Hey! Ok so I am getting an iPhone 4 very soon! So my parents just got divorced so we are switching phone plans and going to AT&T I really need help with this whole iPhone thing. All right I need to no the cheapest deals u can get with the iPhone 4. All right I know u have to pay monthly for it, how much is that, like what's the cheapest stuff u can get for Llike the data plan. I no there is a $15 on and a $30 one. What is the difference? Idk if there's more suff u have to pay for it! Plz help me. Thanks!!!!