There have been rumors for quite some time that iPhone 5 will come with a larger panel, 4.2 inches perhaps. DigiTimes reported on August 29th, citing sources from upstream panel suppliers that the iPhone 5′s panel size will still be less than 4-inch. These sources state that the iPhone 5 will have a 3.5 to 3.7-inch panel with a new, thinner bezel design that will make the screen appear larger.
Also, iPhone 5′s back design will be changed to a metal chassis instead of reinforced-glasses. The alleged leak from Switzerland also suggested that the new iPhone would also include an HD touch panel, an 8 megapixel camera, full HD video recording, an A5 processor, and a new ultra-thin industrial design.
According to sources, however, those specifications were only rumored expectations, and the next iPhone will actually be very similiar to the iPhone 4 with regard to specs and components. And screen size, apparently.