Rumors of an iPhone 5 with a four-inch display gained support late this week with a sighting of what might be its first identifiable part. A touchscreen digitizer layer shows the outline of an iPhone but with a noticeably larger, edge-to-edge screen. iDealsChina's snapshot from an unidentified Chinese firm suggests it would otherwise be superficially identical to the iPhone 4, although it's presumed Apple will make changes to improve the antenna performance.
