How To Install APK File To Your Android Device

1. Copy the downloaded file (.apk) to your phone internal memory or SD card
2. Make sure you have configure your setting to allow apps installation from outside Google Play Store. To do this, go to Setting > Security, and tick "Unknown sources" option
   
   
3. Use "My Files" app or any other file browser app that you have and browse to the directory where you copied the downloaded file to.
   
4. Click on the file and install!