Samsung Galaxy M31 (SM-M315F)

Summary of what works and doesn't.

Installation guide

• Fastboot installation is tested and works.

Flashing guide using Fastboot.

Enable USB debugging. Reboot your device into Fastbootd if your recovery supports it:

$ adb reboot bootloader
$ fastboot reboot fastboot

or:

$ adb reboot fastboot

Now flash the GSI image you downloaded:

$ fastboot flash system /path/to/file.img

If you're on Linux or macOS, use sudo fastboot.

Flashing guide using TWRP

If you're on Android 11, download TWRP using this link. If you're on Android 12, use the TWRP provided by this Telegram group. You will need to flash a nulled vbmeta before flashing the Android 12 TWRP!

• Enter TWRP recovery.
• Do a clean flash if you're not upgrading a GSI version. To do that: Wipe > Dalvik/ART Cache, Data, Cache. If you have already installed a GSI, you don't need to wipe Data (unless it's an Android update).
• Start installing: Install > Install Image > nameofthegsi.img > System Image > Swipe to confirm Flash.
• Enjoy!

Hardware support

Component	Comment
Camera	Working (No Pixel Binning)
Speaker / Mic	Working
Bluetooth	Working
WiFi	Working, 5 & 2.4 GHz
SIM / Mobile Data / Voice	Working
VoLTE	Not Working (a common issue among Samsung devices)
Fingerprint	Working
NFC	Working
USB headset	Not Working (from my experience)

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Bluetooth issues

If your headset isn't recognized or not working, change these settings from PHH settings:

• Misc features > Force-disable A2DP hardware offload: On
• Misc features > Use alternate way to detect headsets: On If your system crashes when using Bluetooth, please turn off media recommendations.

Note: The camera quality and access to sensors depend on what camera app you're using and whether you enabled Camera2 HAL3 API.

Tested By: vitalitk - SM-M315F(SEK) - M315FXXU2BUH8 - 5/5/2022