Unable to connect my iphone 4 to my home Wi-Fi?

I just recently got given someone's old iphone 4, before i reset it i synched it up with my Wi-Fi jut fine, however when i put it back to the factory settings and tried to connect to my Wi-Fi it doesn't work, instead the wheel thing just keeps spinning round and has done for about an hour. It says i'm connected to the Wi-Fi yet it says 3G at the top, i've tried forgetting the network and reconnecting but it just doesn't seem to work.

Well if your Wi-Fi not working then you have other problems that very but for your mobile connection it depends on service and where you all and stuff
for Wi-Fi- restart your router
for mobile- try moving around to get a different signal

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