Unlocking the bootloader allows you to root your device, flash custom ROMs (like LineageOS), install custom kernels, and deeply customize your
The Zenfone 9 is closer to Samsung’s Knox model than Pixel’s. Once unlocked, the device can never return to a "pristine" secure state.
| Device | Unlock Method | Warranty Impact | Hardware Fuse | Alternative OS Support | | :--- | :--- | :--- | :--- | :--- | | | Official token | Void (de facto) | Yes (permanent) | LineageOS, crDroid (maintained) | | Google Pixel 7 | Official fastboot | Not void in US/EU | No (reversible) | GrapheneOS, CalyxOS | | Samsung S22 (Exynos) | Official (region-dep) | Knox eFuse (0x1) | Yes (permanent) | Limited (Trip knox = no secure folder) | | OnePlus 10 Pro | Official via MSM | Void (but often ignored) | No (but relock fails) | Strong community | | Xiaomi 12 | Official (Xiaomi account, 7-day wait) | Void | No (but relock requires server) | Heavy (bootloader unlock hard to get) |
Custom recoveries like TWRP (Team Win Recovery Project) allow you to flash custom ROMs, create full system backups, and install Magisk. TWRP is available for the Zenfone 9 from the XDA forums. zenfone 9 unlock bootloader
You will need the dedicated "Unlock Tool" app provided by ASUS specifically for the
If ASUS restores the server, the process is straightforward:
: The move has led to a significant "right to repair" and "right to own" debate, with many enthusiasts now warning against the brand for those who value software freedom. Summary of the Conflict Before May 2023 Current Status (2026) Method Official App (Free) Potential Paid Service/Shipping Availability Instant & Home-based Restricted & Service Center required Support Officially Encouraged Officially Discouraged Unlocking the bootloader allows you to root your
ASUS does not provide an official tool to relock the bootloader. Attempting to lock it manually via fastboot oem lock will likely corrupt your device signature, resulting in a . If you need to return to factory state, you must flash the full stock raw firmware using ASUS’s Flash Tool, but the bootloader status may remain "unlocked."
Upon rebooting, you will see a new splash screen warning: "The bootloader is unlocked, so this device is not trustworthy." This is normal.
There have been community-driven attempts to find workarounds, but they are increasingly difficult: Firmware Patching TWRP is available for the Zenfone 9 from the XDA forums
Unlocking the Asus Zenfone 9 Bootloader: A Complete Guide to Freedom Asus Zenfone 9 Go to product viewer dialog for this item.
Install the app. (You may need to allow installation from unknown sources). Open the .