Zenfone 9 Unlock Bootloader _top_ May 2026

Complete Guide: How to Unlock the Bootloader on the Asus Zenfone 9

Unlocking the bootloader on the Asus Zenfone 9 is the first step toward rooting your device, installing custom ROMs, or flashing custom kernels. While Asus is relatively developer-friendly compared to other manufacturers, the process involves using Asus’s official Unlock Device App.

⚠️ IMPORTANT WARNINGS BEFORE YOU START zenfone 9 unlock bootloader

6. Fix banking apps (SafetyNet).

Install Magisk, enable Zygisk, install the “Play Integrity Fix” module, and use “Shamiko” to hide root from Google Play Services. Add your banking apps to the DenyList. Complete Guide: How to Unlock the Bootloader on

Phase A: Setting Up ADB and Fastboot

  1. Extract the Platform Tools ZIP to a folder on your PC, e.g., C:\platform-tools.
  2. On your Zenfone 9, plug it into the PC. A popup will ask “Allow USB debugging?” – check “Always allow from this computer” and tap OK.
  3. On your PC, open a command prompt or terminal in the platform-tools folder:
    • Windows: Shift + Right-click inside the folder → “Open in Terminal” or “Open PowerShell window here.”
  4. Type the following and press Enter: 
    adb devices
    You should see your device listed with “device” next to it. If it says “unauthorized,” check your phone again.
  5. Reboot your Zenfone 9 into fastboot mode by typing: 
    adb reboot bootloader
    Your phone will restart to a black screen with small text. This is the fastboot mode.
  6. Verify fastboot connection: 
    fastboot devices
    If you see a serial number followed by “fastboot,” you’re ready. If not, reinstall ASUS USB drivers.

Software Setup:

  1. Enable Developer Options: Go to Settings > About Phone > Software Information and tap Build Number seven times.
  2. Enable OEM Unlocking: In Developer Options, toggle on OEM Unlocking. If this is grayed out, your phone is either carrier-locked or you need an internet connection to allow ASUS servers to check unlock eligibility.
  3. Enable USB Debugging: In Developer Options, toggle on USB Debugging.

1. Introduction: The Bootloader as a Digital Border

The bootloader is the first piece of code executed on an application processor. In modern Android devices, its primary role has shifted from mere hardware initialization to chain of trust enforcement. A locked bootloader cryptographically verifies every subsequent partition (boot, system, vendor) against a fused hardware key (e.g., RPMB or TrustZone-stored hash). Unlocking this border is a prerequisite for installing custom kernels (LineageOS, GrapheneOS), gaining root access (Magisk), or low-level forensic analysis. Warranty Void: Unlocking the bootloader may void your

The Asus Zenfone 9 (codename: odin) presents a compelling case study: it is a compact, Snapdragon 8+ Gen 1 device that officially permits bootloader unlocking, a practice abandoned by Samsung (for Snapdragon US models), Huawei, and Google (with increasing friction on Pixels via hardening).

3. Flash a custom recovery (optional but recommended).

The Zenfone 9 community uses TWRP (Team Win Recovery Project) . Check the XDA Developers forum for the latest TWRP image for the Zenfone 9.

fastboot flash recovery twrp_filename.img

After Unlocking

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