Do I need to have a SIM card installed to have accurate GPS location information? I would think not, but I have not had accurate location information displayed, except when I enable Android Auto. I have the antennae installed toward the front of my vehicle's dash near the windshield, and it is under a plastic panel to hide it. Could I be getting interference?
I did read another post to try using GPSTest, which I will do later.
Other than this the system is working beyond my hopes, and I have dialed in the sound system and it is very nice.
