Samsung Galaxy A12s (Exynos 850) - phhusson/treble_experimentations GitHub Wiki

Installing GSI on a Samsung Galaxy A12s (Exynos)

Here is what you need:

  • Super Patch
  • Termux APK
  • Samsung A12 Exynos Firmware AP
  • A capable ARM64 Android Device with 8 cores and 4GB of RAM
  • Magisk Kitsuned Device (Previously called Magisk Delta) - This is important to not loop back to download
  • A reliable Internet and data cable
  • Trusty ODIN ready to work
  • Physwizz TWRP v5 (For U9, UA, and UB devices) which you can get it on telegram, also for older ones, go to Exynos 850 Development and Testing Group
  • ZArchiver on Google Play
  • Laptop that has Intel Core or AMD Athlon or Ryzen (Celeron, Pentium, and Intel N works, but ill label them unreliable to handle multitasks and processing)
  • GSI with VNDKLITE (for Zygisk)
  • Device with Physwizz Kernel (Enforce/Permissive) (if you want to install Android 14 GSI or Later, or else some features may break)

Explaination

We are attempting to patch super file to install GSI, as doing the TWRP way wont work, fastbootd only works on a very few select handsets, some were successful at installing using fastbootd but few lost their IMEI

WARNING!!!

If you have successfully installed a GSI, DO NOT INTERACT WITH PHH TREBLE SETTINGS, It can cause bootloops, so even if there's no sensor support on the GSI or even VoLTE issue, DO NOT INTERACT WITH PHH Treble Settings, just go download mode and flash another GSI, best to check the Charts below about issues and problems of GSI that works in this particular unit

Instructions

A. Patch

  1. First copy this code snippet
cd ~ && apt update && apt upgrade && apt update && apt install git curl dialog -y && git clone https://github.com/SUFandom/super-patch
  1. Elevate Permissions of the script to executable and run
cd super-patch && chmod +x *.sh && ./builder.sh

  1. There will be some initialization, after that a disclaimer may pop up, read it and press sure

  2. This is the menu were working with it, remember your Target dir

image

The target dir mentions where the building takes place, the screenshot sample just shows the WSL directory, for android it would be /data/data/com.termux/files/home/storage/image_build which basically means your /storage/emulated/0/image_build (Right now, running my script in WSL is not recommended temporarily)

  1. Copy the super.img.lz4 from your magisked AP to the image_build dir in /storage/emulated/0

  2. Head to Extract AP/Super then you will see this menu

alt

Select Extract Super

  1. After that, you are prompted to select where is the GSI you want to install, ignore that because its still has bugs temporarily, wait for the next few updates, just go back

  2. On Zarchiver, head to image_build, then delete system.img and product.img, those two contains OneUI files so to actually make the GSI working, those two needs to be gone

  3. After that extract the GSI thats proven to work, table very below in this wiki

  4. Rename the img to system on the image build dir

  5. Go back to termux, then go Build Super

img

  1. then select build, then select sure

  2. Wait for it to finish

  3. The script may prompt you to rename the file, go ahead and name it, but do not add spaces and do not add extensions

img

  1. After that , the super tar is ready

B. Flashing it

  1. Copy the file tar from image build dir to the PC

  2. Ready the ODIN and some Magisked AP just in case

2.1 If your device isnt loaded with TWRP, i suggest do that first, head to the telegram group

  1. Mount the custom super file to AP on ODIN with Auto reboot disabled (IMPORTANT) and NAND erase enabled (ALSO EXTREMELY IMPORTANT)

  2. Set device to download mode and plug the device to the PC

  3. Start! and wait odin to say PASS!

  4. after ODIN says pass!, hold vol down and power to reboot to recovery, it may bootloop once and thats normal

TWRP

  1. After its done bootlooping, go TWRP main menu > Wipe > Data > change file system > ext4 > then reboot to recovery

2.1. after that Main menu > Advanced > Terminal > type multidisabler twice > reboot to recovery > main menu > wipe > change file system of data > set to f2fs > reboot to recovery again (to disable FBE, but if you want FBE, read 2.2)

2.2. after that Main menu > Wipe > Data > change file system > f2fs > reboot to recovery

  1. After that wipe Dalvik cache and /cache then reboot to system

AND THERE YOU HAVE IT!

Problems

If you have issues, talk to us: https://t.me/a12schat

Supported GSIs for A12 Exynos

Table Updated: March 10, 2024 3:20AM : GMT 8+

GSI's Barely works with basic use cases With Zygisk Running Hardware/Software issues/features Performance Kernel Recommendations
Lineage Light 20 Gapps and non-Gapps ✔️ ✔️ Call intercept not working (which means you cant receive calls)

Fix: Set this on build prop: persist.vendor.audio.fluence.voicecall to either true or false


Only One camera Main module works


Android Not certified warning, Fix is to certify it here: https://google.com/android/uncertified 		War Thunder Mobile Reaching 40-60FPS (Low Graphics)


Genshin at 30-40 fps Low Graphics (stock usually at 20)

Blue Archive at 60FPS With Anti-alias		 Either stock or Physwizz Kernel
Pixel Experience Plus and Non plus (VNDK and VNDKLITE) by ponces ✔️ ❌ - will cause bootloops Any zygisk enabled kills GSI to bootloop

Only one camera main module works

Any minimal interaction with phh settings or just barely navigating also bootloops

Audio Volume is weak, Configurations are located at phh settings but also bootloops, suggest download Flat Equalizer: https://play.google.com/store/apps/details?id=com.jazibkhan.equalizer&hl=en&gl=US (Works 99% all apps + NO ROOT Required) just turn loudness on and set value or Grab ViperFX, install modules and apk, then turn on master and raise the output limit (May not work on other apps)		 Takt Op. Symphony Surf around 21-25 FPS at Max


Genshin at 28-35 fps


War Thunder Mobile only 32-44 (Low Graphics)		 Physwizz Kernel
Derpfest Android 14 ✔️ ✔️ CPU Util while on energy_step is laggy ( Fix is to set CPU Freq. Minimum at 546, or set CPU Governor at schedutil, performance is okay but its better to set it to schedutil for battery)

2 out of 4 Camera (wide angle, main) works except macro and B/W

Fingerprint scans way too sensitive

Any Minimal Interaction with phh settings or just barely navigating also bootloops

Unnecessary wakes, fix is disable waking gesture ( This was enabled by default)

Volume bar goes in the middle of the screen, fix is to just rotate screen, this event is rare so not much of a problem

Vietnam A12 Exynos Devices reported to have lost their IMEI, potentially due to A2DP, solution is to change to physwizz kernel

Device will name itself Google TrebleDroid (Generic GSI Label) instead of samsung SM-A127F 		Takt Op. Symphony hits around 39FPS low, in battle somehow, it drops to 12 fps low (Vulkan Issue)

Genshin Impact untested yet

War Thunder Mobile surfs around 33-46 (Low graphics)

Baseball 9 - 43-60FPS		 Physwizz Kernel
Miku UI 14 ✔️ ✔️ Animation makes the UI feel laggy, fix is to turn on Dev Ops at the second part of Main Settings menu > Go way down then tap Build N., then go to the Animation, set to 1x all

There may be some hidden SU tools that i couldn't find (but found by magisk) so i would not recommend to daily drive on since idk what tools also preinstalled hidden		 NO DATA (SOMEONE CAN SUBMIT WITH VIDEO EVIDENCE) Stock or Physwizz Kernel
PixelOS 13 ❌ ❌ DIDNT WORK, STUCK AT BOOT, GSI PROBLEM NO DATA NO DATA
cRDROID 13 ❌ ❌ BOOTLOOPING NO DATA NO DATA
PixelOS 14 ✔️ ✔️ Phh Settings Bootloops device

Only One camera main module works

Proper Device Brand Detection, Reports samsung SM-A127F instead of generic trebledroid

no face biometric		 Genshin Impact:
22 FPS Avg - LOW, Bloom off, No AA, No fancy stuff.

Blue Archive:
58 FPS Avg - ALL settings maxed

Takt Op. Symphony
40 FPS Avg - High Frame rate mode + Low

War Thunder:
28 FPS - Low, set to 60 fps cap		 Physwizz Kernel
Evolution X (14) ✔️ ✔️ Phh Settings Bootloops device

Bugs from DerpFest 14 about volume still persists, but in the left now

It has a HyperV samsung, so that means you can do freeform windows

The CPU info may report XXXXX Degrees celsius, activate the Show CPU info on Settings > The Evolver > Misc > Scroll down > Show CPU info

Fingerprint and facial works

Only one out of 4 camera modules are usable, you cant do wide lens nor HDR Properly

IMEI reportedly wont work on Syrian A12s
Fix: Wipe /data and install physwizz U9 Kernel for A12s

Device will name itself Google TrebleDroid (Generic GSI Label) instead of samsung SM-A127F 		War Thunder at 40-60fps

Genshin Impact - 21 FPS to 38 FPS (Low, Non TAA, No Bloom, Low Crowd) , 15-27FPS (Medium, TAA, Bloom, Low Crowd)

Takt Op. Symphony - TBA

Blue Archive - TBA		 Physwizz Kernel
cRDroid 14 ✔️ ✔️ Phh settings bootloops device

Face unlock works

2 out of 4 back cam sensor works		 Genshin Impact - Avg: 22-38FPS - All settings low, except FPS, set to 60

War Thunder - Avg 45FPS-60FPS - Low, set FPS to 120 (Force)		 Physwizz Kernel
Project Elixir ❌ ❌ DIDN'T WORK, GSI PROBLEM, STUCK AT BOOT NO DATA NO DATA
Superior OS ❌ - Went back to TWRP ❌ Did not boot, stuck at TWRP NDA NDA
Horizon Droid (Initial Release) ✔️ ✔️ You cannot disable Duplicate accounts.

Assistant can't be updated

One out of 4 Cameras are only working		 Genshin Impact:

Avg: 17-26 FPS - Settings at Low (not very low, FPS set 60, no AA)

War Thunder: 31FPS High Resolution, Low Graphics Detail		 Physwizz Kernel

Prebuilt Super Images

Here are prebuilt images that will work on Exynos 850 A127 UA (128GB, 4GB RAM)

https://terabox.com/s/1kHhDYta9zdd8IwhwvmkxuA

Always remember:

  • Most GSI may not work unlike other android devices
  • If you did the steps right and still not booted, its a GSI problem
  • There may be split archives in the host link, download all 7z files to extract super tarfile
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