You cannot. Why would you be able to? Everytime AT&T sells a iPhone 3G, they pay Apple $425 (so the iPhone 3G is actually more expensive than the original). So think of Apple selling the iPhone 3G to AT&T for $425 and AT&T is selling it to us for $199. AT&T cut the price to draw more customers. To make up for the huge price difference, they're making the iPhone 3G in-store activated (like all the smart phones), raise the data plan to $30 per month (instead of $20), and Apple is no longer taking a portion of the iPhone's monthly bill from AT&T. However, AT&T is going to allow non-contract iPhone 3Gs later in the year for $599/$699. Of course this definitely surpasses the $425 and $525. On July 11th, however, you need a contract.