Photos of the iPhone 5S rear housing have allegedly leaked already. MacRumors observes the part is “extremely similar” to the two-tone design of the iPhone 5.
This iPhone 5S part is, however, distinctly different from its iPhone 5 counterpart in several ways, most obviously in the arrangement of the screw holes for attaching the logic board.
Here is a side-by-side comparison.
Notice the difference in the logic board screw holes layout of the iPhone 5 (right) and the rumored iPhone 5S (left).
Other subtle differences can be seen marked on the above photograph.
It seems that the pictures were taken at the assembly line of an operation stage. The photographer has showed the front and rear side of the housing, which looks very similar to the iPhone 5. However, the reason why we say it is a suspected iPhone 5s rear housing is that the specific information below the logo, which are replaced by “X”. Usually, the parts with “X” stand for test prototype.
Inside the rear housing, we can find some changes when comparing it with iPhone 5. First, the “iPhone 5s” has two less screw holes on the left side which are used to fasten the LCD. Second, the position of 3 screw holes used to fasten the logic board has been removed (not sure whether caused by the change of logic board).
Notably, the Commercial Times said Apple was set to begin trial production of the iPhone 5S in December with initial runs of about 50,000 - 100,000. A separate report also predicted the release of the next iPhone in mid-2013.