Iphone 4 Won't connect to Internet no matter what.

I've tried pratically everything besides laying a hand on my router.

I've resseted everything.
I've reseted the Network.
I've reseted the phone
I've turn off the phone.
I've entered the password correctly a million times.

All I get is the message "unable to connect"

All of my other devices such as my pc, my 3g, and my Android are sucessfully connected to the internet.

Any Ideas?