Apple's fifth generation iPhone will feature a thinner, tapered design, an edge-to-edge screen and maybe even a touch-only home button, according to a variety of leaked phone cases, reported.

The first two leaks come via William Judd at UK site Mobile Fun, who received a CAD design document from a Chinese case manufacturer, and a case mock-up photo, both of which show a radical evolution of the iPhone design.

This radical evolution includes a significantly larger screen, possibly four inches, up from the current 3.5-inch screen. As we've heard in the past, the screen extends across the entire front of the device, with little or no bezel on the sides. The top and bottom of the iPhone 5 still have bezels, though Judd said they have "been significantly reduced in size."

The next iPhone will probably replace the physical home button with a larger touch ovaloid area which takes up the middle half of the bottom border. This area could also be used for multi-touch gestures, Judd said. The controls on the side of the device have been entirely repositioned, from the left to the right side of the device. Judd said it is possible that the volume and lock buttons have been entirely replaced with touch controls. 

Now it looks like the actual launch will come in September, so we'll have to wait until then to see whether the speculation is true.