(Replace the filename with the exact name of the LineageOS ZIP archive you downloaded).
In recovery, perform a factory reset/format data to prepare for the new OS. Sideload LineageOS: adb sideload [filename].zip to install the ROM. (Optional) Flash GApps:
You must be honest with yourself:
Press and hold the buttons simultaneously until the Fastboot screen appears. Connect your phone to your PC via USB. Step 4: Flash LineageOS Recovery
# Flash vendor_boot (mandatory for this build) fastboot flash vendor_boot vendor_boot.img asus zenfone 9 lineage os
became the center of a major controversy when Asus disabled its unlock tool in 2023. Recent discussions on community hubs like
The lightweight nature of LineageOS often results in improved battery life and smoother operation compared to manufacturer skins.
Move all downloaded files into your extracted platform-tools folder to simplify terminal commands. Step 4: Boot Into Fastboot Mode Turn off your Zenfone 9 completely.
Open a terminal or command prompt window on your computer, navigate to your platform-tools folder, and type: fastboot devices Use code with caution. (Replace the filename with the exact name of
This is the first and most critical step. Note that unlocking the bootloader usually wipes your data and may void your warranty. Custom Recovery: You’ll need a recovery like or the official Lineage Recovery to flash the ROM. ADB & Fastboot:
LineageOS includes native privacy tools like Trust. This interface gives you deep control over app permissions, data sharing, and device security status. Prerequisites and Requirements
Running LineageOS on the ASUS ZenFone 9 offers several benefits, including:
For those who have successfully navigated the unlock process, LineageOS transforms the Longevity: (Optional) Flash GApps: You must be honest with
The Asus ZenFone 9 running Lineage OS is a poster child for the custom ROM community’s mission. Asus built a masterpiece of hardware, but abandoned its software obligations far too early. Lineage OS picks up the torch.
Open the Unlock App on your device and follow the on-screen prompts.
A computer (Windows, macOS, or Linux) with working adb and fastboot binaries installed.