Your lock screen wallpaper keeps changing because the Background setting is configured to Windows Spotlight or Slideshow. These settings automatically rotate images on your lock screen.

Now, thanks to iOS 16, you can make your lock screen's background a tribute to your most adored emoji. Here's how to do it. Any previous lock screen and home screen backgrounds will be saved here.

Apple iOS 18: Tired of your home screen? With Apple iOS 18, you can now fully customize and personalize your lock screen using ... even matching them to the wallpaper, and adjust their size ...