Why doesn't my data work on my iPhone 4s?

Randomly, my iPhone 4s deleted a bunch of my texts yesterday. I can now no longer use data (Google, texts, youtube, etc). When I go to google, it says it can't load the page because data is turned off. I went to settings, and data is on. I turned it off then on again, and it still doesn't work. I'm going to take it to the store (I have Sprint, if that helps) and see if they can help, but I was wondering if there's something simple I'm missing.

Try to reset your network settings it may think your still romeing (sp)

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