Why is Sprint 3G Extremely Slow On Iphone 5?

When I'm on 3G, no matter what internet connection does not work, going on the AppStore doesn't work, just to wait for a game to load it doesn't work! Like wtf? I'm truly lucky to have Wi-Fi, cause If I didn't I would lose it, but once I get off Wi-Fi, it's SLOW SERVICE! Sprint bills aren't cheap either, I have 2 iPhones on the same plan, what should I do please?

I would recommend contacting Sprint to see what the issue may be (it could be as simple as phone provisioning and programming).

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