Before, I used to be able to plug my Iphone 4 into the USB slot in my car radio and it would play my music through the car speakers. I recently updated my phone to iOS 7 beta. Now, whenever I plug it in I get a buzzing noise, or nothing at all and the radio sometimes says "no file" instead of giving a song name or saing "iphone- read." (even when it says Iphone-read it sometimes just buzzes."
Before this update, I had absolutely NO problems with this, so i'm convinced that they're related.
Thank you!
См. статью: Downloaded iOS beta, and iphone won't plug into radio USB?