The newest generation of the iPhone has now started shipping to fulfill pre-orders . The changes made to the new version of the phone are quite drastic, including a thinner and lighter design, 4-inch retina display screen, ultrafast WiFi, and a pre-installed IOS 6 system. iPhone 5 sales are expected to cause a boost in GDP sales by $12.8 billion annually just on the iPhone 5 and accessories alone, according to the L.A. Times.