How To Change Your Phone Wallpaper. 3 Tap Explore more wallpapers. Do any of the following.

Next tap on Choose a New Wallpaper to change either your Lock screen or Home screen wallpaper. First go to your Settings menu and select Wallpaper. The wallpaper is instantly changed for the screens you chose.
If your device is running a previous version of Android the steps may be different.
Choose a preset image from a group at the top of the screen Dynamic Stills and so on. Any time you tap the icon it will change your wallpaper. First go to your Settings menu and select Wallpaper. Pixel 2 later.
