Play Built-in Game of Android Smartphone.

An amazing tip, many of you didn't know that in your android smartphone you have an built-in video game. If you want to play that game, just you need to do is that:
1) Open your android phone.
2) Go to "Setting".
3) Go to "About Device".
4) Tap 5-7 times on "Android Version".
Boom your android smartphone built-in game is open.
Note: Some times it take more tapping or some times less and other thing is that all android versions have different video games and some of them need more tapping or press and hold your finger when the game is start opening or loading. Most of them are offline and one android version has only one video game in it.