"Simple desktop", big font, let parents know more about mobile phones. You can click the "Simple Desktop" icon on the desktop-click the "Settings" icon-open "Set as Default Desktop", and then go back and start using it. Models without this software can enter the app store and search for "Simple Desktop" to download, install and use.
If you have more questions, you can go to official website /vivo Mall APP-My-Online Customer Service or vivo official website Web Edition-Slide to the End-Online Customer Service-Enter the manual customer service for consultation and understanding.