How can I play Pokémon GO without Internet?

I downloaded Pokémon GO on my Samsung Galaxy Express and I can play it at home, but when I go outside I can't play because there is no Internet.

How can I play Pokémon GO without Internet outside?

Quite simply, you can't. The game requires an internet connection.

_{This is an attempt to build on the obvious "you can't" answer.}

Many cities around the world are funding infrastructure projects to connect their cities with free, public WiFi access points. The LinkNYC project is a perfect example of this, as their goal is to work with the New York City government to add WiFi kiosks to every street corner.

I have successfully played Pokemon Go on a device without cellular connection by walking between LinkNYC hotspots in Manhattan.