The ASUS Zenfone 9 is a rare gem in the modern smartphone world—a high-performance, truly compact flagship. However, as it reaches the end of its official two-year software update cycle, many power users are looking toward LineageOS to extend its life and unlock new features. Here is a comprehensive look at the current state of LineageOS on the ASUS Zenfone 9, including availability, the bootloader controversy, and what to expect from the custom ROM experience. The Current State of LineageOS Support As of 2024–2025, there is a critical distinction between official and unofficial support for this device. Official LineageOS: The ASUS Zenfone 9 (codenamed "sake") does not currently have an official build maintained on the official LineageOS download page. Unofficial Builds: You can find community-driven builds, often hosted on the XDA Forums. These versions frequently offer the latest Android features (like Android 13 or 14) but may lack the rigorous stability testing of official releases. The "Bootloader" Problem The biggest hurdle for anyone wanting to install LineageOS on a Zenfone 9 today is bootloader unlocking . Official Tool Removal: ASUS previously provided an official APK to unlock the bootloader, but they took the tool offline in late 2023. Current Status: Without the official tool, most Zenfone 9 units cannot be unlocked, which is a prerequisite for flashing custom ROMs like LineageOS. Alternative Methods: Some users have reported success using older firmware versions or unofficial workarounds found on community forums like XDA, but these are risky and not guaranteed to work for all serial numbers. Why Install LineageOS on the Zenfone 9? If you managed to unlock your device before the tool was removed, LineageOS offers several key benefits over the stock ASUS ZenUI:
Breathing New Life into a Compact Powerhouse: The Complete Guide to ASUS Zenfone 9 and LineageOS In a smartphone market dominated by massive 6.7-inch slabs and gimmicky foldables, the ASUS Zenfone 9 emerged as a cult hero. Launched in July 2022, it championed the dying breed of compact flagships. With its Snapdragon 8+ Gen 1 chipset, a gimbal-stabilized camera, a headphone jack, and a 5.9-inch screen, it was perfect for users demanding one-handed usability without performance compromise. However, even the best hardware eventually faces software obsolescence. ASUS promised two major Android updates and security patches for roughly two years. For a device as beloved as the Zenfone 9, that is simply not enough. Enter LineageOS —the legendary open-source operating system that promises to extend the life, privacy, and performance of your Zenfone 9 long after ASUS stops caring. This article is a deep dive into everything you need to know about running LineageOS on the Zenfone 9: the benefits, the risks, the installation process, and the current state of official support.
Part 1: Why Would You Put LineageOS on a Zenfone 9? The Zenfone 9 is already running Android 14 (as of its final ASUS update). It has a clean "ZenUI" skin that is close to stock Android. So why change it? 1. Extended Longevity ASUS has officially ended major OS updates for the Zenfone 9. It will not receive Android 15. LineageOS, however, is community-driven. As long as maintainers keep working, your Zenfone 9 could see Android 15, 16, and beyond. You are decoupling the hardware’s life from the manufacturer’s update cycle. 2. Debloating and Performance While ZenUI is lightweight, it still includes ASUS apps, custom launchers, and telemetry. LineageOS offers a truly minimal AOSP (Android Open Source Project) experience. Without background services like "ASUS Account" or "Local Hotspot," the Snapdragon 8+ Gen 1 feels snappier, and RAM management improves noticeably. 3. Privacy and Security LineageOS comes with advanced privacy features that stock Android lacks:
Privacy Guard: Granular control over app permissions (e.g., grant an app location access, but send it fake/empty data). Trust Interface: A security dashboard that warns you about SELinux status, root access, and encryption. No Google by default: You can flash LineageOS without Google Play Services (microG support is available), drastically reducing tracking. asus zenfone 9 lineage os
4. Customization Despite ASUS being "near-stock," LineageOS offers deeper tweaks: system-wide accent colors, custom status bar icons, advanced gesture controls, and built-in root management via add-ons.
Part 2: Is There Official LineageOS for the Zenfone 9? Short answer: Yes, but check the official wiki first. As of late 2024 and into 2025, the ASUS Zenfone 9 (codenamed zenfone9 or sometimes AI2202 ) has official LineageOS 21 (based on Android 14) available. This is a significant milestone because official status means:
Weekly or bi-weekly builds are automatically compiled. The device passes the LineageOS compatibility requirements (SELinux enforcing, no critical hardware bugs). You get OTA (over-the-air) updates via the system updater. The ASUS Zenfone 9 is a rare gem
Note: Always verify on the official LineageOS wiki (wiki.lineageos.org/devices/zenfone9) before proceeding, as maintainers may change over time. If official support is not ready or has been suspended, there are unofficial builds on XDA Forums. However, for a daily driver, always prioritize official builds. What works? (Stability report)
Almost everything. The Zenfone 9 uses a relatively standard Qualcomm SM8475 platform. Wi-Fi, Bluetooth, 5G/4G: Fully functional. Audio: 3.5mm jack works. Dirac audio enhancements are usually replaced with AOSP equalizer. Cameras: The main 50MP Sony IMX766 works, including the gimbal OIS. However, you lose ASUS’s proprietary camera algorithms. You will need to use GCam (Google Camera) ports to regain computational photography. Fingerprint sensor: The side-mounted capacitive sensor works flawlessly. Not working: Some builds might have issues with VoLTE on certain carriers, or the secondary ultrawide camera might have color calibration differences. Always read the known issues thread.
Part 3: Prerequisites – Before You Flash Flashing LineageOS is not for the absolute beginner, but the Zenfone 9 is forgiving. You will need: The Current State of LineageOS Support As of
A Windows, Linux, or macOS PC. An unlocked bootloader. ASUS allows bootloader unlocking via their official "Unlock Device App." Warning: This wipes your data and voids your warranty. USB Debugging enabled (in Developer Options). Fastboot & ADB tools installed on your PC. The LineageOS build file ( .zip ) and the recovery image ( .img ) from the official site. Optional: Google Apps (GApps) like NikGApps or MindTheGApps (since LineageOS does not include Google services by default). Backup! Use Google Backup, SwiftBackup, or manually copy your photos and documents.
The Bootloader Unlock Warning ASUS’s unlock tool permanently changes your device. Once unlocked, you cannot relock the bootloader without risk of bricking. Apps like Netflix may lose Widevine L1 (HD streaming) if you do not properly hide the bootloader status. Proceed with caution.