My experiences I'm getting this to work via Wi-Fi. On head-unit reloaded app I said GPS to work from phone not tablet. I also set sounds to be from phone not tablet. I have not installed Wi-Fi launcher or anything that I've heard other people mentioning. My steps for connection are as follows number one start mobile hotspot while tablet is booting up number two open Android auto on phone go straight to developer settings and start server number three pull down notification bar from tablet and ensure that I am connected to my mobile hotspot. That is a visual check. At that point all I do is touch the Wi-Fi icon and it automatically kicks in and just works. I have never gotten any other method to work aside from USB and I paid for the application twice cuz the first time I paid for it I realized that the original developer have passed away. I can guarantee if you follow the simple steps I just wrote out. Hopefully they are as simple as I think they are. You will get this to work via Wi-Fi with no issues. Thanks. FYI I did contact the current developer I mentioned to him that I paid for the application numerous times no answers. But application is incredible thank you again.