How do I unlock bootloader when OEM unlock setting is missing in Developer options? I have a HTC 816G Dual SIM. As you can see in the image below of Developer options there is no &quot;OEM unlock&quot; option. What can I do to unlock bootloader?
Android 4.x don't have this option, this option was first seen in lollipop (5.0).

This I've found on XDA if you don't find a guide to unlock your bootloader ask in the help thread.