IPhone 4 won't connect to internet or iTunes?

I have an iPhone 4, and while it connects to the Wi-Fi and 3G network, I can't access the internet. Basically I see the little symbol and there's full bars but when I try to access anything internet related (safari, email, twitter, etc) nothing happens.

iTunes doesn't recognize my phone either. When I plug it into my laptop it just says "iTunes could not connect to this iPhone. An unknown error occurs." But I can still charge my phone and get photos off of it.

Any ideas? I can't get a new phone until the iPhone 6 comes out so I'm stuck with this for another month.

Contact tech support by dialing 611

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