To install Unknown application in your Vivo mobile phone you have to make simple changes in your mobile phone setting. The unknown app means Apps downloaded from outside of play store.

Now Check the simple method mention below.

  • Goto Setting.
  • Then More Setting.
  • Then Click On Application.
  • Now Click On Installed Unknown App.
  • Tick ✔️The Mark.

For any other mobile use these steps.

  • Go to Setting. 
  • Then click on the Security tab.
  • Check the option "Unknown sources".
  • Tap OK on the prompt message.
  • Select "Trust".

Install Unknown Application In Any Android

If you do not find the about setting then comment with your mobile phone model. We will help you.