I've got an iPhone 4S iOS 6.1.3. I have a Ford Focus with no Bluetooth (unfortunately) :(, but it has a USB port. I can connect my iPhone to this and it will play music from my phone. However, if I open Spotify and try to play music it will play for a couple of seconds and revert back to the music app.
I've looked online and tried all the different techniques like; quitting the music app and hitting the sleep button as soon as I press play on Spotify but it doesn't work.
Does any one have any suggestions...?