Can I buy a iphone 5 even though contract not up?

I have a samsung note and would like to get the iphone 5. I have at&t.

Of course you can! Why not? But it could be rather expensive. Just depends if you are prepared to pay.

Yea but its really expensive, and if you have the two year plan its even more expensive. - Were talking like $800

Ya. But it will cost 700 dollars.

I work for AT&T and you can upgrade at anytime BUT it is going to costs you and may extend your contract. If you buy an unlocked iPhone 5, it's as much as $1200.