has a developer community on platforms like XDA Developers , the lack of an unlock tool has severely hampered the development and installation of custom firmware like LineageOS.
: ASUS disabled the official bootloader unlock tool for the zenfone 9 unlock bootloader
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. has a developer community on platforms like XDA
: At launch in August 2022, ASUS released both the bootloader unlock tool and kernel source code, marketing the as a developer-friendly device Community Fallout : At launch in August 2022, ASUS released
: In late 2025, ASUS officially confirmed that the Bootloader Unlock Tool for older models, including the , has been discontinued due to "stability considerations".
: In late 2025, Asus officially confirmed that the Bootloader Unlock Tool for older models, such as the Zenfone 9, has been removed from their website due to "stability considerations". Unmaintained Servers