A bigger screen

Apple are expected to move with the times and upgrade the iPhone's standard 3.5-inch screen to a larger 4-inch Retina display. The iPhone's screen quality has long been a major selling point, but with its Android and Windows Phone rivals sporting 4.3 or even 4.7inch screens, the traditional iPhone screen size doesn't really match up.

If Apple engineers were able to pack four times the number of pixels into the 3.5-inch screen found on iPhone 4S and iPhone 4, we'd be surprised if the resolution doesn't benefit from a boost too. Reuters ran a story citing a source that claimed larger screens were being produced by three suppliers based in Korea and Japan.