As an estimate, about how much would an iphone 5 cost me per month with AT&T?

I've just been using a cheap AT&T phone for the last 2 years and my contract will run out this December. I'm interested in buying the Iphone 5. No one in my family has an iphone so I know that will play a part in how much i'm spending. On average how much would I be paying per month? Would it be cheaper to buy an Iphone 4?

Depends what options you choose, check the choices on their site

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