How to change the background of mobile phone screen

Take Samsung S6 mobile phone as an example, the operation steps are as follows:

1. Press in the blank space of the mobile phone desktop.

2. After the dialog box appears, select "Wallpapers and Themes".

3. In the theme store, click "Wallpaper" in the lower left corner.

4. Click "View All" behind "My Wallpapers".

5. Select a wallpaper, and a dialog box will appear asking where to set it. Select the home screen here, which is the background of the mobile phone screen.

6. Ask again whether it is set as wallpaper, and click the button to confirm.

7. Back to the mobile phone desktop, the background screen has been changed to the selected picture.