Samsung Galaxy S21 Plus (Snapdragon)

Steps to install

THIS WILL ERASE ALL YOUR DATA
AND VOID YOUR WARRENTY
AND OBVIOUSLY TRIP KNOX (NO SECURE FOLDER, NO SAMSUNG PASS)

Unlock Bootloader

• Enable OEM unlocking and USB Debugging in developer settings
• Turn Off Your Device
• Boot into Download Mode (Press Up and Down Volume when Powered Off and Connect Cable to a Computer)
• Long Press Volume Up to Unlock Bootloader

Install TWRP

• Download Required files
  • TWRP Images:
    SM-G996B, SM-G996BN
    SM-G9960, SM-G996U, SM-G996U1, SM-G996W
  • VBmeta Verification Disabler
    All varients
• Boot into Download Mode Again
• Open Odin3 (If you don't have Odin, get it from OdinDownload) (Recommend v13)
• Put TWRP tar into AP, and VBmeta tar into USERDATA
• Press Start
• Boot back into One UI and Reboot into Recovery with adb reboot recovery
  • ADB; install latest command-line tools for your system
  • Samsung Android USB Driver
• Navigate to Advanced -> Terminal; enter multidisabler

Installing GSI (through TWRP)

• Wipe data
• Factory Reset
• Clear Data + Cache + Dalvik/ART Cache
• Navigate to Advanced -> Terminal; enter multidisabler
• Reboot to Recovery Again
• Push the img image from your computer to the device
• Flash it as a System Image
• Reboot

Brightness

• Go to Phh Treble Settings
• Select Samsung Features
• Press Set backlight scale/max backlight level
• Type -1 in the dialog and press OK and adjust the screen brightness on your phone

Screen flickers

• Go to Phh Treble Settings
• Select Samsung features
• Enable option Enable workaround for white-ish screen
• Go back and select Misc features
• Enable option Disable HW overlays

Enable Always-on-display

• Go to Phh Treble Settings
• Select Misc features
• Enable option Force allow Always-On-Display

Hardware support

Component	Status
Camera	√
Speaker / Mic	√
Bluetooth	√
WiFi	√
SIM / Mobile Data / Voice	√
Brightness	*(Display is dimmed; Fix provided here)

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@litszwaiboris - 2024/05/20