Jailbroken iPhone 4 no data plan, free 3G?

I have a jailbroken iPhone 4 and don't have a data plan. Is there a Cydia app that I can download to be able to access the 3G features like Internet on the go without the need for Wi-Fi? And that I don't have to pay for, of course?

Wow I don't know that even happens

How is that possible? You can't just get internet… Lol. Thats juts like saying, "can I get gas when driving on the highway, without stopping and paying for it?" Does gas just appear?

No there's Noway

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