My iPhone 4 with iOS 6.0 does not show up in devices when I connect it to my computer with a USB cable. I haven't had issues like this until recently. Shows up in iTunes, but is not recognized by spotify so I can't sync local files.
I have tried restarting my phone and computer, deleting and redownloading the application, and have made sure to sign in using the same log in details. My phone and computer are also connected through the same WIFI network.
I have a premium account. How can I fix this problem?