My iPhone 4S won't connect to the Internet without Wi-Fi?

I just got an iPhone 4S yesterday, and everything was all fine and dandy until I left the house, and I couldn't get on the Internet. The 3G is turned on, so is cellular data, along with a sprint data plan. I also can't set up a voicemail either? Any tips?

Maybe the service tower is down or you haven't paid your phone bill… I don't know, those are just suggestions

You are most likely not on a data plan that supports internet and you need Wi-Fi

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