Do I have to plug the phone in?
Not necessarily. The connection is wireless; USB is there as an alternative.
Does it work with a reversing camera?
Yes. There are two AHD video inputs, so you can add a rear camera and, if you want, a front one too.
Does it fit the Opel Mokka X 2016-2019?
Yes. The module is made for the Opel Mokka X 2016-2019, with the IntelliLink 8" factory system. It plugs into the LVDS cable behind the original screen.
Do I lose the factory system?
No. The original system stays fully working, and you switch between it and CarPlay whenever you want.