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Block installation from unknown source.

How do I block installation from unknown source or SD card in android 8.1?

Tech Wizard

Hello, @user1529268109019 try searching for the "Special App Access" through search option on top of the settings then tap the "Install unknown apps" then you can block app installation from unkown sources like chrome, gmail etc. if you like. Sorry I don't think there is an option to block installation from sd card. Thank you.

settings -> Apps & notification -> Advanced-> Special app access -> Install unknown apps... there u can select which app will have access to installation from unknown sources.. it's per app now instead of a single button to turn it off/on for entire rom like older android version....

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