Fingerprint Crack Screen Joke - Powerful trick on your friends! Suggest to friends unlock your phone via a fingerprint scanner and see what will happen! The application looks like a normal lock screen through a fingerprint. But when someone tries to unlock it - boom! The screen will crack with a specific sound, will noise, the screen freezes! Of course it will not be in the present, it is only a graphical effect, but it looks very much believable and able to surprise the ignorant man. Do not worry, your phone or that is not threatened, Fingerprint Crack Screen Joke - just prank application. There is a possibility that a crack appears in the first try, then just need to try again. Good jokes you!