I use my USB port to charge my cell. Not always but often the Soul sound system thinks the presence of a device means I want to play MP3 files and so I get a message: "Searching for media" and the system continues to interrupt the radio with this constant searching. At other times, I have no problem at all - radio plays uninterrupted and my phone charges. Can someone explain how I can avoid this annoying process or otherwise I have no way to charge my phone in the car. Thank you.