Next-generation iPhones likely to focus on internal improvements.
There's Still Another Prototype iPhone in the Wild
These images were posted by a Chinese user's twitter account back in February. The design of this phone and the leaked prototype iPhone are practically identical -- but not entirely so. A close look at the bottom of the phones show some clear differences:
The left image reflects the original Twitter leak while the right shows the Gizmodo leak. The first image has no visible screws on the bottom of the device. The original images also don't seem to have the Apple logo on the back of the device, or even the iPhone name printed on it. We're not sure the significance of this, or who might have possession of this other device, but it seems more of these unreleased iPhones are out there in unauthorized hands.