Unlocking the bootloader (if successful) still results in a permanent loss of warranty and may cause the device to fail Play Integrity or SafetyNet checks, affecting banking apps. Attempting the Unlock (Legacy Method)
In late 2025, ASUS confirmed that for models released in 2023 or earlier, the tool is permanently discontinued due to "stability considerations". zenfone 9 unlock bootloader
requires communication with an ASUS verification server to complete the unlock process via its APK, "offline" or standard fastboot flashing unlock commands typically do not work. Unlocking the bootloader (if successful) still results in
Starting in May 2023, ASUS claimed the unlock servers were down for "maintenance" and would return in Q3 2023. zenfone 9 unlock bootloader