Like the subject says - any way to force the iphone to turn off, even when it doesn't want to? I had an odd situation the other day, when the phone got stuck in "phone" mode - everything within phone mode seemed to work fine, but the home button would not take me back to the home screen, and holding down the power button for any length of time would not bring up the "slide to power off" screen. I eventually put it away and checked it an hour or so later and it was fine, but if I had to go on a plane, that would not be an option. On any other phone, I would just take out the battery. How do you force a power-off on the iPhone?