The iPhone 3GS is no more. With the announcement of the iPhone 5 came the information that the iPhone 4S would move down the line and sell for $99 with two-year contract, while the iPhone 4 takes the spot previously held by the 3GS, making it free with two-year contract. Don't count the 3GS out just yet though, as its final trick will occur on September 19, when iOS 6 is released with support for the discontinued smartphone.