Since former CEO of Apple Inc, Steve Jobs passed away we have seen various product leaks. Last time the iPhone 5 photos got leaked from the Foxconn factory and this time too the iPhone 5S photos have been leaked. The photos were first posted by http://sjbbs.zol.com.cn/2/30_11361.html.
These are still allegations and hence you can doubt the credibility of the source. From the images we can make out that the device is taller and definitely has a screen size greater than 4 inch. There are several websites claiming that the iPhone 5S has a 4.8 inch screen.
Well I feel the size has been increased to achieve better screen resolution. As Retina display basically means 2x the previous screen resolution. iPhone 4 doubled the screen resolution to 640×960 from 320×480. iPhone 5 brought in a 16:9 aspect ration with a screen resolution of 640×1136. So we can expect iPhone 5S to have a screen resolution of 1280×2272.
The internal hardware images show a larger battery. iPhone 5S is also expected to be packed with 2GB RAM and a quad core processor. The rear camera should be 13 megapixel while front 2 megapixel.