Navigate to System > Developer options and check for OEM unlocking .
for specific models that provides official unlock instructions and software updates. Check their official support portal to see if the is currently supported. unlock bootloader sharp aquos zero 2 upd
UPD stands for Update Protocol. It is Sharp’s proprietary low-level communication protocol. Most unlock tutorials fail because they ignore UPD. You must either send UPD-wrapped commands or use the official Sharp tool. Navigate to System > Developer options and check