My iPhone 5 froze after the YouTube app failed to open.
I've tried holding the sleep/wake button + home button down with no luck. Nothing happens. I'm able to slide down the Notification Center and type and search in the box but then I try to open an app and nothing happens.
If I press and hold to activate Siri, she appears for a second then turns off as if I pressed the home button again.
I've tried connecting the iPhone to a Mac but as it's passcode enabled it tells me to unlock it and then replug it which I'm not able to do.