How to install Android applications and games with .apk file format on Samsung Galaxy Note II? Besides getting Android applications and games from Google Play Store, you can get 3rd party Android applications from Internet (example, XDA Forum). All of them are in apk file format. Same apply to applications and games that backup with ES File Explorer. You will get “Install blocked ~ For security, your phone is set to block installation of applications not obtained from Google Play” when try to install them. No worry, there is a way to install Android applications and games in apk format on Samsung Galaxy Note 2.