How to Force Reboot an iPhone & iPad (with Home Buttons)
Rarely, an iPhone, iPad, or iPod touch will become completely unresponsive and errant, leading to what amounts to a frozen device that just won’t do anything. The most obvious indicator of this is when something on screen just cease up completely and the touch screen becomes unresponsive to all input, and clicking on any of the hardware buttons also does nothing. Fortunately you can almost always remedy these unusual situations by forcibly rebooting the iOS device, a low tech solution that works to remedy most of these issues, it only takes a few seconds, and which is really pretty easy.
The tutorial here will show you how to force restart any iPhone, iPad, or iPod touch with a clickable Home button.