1. Open the wallpaper application of Apple's mobile phone and click the search icon at the top right.

2. Click to enter the native iOS wallpaper, and then select the wallpaper you need to use to enter.

3. After entering the wallpaper details, click the download option at the bottom left.

4. After downloading, open the photo application of the mobile phone to enter. After entering, select the downloaded original wallpaper to enter.

5. Click to enter, select the icon at the bottom left of the wallpaper, and select the option to use as wallpaper.