The bubble on the home screen of the iPhone is the mobile phone's dynamic wallpaper, which can be set in the \"Wallpaper\".
First, open the \"Settings\" on the mobile desktop.
2. After entering the \"Settings\" page, find the \"Wallpaper\" and click to enter.
Third, then click \"Choose a new wallpaper\" in \"Wallpaper\" to enter.
4. Click \"Dynamic Wallpaper\" for the next step.
Fifth, select a suitable \"wallpaper\" in the \"Dynamic Wallpaper\" to operate.
Then click \"Settings\" in the lower right corner.
Seven, finally select the screen page that needs to be set to complete the operation.