If you have an unlock token (usually a .bin or .sig file), use the following command: fastboot flash cust-unlock your_token_name.bin Followed by the standard unlock command: fastboot flashing unlock
This 2,500+ word guide will walk you through every single step—from understanding the risks to executing the final fastboot oem unlock (or the specific UPD command). unlock bootloader sharp aquos zero 2 upd