1. On the headset go into Settings and click About Device.
2. The top item, PUI Version, click this 8 times. The Development menu option will now appear on the right.
3. In this 2D menu, Developer Options should appear at the bottom under System. If it does not then please do the following: select About Device, and click PUI Version here 8 times.
4. Go back to the main 2D menu and you should now see Developer Options appear at the bottom under System. You are now in Developer Mode.