IPhone 4S Upgrade or Exchange for iPhone 5?

I been having the iPhone 4S 64GB since April. But the thing is can i upgrade to the iPhone 5 in anyway even thou my contract hasn't end?

Probably not. Unless you break your contract then sign another but that may cost quite a bit. But if I were you I would sell my 4S now while they are still in demand because once the iPhone 5 comes out the 4S is gonna be a thing of the past