Carlinkit says to not connect your phone's wifi to the device otherwise they say that the phone tries to use the device's WiFi and results in performance/connectivity issues. If you did, just forget/ignore the netowrk on your phone.Can you elaborate? If my phone isn’t connected to the autokit then CarPlay doesn’t work. But I have noticed that when there’s an issue, my phone displays the wifi signal in the upper right corner. When it’s smooth, it still shows as connected to the autokit wifi in my settings but the icon in at the top of my screen only displays 5G.
I’ve forgotten the wifi 200 times and this behavior comes back. If I toggle my wifi off and on it will sometimes work as expected.
Also, don't know if you upgraded recently but there's also a new firmware update to 4.0. I never tried it, but it looks like it only requires Bluetooth and Wifi connections now and not the personal hotspot.