For some reason suddenly today I turned on my iPhone from sleep and then did the "slide to unlock" this brings me to the "favorites" screen in the Phone app. When I try to touch buttons on the screen or hit the home button, nothing responds. I tried holding the power button for 30 seconds, holding the home button for 30 seconds, and holding both of them for 30 seconds, it will not power down. At the slide to unlock screen I double tapped the home button and hit play to start playing some music, when I slide to unlock it brings me again to the "favorites" screen in the Phone app, if I double click the home button it brings up the music controls on screen, but they don't respond to my touching/tapping?! Any ideas on what to do? I tried syncing/charging and that didn't help.