I have HTC M9 plus Pioneer 4100nex. Assuming it's a straight phone micro USB to Pioneer USB2 wired connection. No other wires, adapters, etc. For the life of me I can't get this to work. It will occasionally connect, but it doesn't more often than not. Is there a certain sequence to turn things on? Main thing I want is live weather radar on Pioneer screen. Not sure if the included Google apps will do that (yet)?
Also looking at ARUnchained Reloaded which is an expensive app ($30), but it is a full mirror of the phone with complete push button functionality active on the head unit's screen. With that, one could do every single app on the radio display. Pretty sweet there.