If the token is missing, the BootROM or secondary bootloader (e.g., Little Kernel, U-Boot) blocks all write/erase commands on certain flash partitions (e.g., aboot , xbl , trusted_app ).
Unlike older Android phones where you simply toggled "OEM Unlocking" and ran a fastboot command, modern devices use a token system to track warranty status and prevent unauthorized unlocking. please flash unlock token first
Once you apply, the server checks your device status. If the token is missing, the BootROM or