Unlike Pixel or OnePlus devices, Sharp does not officially support bootloader unlocking for the general public. For the Aquos Zero 2, you generally cannot use the standard fastboot oem unlock command immediately.
This guide assumes a basic understanding of ADB (Android Debug Bridge) and Fastboot commands. The "UPD" in your request likely refers to updating the firmware or the unlock process for the latest software versions. unlock bootloader sharp aquos zero 2 upd
fastboot oem unlock
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