Installing AOSP-Based Custom ROM on Flame (6.6 Kernel)

⚠️ WARNING: Do not flash any third-party custom recovery (OrangeFox / TWRP). They are not supported on the latest platform and can cause a hard brick. Use only the recovery image provided with this ROM.

# Prerequisites

- Unlocked bootloader

- Latest HyperOS 3 stock ROM for your region installed

- PC with adb and fastboot (Android platform-tools)

- Reliable USB cable

- Battery charged to at least 50%

# First-Time Installation

Use this if you are coming from stock firmware or any other custom ROM (including ones not based on the 6.6 kernel).

# 1. Flash the latest HyperOS 3 stock ROM

Install the latest HyperOS 3 stock ROM for your region before proceeding.

# 2. Boot into bootloader mode

Power off the device, Hold Volume Down + Power, Keep holding until FASTBOOT appears, then release.

# 3. Flash the image files

Connect the device to your PC and run:

fastboot flash boot boot.img
fastboot flash dtbo dtbo.img
fastboot flash vendor_boot vendor_boot.img
fastboot flash recovery recovery.img

# 4. Reboot into recovery

fastboot reboot recovery

# 5. Sideload the ROM

In recovery, choose Apply update → Apply from ADB, then run:

adb sideload <rom>.zip

# 6. Sideload GApps (optional)

After the ROM finishes, recovery may prompt you to reboot to recovery to flash an additional zip. Select Yes if you want GApps, then run:

adb sideload <gapps>.zip

# 7. Factory reset

Select Factory Reset → Format data / factory reset and continue with formatting.

# 8. Reboot to system

Select Reboot system now. The first boot may take several minutes.

# Updating from an Existing 6.6-Based Custom ROM

1. Flash the recovery image:

fastboot flash recovery recovery.img

2. Reboot to recovery and sideload the ROM zip:

adb sideload <rom>.zip

# Clean flash vs. dirty flash

- Coming from any other custom ROM: clean flash (factory reset required)

- Updating within the same ROM: dirty flash is fine, unless the release notes say otherwise