A Wall Street analyst is claiming that the design for Apples next smartphone is already locked down and that when it arrives in September it will be with a much bigger display. As well as a hike in screen size up to 4.8 inches, the next iPhone will also boast ultra-fast wi-fi, just like the companys current range of desktop and notebook computers, or so says Timothy Arcuri of Cowen and Company. As well as a bigger screen and faster wireless internet, Arcuri says that much of the innovation in the next handset will come from new software services that bring together Apples Passbook (its virtual wallet for coupons, tickets and boarding passes, etc.);