How to force restart iPhone 6, 4s,5/ iPad
How to Restart iPhone 6:1. Press and hold the Sleep/Wake button on the top of your iPhone/iPad until a red slider appears
2. Drag the slider to turn off your device.
3. Now Press and hold the Sleep/Wake button until the Apple logo appears to start your Phone.
Forced restart iPhone 6:If your phone is very slow and not responding properly, you can forced restart your iPhone/iPad.
1) Press and hold both the Sleep/Wake and Home button for at least 10 seconds, until you see the Apple logo