I'm an existing AT&T Customer not on an iPhone I will be getting the iPhone when it comes out in July. Since I'm already a customer there is a "Existing Customer" Plan where I pay 40 a month (for unlimited data, text, and adding visual voice mail) on top of my already established plan. With the new release of the 10 dollars more plans for 3G will I now have to pay 50 for my plan or will it stay the same?