click to expand...
Click to collapse
what do you mean when you say code bootloader? what should i do there? anything im missing?

raihanbam said:
what do you mean when you say code bootloader? what should i do there? anything im missing?
Click to expand...
Click to collapse
Yes, I noticed that from time to time, in bootloader mode, it is written unlocked, but as the device bootloop (bug) I believe it too. so
I retype systematically the bootloader code to open.

raihanbam said:
what do you mean when you say code bootloader? what should i do there? anything im missing?
Click to expand...
Click to collapse
If you have your bootloader unlocked (if you don,t have it, unlock it) and flash TWRP. After that, flash B130 for your VNS-L31. Done.

Unlock yor Bootloader again. And try flashing again.
Have hade the same problem. My bootloader showed unlocked, but he was not.
Ron

raihanbam said:
what do you mean when you say code bootloader? what should i do there? anything im missing?
Click to expand...
Click to collapse
i have followed all of these and notw its stuck on your device is booting.....
i flashed the rom with recovery so now ill try the dload method again, i assume ill have to flash the second zip with recovery?

Chisetdel31260 said:
Restart, bootloader code,
Twrp Meticulous, went a wipe, xxxx everything except external storage, installs c432oeminfo.zip, dload c432b130.
http://www.htcmania.com/showthread.php?t=1265458
Click to expand...
Click to collapse
i am now stuck with your device is booting - cant access fastboot or recovery at all - doesnt show up in adb or fastboot either

raihanbam said:
i am now stuck with your device is booting - cant access fastboot or recovery at all - doesnt show up in adb or fastboot either
Click to expand...
Click to collapse
Shut down your device. Press the switch off for 10 secounds.
When the phone is off, swith on and same time with vol + without usb-kabel, and otherwise try it with usb-kabel.
When you stock recovery starts. You can try a factoryreset.
When you Revolution recovery starts flash oem.info again and perform the dload methode with your right MM UPDATE.APP.
Ron

RonPo said:
Shut down your device. Press the switch off for 10 secounds.
When the phone is off, swith on and same time with vol + without usb-kabel, and otherwise try it with usb-kabel.
When you stock recovery starts. You can try a factoryreset.
When you Revolution recovery starts flash oem.info again and perform the dload methode with your right MM UPDATE.APP.
Ron
Click to expand...
Click to collapse
no matter what I do I'm stuck with the device is booting screen I even let the battery drain to try that way-I'm so screwed

RonPo said:
Shut down your device. Press the switch off for 10 secounds.
When the phone is off, swith on and same time with vol + without usb-kabel, and otherwise try it with usb-kabel.
When you stock recovery starts. You can try a factoryreset.
When you Revolution recovery starts flash oem.info again and perform the dload methode with your right MM UPDATE.APP.
Ron
Click to expand...
Click to collapse
no matter what I do I'm stuck with the device is booting screen I even let the battery drain to try that way-I'm so screwed

RonPo said:
Shut down your device. Press the switch off for 10 secounds.
When the phone is off, swith on and same time with vol + without usb-kabel, and otherwise try it with usb-kabel.
When you stock recovery starts. You can try a factoryreset.
When you Revolution recovery starts flash oem.info again and perform the dload methode with your right MM UPDATE.APP.
Ron
Click to expand...
Click to collapse
okay so I got to the erecovery screen, it only gives the option to dl the latest version and fails along with reboot and shutdown - no wipe

raihanbam said:
okay so I got to the erecovery screen, it only gives the option to dl the latest version and fails along with reboot and shutdown - no wipe
Click to expand...
Click to collapse
OK. Go to bootloader and flash:
fastboot flash recovery recovery.img
fastboot flash boot boot.img
fastboot flash system system.img
extract this files with: Huawei Update Extractor from your Original UPDATE.APP
system.img is loading in steps and need much time.
Ron

Hi guys, i have the same problem after doing some ****, flashed stock rom from lineageos 14 and a lot of things that i'm trying now to unbrick my phone... i cant enter to the erecovery with the 3 buttons method, wathever i do, and i dont have any idea on how to unbrick my phone... I hope someone could help me

help please emui 5.0 MediaPad M3

anyone please help i just accident updated to emui 5.0 and it's now working well i just want to downgrade to emui 4.1 back but i can not find any full firmware

Out of curiosity, how did you managed to do so?

How did you get emui 5.0???

i just use
TaRsY said:
How did you get emui 5.0???
Click to expand...
Click to collapse
https://play.google.com/store/apps/details?id=com.teammt.gmanrainy.huaweifirmwarefinder
but as my situation you don't want to update just now or you like to stuck on beta like me i can not downgrade back

iihito702 said:
https://play.google.com/store/apps/details?id=com.teammt.gmanrainy.huaweifirmwarefinder
but as my situation you don't want to update just now or you like to stuck on beta like me i can not downgrade back
Click to expand...
Click to collapse
You could downgrade back, you just need TWRP and a stock backed up rom XD

thank you but i can not found one(stock rom)
HermitDash said:
You could downgrade back, you just need TWRP and a stock backed up rom XD
Click to expand...
Click to collapse
and i flashed twrp already but cannot boot into it too,

iihito702 said:
and i flashed twrp already but cannot boot into it too,
Click to expand...
Click to collapse
Did you try to boot into it via adb?
Enable Developer Options by tapping the Build number a couple times then enable USB debugging and Tick OEM Unlock.
Use ADB via command
adb reboot recovery
and it should bring you to TWRP or what ever recovery it's on.

thank
HermitDash said:
Did you try to boot into it via adb?
Enable Developer Options by tapping the Build number a couple times then enable USB debugging and Tick OEM Unlock.
Use ADB via command
adb reboot recovery
and it should bring you to TWRP or what ever recovery it's on.
Click to expand...
Click to collapse
sorry i didn't tell i tried every things adb reboot recovery, fastboot reboot recovery, buttons volum(+)+power...

What recovery partition did you choose to install TWRP, recovery or recovery2?

recovery not recovery2
johje said:
What recovery partition did you choose to install TWRP, recovery or recovery2?
Click to expand...
Click to collapse
you think i could try recovery2? is it safe? i never try

I installed TWRP into recovery2 because eRecovery never worked for me. Since you are on a beta version, you might try booting into eRecovery first and trying to see if that brings you back to 4.1, if it doesn't work then install TWRP to recovery2. I have found it easier to boot into because you can just use the volume up from the unlocked bootloader warning screen to launch TWRP.

but
johje said:
I installed TWRP into recovery2 because eRecovery never worked for me. Since you are on a beta version, you might try booting into eRecovery first and trying to see if that brings you back to 4.1, if it doesn't work then install TWRP to recovery2. I have found it easier to boot into because you can just use the volume up from the unlocked bootloader warning screen to launch TWRP.
Click to expand...
Click to collapse
it not going any where just stuck

in Emui 5.0, install this twrp(thanks greatslon) https://goo.gl/ATklu5
if it doesnot boots into recovery by regular vol+,- and power, try again with usb cable connected to computer.
You can also install Magisk and root with phh's systemless root.
Even though i am not sure if you can revert to emui 4.0 from here, because userdata is encrypted, and somehow i was not able to decrypt it or even mount it in twrp.
BTW i had beta emui 5.0 long back, as i applied for beta and got directly as upgrade push. Have been through all of this for my device. Stuck with 5.0 but rooted and having magisk modules working.

bark1234 said:
in Emui 5.0, install this twrp(thanks greatslon) https://goo.gl/ATklu5
if it doesnot boots into recovery by regular vol+,- and power, try again with usb cable connected to computer.
You can also install Magisk and root with phh's systemless root.
Even though i am not sure if you can revert to emui 4.0 from here, because userdata is encrypted, and somehow i was not able to decrypt it or even mount it in twrp.
BTW i had beta emui 5.0 long back, as i applied for beta and got directly as upgrade push. Have been through all of this for my device. Stuck with 5.0 but rooted and having magisk modules working.
Click to expand...
Click to collapse
after fastboot flash recovery twrp_BTV_5_greatslon.img
i try vol(+)+power
vol(+)+vol(-)+power same same

iihito702 said:
after fastboot flash recovery twrp_BTV_5_greatslon.img
i try vol(+)+power
vol(+)+vol(-)+power same same
Click to expand...
Click to collapse
did you connect usb cable to computer or laptop and then try to boot into recovery?
or if it doesnot works, boot into recovery using fastboot boot twrp.imgfilename
both thsese works for me.

still fail
bark1234 said:
did you connect usb cable to computer or laptop and then try to boot into recovery?
or if it doesnot works, boot into recovery using fastboot boot twrp.imgfilename
both thsese works for me.
Click to expand...
Click to collapse
C:\Users\m\Desktop\BTV-DL09\twrp>fastboot boot twrp_BTV_5_greatslon.
img
downloading 'boot.img'...
OKAY [ 0.587s]
booting...
FAILED (remote: Command not allowed)
finished. total time: 0.600s
C:\Users\M\Desktop\BTV-DL09\twrp>

Today i got my M3 back from service center, they flashed stock rom and lock BLD back but i lost warranty all ready ( i unlock it) so they charge me for few bucks anyway i feel happy to get it back and i want to thank you all for replies and helps

What service center did you send it to, I need to do this as well?

Thanks @iihito702, good info, sorry it didn't work for you.

Nougat update

Is there any way to update to android 7.0 emui 5 from stock marshmallow without deleting data?

sirjumpsalot said:
Is there any way to update to android 7.0 emui 5 from stock marshmallow without deleting data?
Click to expand...
Click to collapse
if you already have bootloader unlocked is ok.
if not, after unlock will be a factory reset...

gtdaniel said:
if you already have bootloader unlocked is ok.
if not, after unlock will be a factory reset...
Click to expand...
Click to collapse
My bootloader is unlocked,rooted and twrp installed.I have VNS-L31C432B160.So first,I have to unroot,and then install nougat via proxy method or flash via twrp? After that I dont have to factory reset? Or do I?

sirjumpsalot said:
My bootloader is unlocked,rooted and twrp installed.I have VNS-L31C432B160.So first,I have to unroot,and then install nougat via proxy method or flash via twrp? After that I dont have to factory reset? Or do I?
Click to expand...
Click to collapse
What i do:
1. Unlock bootloader folowing by Automatic Factory Reset. - already done by you
2. Flash TWRP - already done by you
3. From TWRP flash Meticulus TWRP
4. Reboot to TWRP and flash update.zip and update_data_full_VNS-L31_hw_eu.zip, both flash ends with errors, without reboot between flashes.
5. After that, reboot device and boot in system ok, start configuration, etc.
6. Reboot to fastboot and flash Nougat Recovery reworked by @BadWolfYe

gtdaniel said:
What i do:
1. Unlock bootloader folowing by Automatic Factory Reset. - already done by you
2. Flash TWRP - already done by you
3. From TWRP flash Meticulus TWRP
4. Reboot to TWRP and flash update.zip and update_data_full_VNS-L31_hw_eu.zip, both flash ends with errors, without reboot between flashes.
5. After that, reboot device and boot in system ok, start configuration, etc.
6. Reboot to fastboot and flash Nougat Recovery reworked by @BadWolfYe
Click to expand...
Click to collapse
Thank you so much Will do it right now.About the 6th step,the Nougat Recovery one,that is optional right?

sirjumpsalot said:
Thank you so much Will do it right now.About the 6th step,the Nougat Recovery one,that is optional right?
Click to expand...
Click to collapse
I do not called optional, because in Nougat you do not have recovery...

gtdaniel said:
if you already have bootloader unlocked is ok.
if not, after unlock will be a factory reset...
Click to expand...
Click to collapse
But when I unlock the bootloader, I do not lose my data.
I type the code, when I validate on the phone, (1: volume +, then 2: power to validate). It must go quickly.
I press down on volume and power to return to fastboot mode and then install twrpMM, reboot.
At restart, there is all my data.
Then install the two files nougat, reboot, there is always my data.

Chisetdel31260 said:
But when I unlock the bootloader, I do not lose my data.
I type the code, when I validate on the phone, (1: volume +, then 2: power to validate). It must go quickly.
I press down on volume and power to return to fastboot mode and then install twrpMM, reboot.
At restart, there is all my data.
Then install the two files nougat, reboot, there is always my data.
Click to expand...
Click to collapse
Yeap, is very tricky...
From 4-5 times i succeeded 2 times...

gtdaniel said:
Yeap, is very tricky...
From 4-5 times i succeeded 2 times...
Click to expand...
Click to collapse
Just forget fastboot reboot forever.

P9 Lite Bricked. Help me!!!

Hello,
I was always a Samsung fanboy, but than I decided to buy the P9 lite (VNS-L21 single sim)
I wanted to flash the android 7 update for my phone, but I was such a noob in Huawei, that I didn't understand a word. But i tried to do what the instructions said. Now my phone is bricked. I can go to recovery, erecovery (which can't download anyithing) and download mode. I heard of this fastboot stuff as well, but I don't know how to do this. I tried to flash as many roms as I could with dload and it didn't work, after 5%, it said it failed... Now I don't know what to do. I think somebody (expert) should make a clear tutorial for noobs. Oh and I almost forgot that i don't have root, custom recovery, and things like that. I just bought the phone, I didn't want to make big changes, just new android. Is it possible that after this Huawei would fix my phone, if I couldn't? Or warranty is void? And sadly I don't know more of my phone because I'm not ina rom, and the phone and papers don't say more.
If you could help me, I would appreciate it:
Raul

Turn off your phone, connect to the pc while holding the volume down button, you will end up in fastboot mode.
I assume you have ADB and drivers installed (if not, install ADB and device drivers).
Optional: unlock your bootloader if it's locked.
Download the latest offical rom zip for your phone version (the marshmallow one), extract the update.app.
Use Huawei extractor to ectract the following files (google is your friend in this one, but its not difficult):
boot.img
recovery.img
cust.img
system.img
After you've done this, connect your phone to the PC in fastboot mode .
Open a command promt from the folder where the extracted files are (shift+right click, Open Command window here), enter the following commands
fastboot devices (you will see the list of attached devices with a lot of random number + fastboot)
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash cust cust.img
fastboot flash system system.img
fastboot reboot
After all this, you should be good to go, just be sure you are using the correct rom for you version.
Or you can just serach on the forum and find this.
https://forum.xda-developers.com/huawei-p9lite/help/unbricking-vns-l21-vns-l31-tutorial-t3583400
(Sorry for my english.)

Fastboot says that it has failed command not alllowed, after I want to installl the files. And I couldn't unlock bootloader without phones information...

rr999999 said:
I would happily unlock my bootloader, but I don't know anyithing about my phone (except model...) without the os...
Click to expand...
Click to collapse
Post here IMEI and SN from the box of phone and i can try get your bootloader unlock code...

If I would unlock it, would fastboot work? Because fastboot pc app recognizes my phone, but my phone says in fastboot mode, that I should connect itself to pc and open hisuite. WTF?

rr999999 said:
If I would unlock it, would fastboot work? Because fastboot pc app recognizes my phone, but my phone says in fastboot mode, that I should connect itself to pc and open hisuite. WTF?
Click to expand...
Click to collapse
Until you have bootloader unlock you can not run any fastboot flash command...

rr999999 said:
If I would unlock it, would fastboot work? Because fastboot pc app recognizes my phone, but my phone says in fastboot mode, that I should connect itself to pc and open hisuite. WTF?
Click to expand...
Click to collapse
Heyho,
normally yes, after bootloader unlock u are able to flash via fastboot. But...
I tried to flash as many roms as I could with dload and it didn't work, after 5%, it said it failed...
Click to expand...
Click to collapse
What is the error? - Have u disconnected the device from the PC during the update?
If not, try to update again and just disconnect the device from any USB connection...
Regards,
Sebastian

k1ll3r8e said:
Heyho,
normally yes, after bootloader unlock u are able to flash via fastboot. But...
What is the error? - Have u disconnected the device from the PC during the update?
If not, try to update again and just disconnect the device from any USB connection...
Regards,
Sebastian
Click to expand...
Click to collapse
Hello. I disconnected it from everything (for example USB)When I tried to install it said something like incompatibility version, but it couldn't be because I tried many roms for my phone. And I tried some dual sim roms as well because, I thought that it might work... But then I will do that unlock if it will do good. Thanks for the help Without bootloader I can't flash from dload as well?

rr999999 said:
Hello. I disconnected it from everything (for example USB)When I tried to install it said something like incompatibility version, but it couldn't be because I tried many roms for my phone. And I tried some dual sim roms as well because, I thought that it might work... But then I will do that unlock if it will do good. Thanks for the help Without bootloader I can't flash from dload as well?
Click to expand...
Click to collapse
Heyho,
the dload method works always without unlock bootloader. But, u can't flash for example an B161 over an B3xx (what nougat is) if the update u installed modified already the oeminfo u are not able to flash any rom below B3xx (nougat) via dload.
-
In that case u might use the official rollback package (never tested it myself) or, u unlock ur bootloader, flash a TWRP recovery matching to ur current FW. Flash from there a oeminfo + custom.bin (lower than B3xx) and flash the FW matching to the new oeminfo via dload and stock recovery.
Regards,
Sebastian

If you have custom recovery, wipe everything. Data, system, boot. extract update app (which is your stock rom) with huawei update extractor. go to custom recovery, flash stock boot IMG and stock recovery IMG. Power off, use three button dload method, reboot, when booting press vol up for three second, now you are in e-recovery. Press shutdown. Press and hold power and vol up for stock recovery. Do factory reset. If need do the factory reset 2/3 times. Now you are with locked bootloader.
Sent from my NEM-L21 using Tapatalk[/QUOTE]
Sent from my NEM-L21 using Tapatalk

Unlocking bootloader

With the huawei support down, could anyone please help me to unlock huawei nova 2i RNE-L22 bootloader and to root it?

DC. UNLOCKER?
https://www.dc-unlocker.com/how-to-read-huawei-bootloader-unlock-code

bootloader unlock codes forbidden
Chisetdel31260 said:
DC. UNLOCKER?
It says
> If your phone runs Android 8 or later with latest security patch - then this service won't work!
I have the latest security patch(March 1, 2019), I've been searching for the past 3 days for a working method to root my mate 10 lite, found nothing.
Huawei stopped providing oem unlock codes, All the services that provided unlock codes for money are now obsolete too.
I'm trying to find a way to root this phone on my own, but I'm not sure where to go from here.
I've read this book today "XDA Developers' Android Hacker's Toolkit", but it teaches how to use rooting methods that are already out there and not how to create your own way to root a device.
Can you provide guidance on where to go from here to learn how to find vulnerabilities in android?
Click to expand...
Click to collapse

"If your phone runs Android 8 or later with latest security patch - then this service won't work! " it's true , you must downgrade to Nougat via HiSuite .

it works
bozka1 said:
"If your phone runs Android 8 or later with latest security patch - then this service won't work! " it's true , you must downgrade to Nougat via HiSuite ane than using Service ROM flash FW with security patch max. april 2018. After you can get bootloader unlock code here
(4€/4$).
Service ROMs you can find here :
Type RNE- or Rhone or Mate 10 lite. Gl!
Click to expand...
Click to collapse
Thanks, it worked!
I got my bootloader unlocker, now I'm installing a custom rom, but there's no much custom roms for mate 10 lite.

m10_lite said:
Thanks, it worked!
I got my bootloader unlocker, now I'm installing a custom rom, but there's no much custom roms for mate 10 lite.
Click to expand...
Click to collapse
Best Custom ROM is Stock ROM & root .

bozka1 said:
Best Custom ROM is Stock ROM & root .
Click to expand...
Click to collapse
Do you have the guide for rooting RNE-L21, stock ROM, Android and EMUI version 8.0?

davideakc said:
Do you have the guide for rooting RNE-L21, stock ROM, Android and EMUI version 8.0?
Click to expand...
Click to collapse
He did already
bozka1 said:
"If your phone runs Android 8 or later with latest security patch - then this service won't work! " it's true , you must downgrade to Nougat via HiSuite ane than using Service ROM flash FW with security patch max. april 2018. After you can get bootloader unlock code here
https://www.dc-unlocker.com/how-to-read-huawei-bootloader-unlock-code
(4€/4$).
Service ROMs you can find here :
https://androidhost.ru/search.html
Type RNE- or Rhone or Mate 10 lite. Gl!
Click to expand...
Click to collapse

ante0 said:
He did already
Click to expand...
Click to collapse
Sorry, I've not explained clearly what i want to do...
I'm already with bootloader unlocked, I need a guide for root the phone

davideakc said:
Sorry, I've not explained clearly what i want to do...
I'm already with bootloader unlocked, I need a guide for root the phone
Click to expand...
Click to collapse
Sorry, I misread. xD
Well, you can either flash TWRP for Oreo. Not sure which is "best" though, take one with decryption support if available for RNE on Oreo. Then you flash Magisk zip in twrp.
Or you can take your stock ramdisk and patch it in Magisk Manager, then flash the patched ramdisk from fastboot.
I would provably go with TWRP and Magisk zip though, as you would need a stock ramdisk from an update.app of your build. So saves some downloading
Basically flash TWRP using fastboot: fastboot flash recovery_ramdisk twrp.img
Reboot to recovery which will end up in TWRP. Flash latest Magisk using the Install button in twrp.

ante0 said:
Sorry, I misread. xD
Well, you can either flash TWRP for Oreo. Not sure which is "best" though, take one with decryption support if available for RNE on Oreo. Then you flash Magisk zip in twrp.
Or you can take your stock ramdisk and patch it in Magisk Manager, then flash the patched ramdisk from fastboot.
I would provably go with TWRP and Magisk zip though, as you would need a stock ramdisk from an update.app of your build. So saves some downloading
Basically flash TWRP using fastboot: fastboot flash recovery_ramdisk twrp.img
Reboot to recovery which will end up in TWRP. Flash latest Magisk using the Install button in twrp.
Click to expand...
Click to collapse
Don't worry, thanks for the fast reply!

davideakc said:
Don't worry, thanks for the fast reply!
Click to expand...
Click to collapse
I can't find any TWRP with decryption. This one might work, it's from the MorfuZ thread: https://mega.nz/#!uD4FlCqL!ERBzP4ZWa2sR8f_wnn15F_cOFCdYVKgfYETjiehQkkQ
So it may or may not have working decryption. But if you have an external SD it doesn't really matter as you'd only transfer magisk to that.
Magisk from here: https://forum.xda-developers.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445
Download latest stable.
Flash twrp using fastboot.
Reboot to recovery.
Transfer magisk zip to external SD.
Flash Magisk zip using the Install button
You will probably have to browse to /external_sd manually as it will default to /sdcard in the install browser.
If it fails to install using TWRP:
Open terminal in TWRP from the Advanced button then enter this command:
dd if=/dev/block/bootdevice/by-name/ramdisk of=/external_sd/ramdisk.img
This will dump your stock ramdisk to external sd, which you then can patch in Magisk Manager and flash the output file to 'ramdisk' using fastboot. You will have to install Magisk Manager apk first though, it can be found in the Magisk thread.

davideakc said:
Do you have the guide for rooting RNE-L21, stock ROM, Android and EMUI version 8.0?
Click to expand...
Click to collapse
Only EMUI 8.x !!!
Your device must have an*unlocked bootloader.
Huawei HiSuite installed on your computer because it will install all the USB drivers
Download and install*Minimal ADB and fastboot Tool*on your computer. The folder location should be C:\Program Files(x86)\Minimal ADB and fastboot.
https://www.the***********.com/minimal-adb-and-fastboot-tool-for-windows/
Download*TWRP-oreo-smart.img*file
https://mega.nz/#!Fgd0xa4R!1o5ejzDnkLJLG2tAZG-STtlJ4nnNCHfwwZdOlmOkrVw
Copy the downloaded* TWRP file to the*Minimal ADB and fastboot folder.
Enable OEM unlocking on your phone (developer options) and USB debugging mode.
Now launch MAF32.exe (or cmd-here) file from the Minimal ADB and fastboot folder, a command window will open up.
Turn off your phone and connect to your PC. Reboot to fastboot mode using button combination Power and Volume down.
In the command window, enter the following commands one by one
- fastboot devices - this command will verify connection in fastbot mode (you will see your serial number)
-fastboot flash recovery_ramdisk TWRP-oreo-smart.img
-fastboot reboot - the device will reboot
Now you can boot into TWRP mode using button combination Power and Volume Up or command*
adb reboot recovery
Download and copy to SD card latest Magisk.zip.
Boot your phone into TWRP,* in TWRP main menu tap 'Install', then navigate to the*Magisk.zip , tap it, then ‘Swipe to confirm Flash’.*
When the process is complete, tap Reboot System.
Enjoy !*

bozka1 said:
Only EMUI 8.x !!!
Your device must have an*unlocked bootloader.
Huawei HiSuite installed on your computer because it will install all the USB drivers
Download and install*Minimal ADB and fastboot Tool*on your computer. The folder location should be C:\Program Files(x86)\Minimal ADB and fastboot.
https://www.the***********.com/minimal-adb-and-fastboot-tool-for-windows/
Download*TWRP-oreo-smart.img*file
https://mega.nz/#!ot8TGIIa!1o5ejzDnkLJLG2tAZG-STtlJ4nnNCHfwwZdOlmOkrVw
Copy the downloaded* TWRP file to the*Minimal ADB and fastboot folder.
Enable OEM unlocking on your phone (developer options) and USB debugging mode.
Now launch MAF32.exe (or cmd-here) file from the Minimal ADB and fastboot folder, a command window will open up.
Turn off your phone and connect to your PC. Reboot to fastboot mode using button combination Power and Volume down.
In the command window, enter the following commands one by one
- fastboot devices - this command will verify connection in fastbot mode (you will see your serial number)
-fastboot flash recovery_ramdisk TWRP-oreo-smart.img
-fastboot reboot - the device will reboot
Now you can boot into TWRP mode using button combination Power and Volume Up or command*
adb reboot recovery
Download and copy to SD card latest Magisk.zip.
Boot your phone into TWRP,* in TWRP main menu tap 'Install', then navigate to the*Magisk.zip , tap it, then ‘Swipe to confirm Flash’.*
When the process is complete, tap Reboot System.
Enjoy !*
Click to expand...
Click to collapse
If I do this, I lost all apps and data or not?

davideakc said:
If I do this, I lost all apps and data or not?
Click to expand...
Click to collapse
No you won't, but you should always backup your data.

AztekSoul said:
No you won't, but you should always backup your data.
Click to expand...
Click to collapse
And after flashing that TWRP can I still install Huawei updates like security patches etc... even if I don't have stock recovery?

davideakc said:
And after flashing that TWRP can I still install Huawei updates like security patches etc... even if I don't have stock recovery?
Click to expand...
Click to collapse
Yes you can, although you have to download updates through firmware finder and update with HuRUpdater in twrp.

davideakc said:
And after flashing that TWRP can I still install Huawei updates like security patches etc... even if I don't have stock recovery?
Click to expand...
Click to collapse
Then there is another solution - install TWRP over eRecovery (my own experience) :
- copy to SD card TWRP-oreo-smart.img
- in main TWRP menu tap Install image, then navigate
to the TWRP-oreo-smart, select
eRecovery_ramdisk and confirm Flash . System
reboot.
- Download and copy to the Minimal ADB and fastboot folder RECOVERY_RAMDISK330.img
https://mega.nz/#!I511VK4b!9cGodiCORHOvXndOCHyqcezpHmUk2zeTslqpbZe8pk4
Connect your phone to PC in fastboot mode and install recovery_ramdisk using command
- fastboot flash recovery_ramdisk RECOVERY_RAMDISK330.img
- fastboot reboot
How to boot into TWRP: reboot your phone and press Volume Up key up to 3 seconds to enter TWRP.

bozka1 said:
Then there is another solution - install TWRP over eRecovery (my own experience) :
- copy to SD card TWRP-oreo-smart.img
- in main TWRP menu tap Install image, then navigate
to the TWRP-oreo-smart, select
eRecovery_ramdisk and confirm Flash . System
reboot.
- Download and copy to the Minimal ADB and fastboot folder RECOVERY_RAMDISK330.img
https://mega.nz/#!I511VK4b!9cGodiCORHOvXndOCHyqcezpHmUk2zeTslqpbZe8pk4
Connect your phone to PC in fastboot mode and install recovery_ramdisk using command
- fastboot flash recovery_ramdisk RECOVERY_RAMDISK330.img
- fastboot reboot
How to boot into TWRP: reboot your phone and press Volume Up key up to 3 seconds to enter TWRP.
Click to expand...
Click to collapse
After that, how can I restore factory eRecovery?

davideakc said:
After that, how can I restore factory eRecovery?
Click to expand...
Click to collapse
Okay, one can install Magisk without TWRP. There are plenty of guides on how to do these things in the Mate 10 forums. Of course, TWRP makes things easier ....