Install firmware — Light Guide

What this can do:

Install LightOS with ReSukiSU + SUSFS
Install LineageOS 23.2 (Android 16) with ReSukiSU + SUSFS

Requirements:

Light Phone III (TLP301, firmware 00WW_1_440000).
Root and shell access granted from the previous stage.
Desktop Chrome or Edge.

1. Activate Fastboot

This requires root and shell access granted in the previous step. It will download a partition backup, prepare the unlock and restart the phone into fastboot.

2. Unlock the bootloader

Select your phone again in fastboot. Press Volume Down once, then press the lock button on your phone. Your phone will reboot into LightOS. Unlocking erases your data.

3. Set up LightOS again

Connect the phone to Wi-Fi and update LightOS to v582 or later.
In the Phone tool, dial *7412369#.
Open Settings → Debug and enable Android Dev Mode, then enable USB debugging in Android’s Developer options.
Activate Prism root again and grant Shell access in ReSukiSU.

4. Download the release

Stock (with LightOS) with ReSukiSU and SUSFS LineageOS with ReSukiSU and SUSFS (experimental)

5. Enter fastboot

Connect the phone with USB debugging and Prism root active. The tool checks the installed firmware and restarts into fastboot.

6. Flash the release

Select your phone again in fastboot. Keep the phone connected while installing.

7. Set up ReSukiSU

Verifies the installation, installs microG and its required modules, and removes Prism and Shizuku.