I have a used Galaxy S III off eBay, a brand new Samsung multi-media dock (audio, HDMI, USB ports), and of course Ting service. When I put the phone in the dock, it charges fine, but no dock mode thus no audio, HDMI, or USB ports work. Searched around and found nothing. Is there some way to tell if the phone is bad, the dock is bad, or is it a software thing? I don't have any other Samsung phone or Samsung dock. I found no way to initiate multi-media dock mode via settings or software (I know you can set clock dock mode, but that not do the audio, hdmi, or usb ports).
Galaxy S III and multi media dock - No dock mode.