- Tap the Home button twice. This will display your most recently used apps.
- To switch between app previews, swipe right or left.
- Then, on an app's preview, swipe up to close it.
- Repeat the process until all apps have been closed.
After closing all background apps, restart your iPhone 8 Plus or do a soft reset by pushing and holding the Side/Power button until the Slide to Power off prompt displays. To turn off the iPhone fully, drag the slider to the right. After 30 seconds, hit the Side/Power button once more until the gadget powers off.