Database Info

[GUIDE][A-ONLY][PIE][M205x] Guide on How to flash GSI (Updated:22/06/2019)

I'm not responsible for whatever damage this could possibly cause to your device.
If you appreciate the work i have done, Feel free to buy me a cup of coffee @paypal
Welcome to GSI For Galaxy M20 ONLY FOR M205F/M205G​
Some information you should know..
Full TREBLE Documentation here : https://source.android.com/devices/architecture
Generic System Image (GSI) Documentation here : https://source.android.com/setup/build/gsi
Make sure you install TWRP : https://forum.xda-developers.com/galaxy-m20/development/recovery-twrp-3-2-3-galaxy-m20-t3906705
If any bugs you face, Report them to the appropriate Threads of the GSI you installed or github issues section, as those are not mine to fix i only provide Guide that allows GSIs to run on.
- VENDOR FEATURES:
Wi-Fi & Hotspot
Telephony & Ril (Mobile Data, Calls, SMS, MMS)
NFC
Camera
Bluetooth
GPS
All Sensors
- STEPS FOR INSTALLING GSIs:
Download the desired GSI (it MUST be A-only_arm64 Variant)
unpack it if it wasn't in .IMG format
Go to TWRP , Install , Install IMAGE
Pick your GSI and select SYSTEM IMAGE
Reboot to TWRP Recovery
Flash "GSI_Fix_boot.zip"
- STEPS FOR INSTALLING GAPPS
Download the appropriate OpenGapps.org
Go to TWRP , Install
Pick your OpenGapps.zip
Reboot to System
- FOR INSTALLING FIXES:
Camera Fix (Flash only on NON Working GSIs)
- KNOWN BUGS:
Fingerprint
Bluetooth calls are broken
No Network bars (Calls/data works)
May be more, Let me know
Downloads. F.A.Qs below
XDA:DevDB Information
Guide on How to flash GSI, ROM for the Samsung Galaxy M20
Contributors
prashantp01
ROM OS Version: 9.x Pie
ROM Kernel: Linux 4.x
Version Information
Status: Testing
Current Stable Version: v1
Created 2019-03-05
Last Updated 2019-03-05

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Come hang with us on our chat : Telegram
----------------------------------------------------------------
Generic System Image (GSI) : Github
Treble folder : Gdrive
---------------------------------------------------------------
Bugs :
1- some users might face SDCard issues
If you did , back up its data and format it in GSI.
2- If you face "Error 70: Insufficient storage space available in the system partition" while flashing Gapps
If you get do this : Wipe > Advanced Wipe > select system > Repair or Change File System > Resize File System
Go back and flash Gapps

amazing.

Awesome Bro. Nic work. Keep it up.

VoLTE is not working

harsinghal said:
VoLTE is not working
Click to expand...
Click to collapse
It will not work on any gsi

It work with m205fn?

kofa01 said:
It work with m205fn?
Click to expand...
Click to collapse
yes, it should work

prashantp01 said:
yes, it should work
Click to expand...
Click to collapse
it doesn't work, in TWRP i pres flash img and chosse system.img GSI but TWRP failed with errot 255...
maybe i doing wrong?

kofa01 said:
it doesn't work, in TWRP i pres flash img and chosse system.img GSI but TWRP failed with errot 255...
maybe i doing wrong?
Click to expand...
Click to collapse
On which gsi?

prashantp01 said:
On which gsi?
Click to expand...
Click to collapse
This is a problem with ROM. I tried to put the Pixel Experience, it started without problems.
But not work NFC.
On which ROM the NFC will work?

kofa01 said:
This is a problem with ROM. I tried to put the Pixel Experience, it started without problems.
But not work NFC.
On which ROM the NFC will work?
Click to expand...
Click to collapse
report it to pixel experience developer, with proper logs

T
This work on sm-m205g ?

isnu harajuku said:
This work on sm-m205g ?
Click to expand...
Click to collapse
yes it should work

AOSP and treble both did not work in the m205f version. It gets stuck in blootloder

My phone is stuck in boot screen after flashing the rom, can someone help me fix this issue? I flashed Phh-Treble 9.0
My phone model No. M205F

lifehacker03 said:
AOSP and treble both did not work in the m205f version. It gets stuck in blootloder
Click to expand...
Click to collapse
your M20 is already a trebled device
rafsun.khan said:
My phone is stuck in boot screen after flashing the rom, can someone help me fix this issue? I flashed Phh-Treble 9.0
My phone model No. M205F
Click to expand...
Click to collapse
take logcats and report to phh-treble developer

prashantp01 said:
take logcats and report to phh-treble developer
Click to expand...
Click to collapse
Any guide to get a logcat when the device is stuck at the android boot logo? Nothing shows up when I "adb devices" from PC.

Thanks but its official update original for m20
I'm mean wait to comes out the originally Android 9...
Or not coming.
Or update This Help me

Did someone sucsessfully install gsi rom on m20 ?
I tryed a couple of roms, allways bootloop

[CLOSED][Recovery] TWRP (pyxis) - Official 3.3.1-0 (final)

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Team Win Recovery Project (TWRP) is an open-source software custom recovery image for Android-based devices. It provides a touchscreen-enabled interface that allows users to install third-party firmware and back up the current system, functions often unsupported by stock recovery images. It is, therefore, often installed when rooting Android devices, although it isn't dependent on a device being rooted to be installed.
******************************************​
Hi there,
This is the official build (beta) based on TWRP sources and xiaomi blobs ... fully working !
(Mi 9 Lite / Mi CC9)
!!! IT'S NOT MY PROBLEM, IF YOU DON'T READ AND FOLLOW MY INSTRUCTION CAREFULLY, IF YOU DON'T HAVE TIME FOR THIS, OR IF YOU FLASH SOMETHING OR DO A MANIPULATION I DIDN'T MENTION HERE !!!
THIS RECOVERY DOESN'T SUPPORT ANY ZIP MOD/ROM THAT DOESN'T USE SYSTEM_ROOT MOUNT. CHECK OFFICIAL TWRP HOMEPAGE FOR MORE INFORMATION ABOUT NEW A/B DEVICES FROM 2019​
Installation Procedure (first time) :
- Unlock your bootloader D)
- Enable ADB from your Official MIUI Developer option
- Plug your USB cable to your Windows PC and type :
adb reboot bootloader
- type then :
fastboot flash recovery twrp-3.3.1-0-pyxis-final (auto-decrypt).img (rename your image just by twrp.img)
fastboot flash vbmeta vbmeta.img
fastboot reboot (keep Vol+ pressed until you see TWRP splash)
- Wait for decrypting ... (if already you set a lockscreen pattern or a fingerprint)
- Format Data (button on the right) + Type "yes" on the keyboard popup
- Reboot
- To boot TWRP from MIUI : reboot menu + keep Volume UP pressed.
- To boot from phone off : power button + Volume UP
TWRP can now auto-decrypt your crypted /data partition so you can make backup with no issue.
This is a big fix that prevent to loose your fingerprint and pattern ...
For MIUI users, you must flash the fstab.zip fix after flashing your MIUI rom !!!
Enjoy ! :good:
Update : 2019-11-05
-version : 3.3.1-0
-busybox update
-terminal fixed
-stable and optimized : setting lockscreen pattern and fingerprint on the first boot is no longer needed !
BE SURE WHEN YOU WIPE YOUR DATA, YOU KEEP THE "4 FOLDERS BELOW + .layout_version". THESE ARE YOU ENCRYPTION DATA. IF YOU DELETE THEM, YOU WILL NOT BE ABLE TO RESTORE YOUR DATA BACKUP UNTIL YOU FORMAT YOUR DATA AGAIN.
TRICK TO SAVE YOUR LIFE : ALWAYS KEEP YOUR BACKUPS ON THE EXTERNAL STORAGE !!!
Download
link
XDA : DevDB Information
TWRP, Tool/Utility for the Mi 9 Lite / Mi CC9 (pyxis)
Contributors
gringo80
Source Code 1 : https://github.com/TeamWin
Source Code 2 : Prebuilt Recovery Kernel from MIUI
Version Information
Status : Stable
Release Date : 2019-11-05

Any screenshot?

Thank you for the contribution, is it required to flash the zip to prevent encryption after each rom flash ??

j0an said:
Thank you for the contribution, is it required to flash the zip to prevent encryption after each rom flash ??
Click to expand...
Click to collapse
To prevent encryption, go to twrp homescreen and choose "format data" and type "yes"... but before that, make your data backup on the external-sd ! (the first thing i do on all my devices)

Please use the official beta build !
:good:

gringo80 said:
Please use the official beta build !
:good:
Click to expand...
Click to collapse
Where's the download link? Maybe I'm blind....

oieNao said:
Where's the download link? Maybe I'm blind....
Click to expand...
Click to collapse
Update : vbmeta Fix is available (the patch is no longer needed)
Please download the latest build from 2019-10-27 (11:25:55) . This is the final build.
Read the OP !

Awesome.
Will you bring more goodness to our device, like custom roms?
Sent from my MI 9 Lite using Tapatalk

tiagorodrigueez said:
Awesome.
Will you bring more goodness to our device, like custom roms?
Sent from my MI 9 Lite using Tapatalk
Click to expand...
Click to collapse
I'm working on a GSI patch. The builds (AOSP-PixelExperience-LineageOS) boot but stuck on bootanimation.
For information, our device is treble ready : so the builds to use are arm64-ab (yes ab not aonly) !

Also suitable for the Mi 9 Lite?

gringo80 said:
Update : vbmeta Fix is available (the patch is no longer needed)
Please download the latest build from 2019-10-27 (11:25:55) . This is the final build.
Read the OP !
Click to expand...
Click to collapse
what is the vbmeta.img file? never encountered something like this in other phones

mikdo said:
Also suitable for the Mi 9 Lite?
Click to expand...
Click to collapse
yes, i have the mi 9 lite !

sorry for noob question, but what happen if I don't format data after flashed twrp?

gringo80 said:
I'm working on a GSI patch. The builds (AOSP-PixelExperience-LineageOS) boot but stuck on bootanimation.
For information, our device is treble ready : so the builds to use are arm64-ab (yes ab not aonly) !
Click to expand...
Click to collapse
It's a surprise to be ABdevice. Some people on our telegram group already tested havoc builds and booted but had some bugs on 4g and offline charging.
Sent from my MI 9 Lite using Tapatalk

holymoz said:
what is the vbmeta.img file? never encountered something like this in other phones
Click to expand...
Click to collapse
vbmeta means verified boot signature. the vbmeta.img provided here bypass this verification !

tiagorodrigueez said:
It's a surprise to be ABdevice. Some people on our telegram group already tested havoc builds and booted but had some bugs on 4g and offline charging.
Sent from my MI 9 Lite using Tapatalk
Click to expand...
Click to collapse
It depends on the kernel used. You can modify the kernel as you want to make it aonly or A/B. Here, the stock kernel provided by xiaomi is for A/B buils. That's it ! I want to make a patch so to keep the stock kernel untouched ! (Modded kernels are never perfect)

When i flash the recovery, i am stuck at the twrp boot image. What to do?

jbsabado28 said:
When i flash the recovery, i am stuck at the twrp boot image. What to do?
Click to expand...
Click to collapse
download the last build and flash vbmeta
(OP)

holymoz said:
sorry for noob question, but what happen if I don't format data after flashed twrp?
Click to expand...
Click to collapse
you can't access to the internal storage content. better to decrypt by formatting data !

tiagorodrigueez said:
It's a surprise to be ABdevice. Some people on our telegram group already tested havoc builds and booted but had some bugs on 4g and offline charging.
Click to expand...
Click to collapse
please send the link on pm
---------- Post added at 11:33 PM ---------- Previous post was at 11:30 PM ----------
gringo80 said:
I'm working on a GSI patch. The builds (AOSP-PixelExperience-LineageOS) boot but stuck on bootanimation.
For information, our device is treble ready : so the builds to use are arm64-ab (yes ab not aonly) !
Click to expand...
Click to collapse
Its sad that they didnt boot... Cant wait to see some rom's working treble or not

[ROM][05/20][11.0] Yet another AOSP project [OP7P][STABLE]

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YAAP is a project founded by Adhitya Mohan (@poad42) and Ido Ben-Hur (@idoybh) with the goal of staying close to AOSP in design goals, offer a clean interface, do as much as original development as possible and avoid becoming a kitchen sink and cherry picked mess.
Bug reporting:
DO NOT Report bugs if you're running a custom kernel or you installed Xposed
Grab a logcat right after the problem has occurred. (Please include at least a few pages of the log, not just the last few lines, unless you know what you're doing.)
If it is a random reboot, grab dmesg . (Do not bother getting a logcat unless you can get it just before the reboot. A logcat after a reboot is useless)
If the problem disappears after running "setenforce 0" from a root shell, grab /data/misc/audit/audit.log
Remember to provide as much info as possible. The more info you provide, the more likely that the bug will be solved. Please also do not report known issues.
Downloads
Guacamole (OP7P): Download Link | Google Drive | SHA256SUM
Follow us on Telegram for updates and faster(?) responses
Chat
Updates
Flashing Procedure:
Through fastboot:
Dump the ROM zipfile through payload_dumper
Reboot to bootloader
Flash each partition (be sure to open the terminal window in the folder you extracted the payload):
```fastboot flash boot boot.img```
*if you never formatted to f2fs reboot to recovery and format
```fastboot flash dtbo dtbo.img
fastboot flash odm odm.img
fastboot flash system system.img
fastboot flash vbmeta vbmeta.img
fastboot flash vendor vendor.img```
Reboot to system
XDA:DevDB Information
Yet Another AOSP Project, ROM for the OnePlus 7 Pro
Contributors
OmkarTheAndroid, idoybh, poad42
Source Code: https://github.com/yaap
ROM OS Version: Android 11
ROM Kernel: Linux 4.14.x
ROM Firmware : OOS 11 Global Stable
Based On: AOSP
Version Information
Status: Stable
Created 2020-10-14
Last Updated 2021-04-20

Changelog:
ROM:
• Improve volume dialog code & fix the expand animation
• Simplify OpenDelta auto download network option
• Make emergency tile in powermenu look better
• Swipe down to expand statusbar in Launcher3
• Add an option to choose primary overlay (bg dark color)
• Many minor visual fixes in settings (and other minor changes)
• Merged latest CAF tags wherever relevant
• Bug fixes in recovery
• Updated some APNs
• Some other minor changes
Device:
• Update FOD zOrder
• Optimize native executables for Cortex-A76 CPU
• Re-introduce cleaned up raise to wake implementation
• Add Wake Device Action to off screen gestures
• Cleanup/update more blobs

NOTE: You must clean flash and format data/internal storage to f2fs.
Custom kernels will need to explicitly support YAAP for new userdata changes.
Steps to go enable Widevine L1 on custom ROMs :-
• Flash OOS 11 stable or any build from OB3 and above
• Flash magisk and enable magisk hide
• Reboot
• Verify if you have L1 working using app like drm info
• Local upgrade OOS 11 stable or any build from OB3 and above
• Reboot
• Verify if you have L1 working using app like drm info
• Flash custom ROM and you should have L1 there as well
Note: you only need to do this once

Noice

Been using test builds from the TG group for almost 2 weeks now and this rom is fantastic!
Sent from my OnePlus7Pro using XDA Labs

Gapps included?

Hello zot tout!
Any screenshots are possible please?
Best regards

Kaldun13 said:
Gapps included?
Click to expand...
Click to collapse
Yes
Sent from my OnePlus7Pro using XDA Labs

Kaldun13 said:
Gapps included?
Click to expand...
Click to collapse
yep

nico97470 said:
Hello zot tout!
Any screenshots are possible please?
Best regards
Click to expand...
Click to collapse
present in the screenshots section

OmkarTheAndroid said:
present in the screenshots section
Click to expand...
Click to collapse
Sorry, but I don't see where it is?!
Envoyé de mon OnePlus 7 Pro en utilisant Tapatalk
ÉDIT : SEEN

nico97470 said:
Sorry, but I don't see where it is?!
Envoyé de mon OnePlus 7 Pro en utilisant Tapatalk
ÉDIT : SEEN
Click to expand...
Click to collapse
it the 2nd tab, here https://forum.xda-developers.com/devdb/project/?id=42725#screenshots

Android 11 Magisk Root
I have tested it and it works, don't install Magisk Manager, if you have one installed, remove it, the zip already have a mudded one. Boot TWRP and flash the Magisk A11.zip file as usual
Please hit the like button if I was able to help

nkhater said:
I have tested it and it works, don't install Magisk Manager, if you have one installed, remove it, the zip already have a mudded one. Boot TWRP and flash the Magisk A11.zip file as usual
Please hit the like button if I was able to help
Click to expand...
Click to collapse
I have flashed the same but I can't hide the magisk .. it trying to download then says "Failed to hide magisk"

I have installed the rom and it's working great. Magisk, youtube vanced, viper4android, everything working fine.
The only issue I have found is launchers crash all the time. I use Nova or Lawchair 2.1 and they keep crashing.
Anyone experiencing this issue?

NFC working?

Can this Rom be dirty flashed on top of OOS without losing data or having bootloop????
I am on stable OOS,rooted, twrp and encrypted...

kpmohamedhussain said:
Can this Rom be dirty flashed on top of OOS without losing data or having bootloop????
I am on stable OOS,rooted, twrp and encrypted...
Click to expand...
Click to collapse
No. As with any Stock Rom, you must format your data

ImjustSaiyan92 said:
No. As with any Stock Rom, you must format your data
Click to expand...
Click to collapse
But its mentioned in OP about dirty flash

kpmohamedhussain said:
But its mentioned in OP about dirty flash
Click to expand...
Click to collapse
If you noticed it also said clean flash if you are coming from any other ROM

[ROM][BETA][UNOFFICAL] LineageOS 18.1 for Xiaomi Qin F21s Pro By A.I.V

based on Andyyan LineageOS.
download (v1-alpha)
LineageOS 18.1 QinF21sPro alpha v1 by A.I.V.7z
drive.google.com
how to flash?
1. Unlock bootloader with mtkclient
2. Extract the 7zip file
3. Flash with SP Flash Tool
Important Note: You must to flash all the ROM. If consultance only super + userdata or any other part, it will not work. But, because it should flash all the ROM - but, it locks the bootloader ...
4. Re unlock bootloader with mtkclient
5. flash empaty vbmeta
Known Bugs:
1. Most of functions need to use with touch screen
(You can install qinpad to type with hardware keys)
2. System is read-only.
I packed the super.img as read-write, but it did not work
3. No access to partition / DATA by Twrp
4. Backlight always on the keys (thanks to gaugga from 4pda)
5. can't get files via Bluetooth It works. Sorry for the eror
6. can't use Bluetooth headphones
7. can't use headphones (to patch headphons
Phh settings > Misc > Use alternate way to detect headsets
and reboot. thanks to zerovoid and il.mikha98 from 4pda)
-----UPDATE V2-alpha------
changelog
1. you not need to re unlock bootloader after flashing
2. system as RW
3. A much better support in hardware keypad
4. add to system qinpad english-russian and qinpad english-hebrow and KeyboardSwticher app. (this apps is Open Source)
download
‏‏LineageOS V2.7z
drive.google.com
----update v3-BETA 1------
LineageOS 18.1 v3 (beta1) by A.I.V-patched.7z
7Z File
1drv.ms
LineageOS 18.1 for Qin F21 PRO by A.I.V
fix bugs in v3:
1. headset working
2. bluetooth headset working
known bugs:
1. Bluetooth and wifi work by default.
after flashing, you need to turn off them.(you can to turn on them after this)
2. backlight always on
3. no access to /DATA partition by Twrp
enjoy!
sorry on my bad english.
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}
note: i share FW for 64GB. if you have 32GB, you need to replace userdata and edit scatter.

to set QinPad as default keyboard, use this app
Keyboard Switcher 2.2.apk
drive.google.com

is F21s Pro diffrent from F21 Pro? can you make TWRP flashable?

EDIT: I resolved this error by simply check a guide for SP Flash Tools. The required file was MTK_AllInOne_DA.bin
Thank you for the guide.
I'm stuck at point 3, when I try to flash the phone with SP Flash Tools, I need to add the Download-Agent file in order to proceed. I used all the .bin files in the rom folder but none of them work.
Could you please advise?
Thanks

Hi,
I successfully flashed the phone with the firmware LOS18.1-QJIN-F21PRO as the one attached failed during the flash process. My phone is the 3/32GB version.
I have two problems:
1) I tried to lock the bootloader (for security reason) but the phone never starter. (I imagine that cannot be possible)
2) The keypad light is always on, is there a way to turn it off while the screen is off? Which application/setting is controlling this function? I might be able to help
Overall the system is pretty stable, my next step is to install the MicroG. Any advice on this?
Thank you

f21s Pro is F21 Pro. it is the same thing.
TWRP brought in 4PDA (Thankful to @ Hagai that brought it in Mitamchim top - the Israeli forum). flash it as boot_a.
twrp.img
drive.google.com
What is LOS18.1-QJIN-F21PRO? This LOS for 32GB from 4PDA? It is based on my ROM.
You can not lock bootloader After Flashing ROM
Light in the keys? It's a well-known bug (number 4)
I now work on repairs, for example better support in hardware keypad.
​

Update: I managed to flash and access TWRP, but not able to find the MicroG zip file saved in the phone.
Hi,
Yes, I took the LOS18.1-QJIN-F21PRO from the 4PDA forum (I don't speak Russian).
I will try to flash microG through TWRP (thank you for providing it)
How would I access the TWRP on the F21pro? Is it sufficient to boot the phone with volume down (#/camera button) pressed?
Many thanks

is volte working in this rom? thanks a lot.

update v2 - see orginal post

a9381 said:
update v2 - see orginal post
Click to expand...
Click to collapse
Thanks again for your excellent work!
I noticed that the phone boots with the Orange State warning (bootloader unlocked). Apart from this, I didn't notice any other problem

to patch haedphons
Phh settings > Misc > Use alternate way to detect headsets
and reboot. thanks to zerovoid and il.mikha98 from 4pda

very cool! tyvm, will keep this topic on my watch list!

To make a version with Gapps?

Thank you for this! Any plans to upload the source? Would like to build this myself.

a9381 said:
To make a version with Gapps?
Click to expand...
Click to collapse
Instead of Gapps, MicroG would be awesome and less invasive (and easy to implement).
Please keep Lineageos clean and in the worst-case scenario, the user will install MicroG or Gapps separately.

ok.
i fix the bluetooth headset problem...
in the next version, w.g.h.

Can anyone confirm volte is working on v2? Thanks a lot

update v3
OneDrive
onedrive.live.com
LineageOS 18.1 for Qin F21 PRO by A.I.V
fix bugs in v3:
1. headset working
2. bluetooth headset working
known bugs:
1. Bluetooth and wifi work by default.
after flashing, you need to turn off them.(you can to turn on them after this)
2. backlight always on
3. no access to /DATA partition by Twrp
enjoy!

update v3-BETA 1

a9381 said:
update v3
OneDrive
onedrive.live.com
LineageOS 18.1 for Qin F21 PRO by A.I.V
fix bugs in v3:
1. headset working
2. bluetooth headset working
known bugs:
1. Bluetooth and wifi work by default.
after flashing, you need to turn off them.(you can to turn on them after this)
2. backlight always on
3. no access to /DATA partition by Twrp
enjoy!
Click to expand...
Click to collapse
Thanks for your work. can you confirm VOLTE works on this rom? If not will it be fix? Congrats its now on BETA.

Doogee N20 - Some phones are just hard to modify

After finally unlocking the bootloader, installed TWRP 3.6.0 and rotted with Magisk v23.0. Lets find a custom ROM that suits this phone - WRONG!
I have tried many types of ROM and so far it ends in soft brick. Need advise if you have any. My aim is to install a basic custom ROM , install pico or nano GAPP, and only install like 4 apps on it. phone, sms, navigation, music player etc.
I have tried the following ROM:
Phhusson-treble AOSP andriod version 9, 11 & 12.
GSI arm64 ab ROM
a so call stock ROM
I also tried installing the vendor.img as described here
I would like to use LineageOS but there doesn't seem to be one for this phone
I am now resorting to installing the stock firmware to make the phone work again, instruction here
If anyone has sucessfully rooted this phone using a basic ROM and GAPP please share how you did it and where your download was.

Why did phhuson fail ? That's the basic gsi, every other gsi are build on top of that. If that doesn't work, nothing will.

Fytdyh said:
Why did phhuson fail ? That's the basic gsi, every other gsi are build on top of that. If that doesn't work, nothing will.
Click to expand...
Click to collapse
I install - system-arm64 –ab
I did some research that the Doogee n20 is a arm64 and a+b .... Unless I got the wrong information.
I suspect there maybe some stock firmware files that needs to be installed as well to make it work properly.
A post said it needs vendor.img, I might try sourcing another copy.
Follow up - I got it un-bricked with the stock firmware (android 9) (link in my original post) .... Back to square one .

jackjack1885 said:
I install - system-arm64 –ab
I did some research that the Doogee n20 is a arm64 and a+b .... Unless I got the wrong information.
I suspect there maybe some stock firmware files that needs to be installed as well to make it work properly.
A post said it needs vendor.img, I might try sourcing another copy.
Follow up - I got it un-bricked with the stock firmware (android 9) (link in my original post) .... Back to square one .
Click to expand...
Click to collapse
Search treble info, it will tell you exactly any treble related information.

Fytdyh said:
Search treble info, it will tell you exactly any treble related information.
Click to expand...
Click to collapse
Many thanks, didn't do that step.
Did it now, it shows it needs system-arm64-ab
I got the right one. Not sure about the VNDK 28.0 doesn't really say on the webpage.
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Tried android 9 (the phones original version) 11, and 12..... No luck.

follow advices from this https://forum.xda-developers.com/t/doogee-n20-twrp.4136331/
and this https://forum.xda-developers.com/t/...loop-after-any-custom-rom-doogee-n20.4357313/

Hey man, did you get it fixed?
Actually this device is A-only, but you should use Gsis A/B.
Most Phh based Gsi works almost perfectly for me.
You can try this:
- Download and install Twrp 3.6.1 here
- Download LineageOS 18.1 (lir) here Choose "arm64 bvZ" version
- Download stock rom here or Y9Plus variant here
- Extract the Gsi, and the vendor image from the stock rom
- I restarted in Twrp, go to wipe and select system, data, cache...
- Go install and flash the Gsi as system image, and vendor as vendor image
-reboot

AtS17 said:
Hey man, did you get it fixed?
Actually this device is A-only, but you should use Gsis A/B.
Most Phh based Gsi works almost perfectly for me.
You can try this:
- Download and install Twrp 3.6.1 here
- Download LineageOS 18.1 (lir) here Choose "arm64 bvZ" version
- Download stock rom here or Y9Plus variant here
- Extract the Gsi, and the vendor image from the stock rom
- I restarted in Twrp, go to wipe and select system, data, cache...
- Go install and flash the Gsi as system image, and vendor as vendor image
-reboot
Click to expand...
Click to collapse
Thanks for the links!
Are you able to add this old firmware please? https://cloud.mail.ru/public/mCzU/5PX4cKPfH
I can't download it, i found it on 4pda (Mod Action: Link removed)
I'm trying to delete the red "TEE key not write" message.