Sorry if this is a massively repeated thread but as I'm on my phone sat in the car I can't find anything... when I try to change source to radio it beeps as normal but says off in the bar at the top.... how do I turn this back on? Thanks

wow, which appradio?  Do you have the latest up date to your Pioneer radio?  Which phone are you using?  What is the operating system of the phone?

App radio 2.... not even connected the phone yet, can't get the radio function on the stereo to work... but for the record it's a galaxy s4

Also not sure which update is on the radio... how do I check/upgrade? Thanks

What bar at the top?

So you are on the main home screen of the HU with no phone connected. This has the Radio icon below the time on the left hand side. Are you saying if you press this, nothing happens?

I have the same issue with my radio I innstalll it and when i click radio nothing happen it just shows a OFF on the top of the screen. what to do. have no radio in the car and need it to work. also the audio section in the setting menue is also greyed out and i cant access it.

Sounds like it's wired wrong, possibly the 12v switched and 12v constant are the wrong way around.