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 on the Zenfone 9 allows for deep system modifications that are otherwise blocked: zenfone 9 unlock bootloader
ASUS previously provided an (an APK file) that communicated with their servers to authorize unlocking. requires communication with an ASUS verification server to
In simple terms, the bootloader is the low-level software that tells your phone which operating system to load. By default, ASUS locks it to ensure only the official, signed Zenfui/Android OS runs. signed Zenfui/Android OS runs.