This technique applies to most iPhone models, from the original to the latest version.
Press and hold theSleep/Wakebutton for a few seconds.
Release the button when you see a message appear on the screen.
Apple
A power button appears on the screen that readsslide to power off.
Move the slider all the way to the right to shut off the phone.
A progress wheel appears in the center of the screen.
The iPhone turns off a few seconds later.
If you wait too long to slide the button, the phone cancels the shutdown automatically.
If you want to cancel it yourself, tapCancel.
How to Turn Off iPhone X and Later
Turning off the iPhone X is a little trickier.
Here are the steps to turn off an iPhone X.
Press and hold theSideandVolume Downbuttons at the same time.
Wait for the power-off slider to appear.
Move the slider from left-to-right to shut down the phone.
In that case, try a technique called a hard reset.
This should only be used when other attempts have failed, but sometimes it’s just what you need.
Press and hold both theSleep/Wakebutton and theHomebutton for 10 seconds or more.
The screen goes black, and the Apple logo appears.
On the iPhone 7 series and 8 series, use theVolume Downbutton instead of Home.
When you see the logo, release both buttons and let the phone start normally.
The hard reset feature is not the same thing asrestoring a phone to its factory default options.
The wordrestoreis sometimes calledresetbut has nothing to do with restarting a phone.
Hold theSidebutton until the screen goes dark, and then let go of the button to reboot the phone.
What about an iPhone that won’t turn off at all?
Find out what causes that andhow to fix an iPhone that won’t turn off.
