Restarting or resetting iPhone
If something isn’t working right, try restarting iPhone, forcing an app to close, or resetting iPhone.
Restart iPhone: Hold down the On/Off button until the red slider appears. Slide your finger across
the slider to turn off iPhone. To turn iPhone back on, hold down the On/Off button until the Apple
logo appears.
Force an app to close: Hold down the On/Off button for a few seconds until a red slider appears,
then hold down the Home button until the app closes.
You can also remove an app from the recents list to force it to close. See “Opening and switching
apps” on page 19.
If you can’t turn off iPhone or if the problem continues, you may need to reset iPhone. A reset
should be done only if turning iPhone off and on doesn’t resolve the problem.
Reset iPhone: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.