phone

Hi, I bought a cell phone holder for my car that works great and offers wireless quick charging. I have the USB cable plugged into a hot rod USB to 12v plug. However my phone stops and starts charging constantly, leading me to wonder if the voltage being put out by this socket is actually 12v...

I've never paired up my phone (currently Samsung S9) with my car in the 12 years I've owned it. I know I can make and receive phone calls with this, can I also play podcasts/music through this connection? Accessing music/podcasts actually would be my main use for the BT connection if that was...