2015 Dodge Charger SXT usb audio problem?

I've had a 2015 Dodge Charger for about a month now, and when I first had it, I had an iPhone 5s. With that 5s, I would connect a usb cord to the port in the car and my phone would play music just fine. However, I recently got an iPhone 6, and now when I connect it to the USB port, the screen will read "Device Unplayable." This has never happened before. I can use Bluetooth on my iPhone 6 to play music with no problem, but I can't with the usb. I'm not sure as to what is causing the problem let alone how to fix it.

Ask your Dodge dealer, maybe they have a firmware update.

Go back to the dealer and see if the phone works in another ride the same as yours.