How to reset your iPhone or iPad
You should force restart your iPhone, iPad, or iPod touch as a last resort, and only if it's not responding.
- Press and hold down the sleep/wake button at the top of you iPhone or iPad.
- At the same time, press and hold down the Home button on the front of your iPhone or iPad.
- Keep holding both buttons until the screen turns off (roughly around 7-10 seconds) and then turns back on again and displays the Apple logo.