Through the settings, you can enter the desktop, lock screen and wallpaper for settings. I'll tell you how to set the wallpaper. Take the mobile phone model: vivo y3 1s as an example.

The specific operation steps are as follows:

1. First, open the settings on your mobile phone to enter.

2. Then click on the desktop, lock screen and wallpaper below.

3. Then click on the wallpaper below.

4. Then select the wallpaper to enter.

5. Click Apply to set after input.

6. Finally, click on the desktop to set it.