We download all Android apps from Google play store. If we want to install apps from other sources like (Mobogenie, Mobo market, APK Share) and from backup on SD card then we need to enable Unknown-sources option, Otherwise you can’t install app from external sources. For security it is already disabled. If you have any other source to download apps & want to install on your Android smartphone, you can not install the app. Therefore it is necessary to install the Android App from the external source to enable Unknown-sources option. So today I’ll tell you how to enable & disable Unknown-sources option in android smartphone.
How To Enable Unknown Sources
1- Open Setting in your Android Smartphone.