If I have a 2 year contract with AT&T?

I have an iPhone 4S and I want to either get an iPhone 5 or another phone can I? Like I guess start the contract again? Or would I need to pay the full price?

You would have to pay the full price for the phone. I would wait until your contract is up. Its not a difference that you need to pay that much for. I got a iphone 5 as soon as they came out & now I'm using my Iphone 4s again because I didn't like the Iphone 5