Tool: iPhone 7
1. Find the option named "Wallpaper" in the menu bar of mobile phone settings, and click Open.
2. Find the option named "Select a new wallpaper" in the wallpaper interface, and click Open.
3. Find the "dynamic wallpaper" indicated by the arrow in the selection interface, and click Open.
4. In the dynamic wallpaper selection interface, select the appropriate dynamic wallpaper and click Open.
5. In the dynamic wallpaper setting interface, click "Settings" in the lower right corner to complete the dynamic wallpaper setting.