It's an Iphone 3 and the screen has frozen on the passcode entry screen. I put the wrong pin in and then the right one and it's just frozen. None of the buttons work. Even the button on the side to turn the sound on and off does nothing.
I've tried turning it off but that won't work either. I've also taken the SIM out and still nothing.
The screen has now gone a bit darker but is still showing the passcode screen.
Bloody thing is fully charged so will take a while to power down... tell me it will be ok when that happens. Or what else to try.