Apple has changed the method to force restart or hard reset an iPhone 8 or iPhone 8 Plus, as outlined in a recent support document
While rebooting an iPhone 7 or iPhone 7 Plus requires pressing and holding both the Sleep/Wake and Volume Down buttons for at least 10 seconds, until the Apple logo appears, restarting an iPhone 8 or iPhone 8 Plus takes three steps.
The change appears to have been made because, on iPhone 8 and iPhone 8 Plus, pressing and holding the Side aka Sleep/Wake button and one of the Volume buttons now activates the Emergency SOS feature
Keep in mind that Apple now refers to the Sleep/Wake button as the Side button as of the iPhone 8, iPhone 8 Plus, and iPhone X.
How to Force Restart or Hard Reset the iPhone 8 and iPhone 8 Plus
- Press and quickly release the Volume Up button.
- Press and quickly release the Volume Down button.
- Press and hold the Side button (aka power) until you see the Apple logo.
Powering off regularly still requires holding down the Side button for a few seconds until the "slide to power off" prompt appears. In iOS 11, there's also a "Shut Down" option in the Settings app at the bottom of the General menu.
Force restarting an iPhone is different than recovery using DFU mode
, for which the steps remain the same as the iPhone 7 and iPhone 7 Plus.