The background image for your device, also known as the wallpaper, can be changed in settings. You can use your own image as a wallpaper or choose from the default images on your device. You can change the lock screen and home screen backgrounds.
From the Home screen, touch and hold an empty area.
Tap Home screen settings.
Tap Wallpaper gallery.
Note: For this tutorial, we're selecting static wallpapers. You can also select one of your own images from the Photos app.
Select a wallpaper.
Tap Set wallpaper.
Note: For this tutorial, we're changing the wallpaper on the Home screen. You can also change the wallpaper on the Lock screen.