Unlock Bootloader Sharp Aquos Zero 2 Upd

fastboot reboot

Your phone will perform a factory reset. Upon reboot, you will see a warning about the bootloader being unlocked.

A: No. The hardware refresh rate is independent of the bootloader. However, some custom ROMs may default to 60Hz. You can manually set it back via build.prop.

In the context of the Sharp Aquos Zero 2, UPD is simply shorthand for "Update" – often seen in firmware file names (e.g., SH-01M_UPD_20231101.zip).

A: Yes, but do not do this unless you are flashing back to full stock Sharp firmware. Use fastboot oem lock – but this wipes data again and may brick if the firmware isn’t 100% stock. unlock bootloader sharp aquos zero 2 upd

Users have reported that devices running firmware versions containing the UPD designation (typically seen in Japanese carrier models like Docomo or SoftBank, or updated regional binaries) have a locked bootloader that cannot be unlocked via standard fastboot methods.

Assuming you have your unlock.bin token or generated token:

During reboot, do not disconnect the USB cable.

After the reset, the phone will reboot to the setup wizard. It is now unlocked.

To confirm:

You should see:

(bootloader) Device unlocked: true
(bootloader) Device critical unlocked: true

Firmware packages labeled “UPD” usually come from Japanese carriers (e.g., au/KDDI, SoftBank). These builds lock the bootloader tighter than global versions. Attempting standard fastboot oem unlock will likely fail with a remote: Command not allowed error.