Rebooting the device on iOS

To reboot an iOS device, press and hold both the power button (on the top of the device) and the home button (on the front of the device). Continue holding both buttons whilst the display shows the shut down instructions, and keep holding until the screen goes completely black but with the Apple logo displayed in white in the centre of the screen.

Please note that on iOS 7 and later the reboot screen is inverted, with a white background and a black Apple logo.