If "OEM Unlocking" is grayed out in Developer Options:
This is the most common Asus error. It means the Asus unlock verification server is down.
Unlocking triggers a factory reset. Back up everything. zenfone 9 unlock bootloader
adb reboot bootloader fastboot flash unlocktoken /path/to/unlock_token.bin fastboot oem asus-unlock # or similar legacy command fastboot reboot
Yes, but it’s dangerous and unnecessary. To relock: If "OEM Unlocking" is grayed out in Developer
The Zenfone 9 is one of the last unlockable compact flagships, but ASUS has made the process deliberately painful with permanent DRM degradation.
Asus has periodically disabled and updated its unlock servers. If the official APK tool is currently active, it is the safest method. The Unofficial / Community Status Back up everything
One of the first things Jack did when he received his Zenfone 9 was to research how to unlock its bootloader. For those who don't know, unlocking a device's bootloader allows users to modify the operating system, install custom ROMs, and gain superuser access. Jack had done it on his previous Zenfone devices, but he knew that each new model brought new challenges.
Once in Fastboot mode, check the connection with fastboot devices .
The Android Verified Boot (AVB) process ensures that all executed code comes from a trusted source. An unlocked bootloader allows the execution of unsigned code, which increases the risk of persistent rootkits or malware being installed deep within the system.