Photos of what seems to be the iPhone 5S’s external case were leaked over at iPhone5parts.net and publicized by ETrade Supply.
The back plate bears an identification number that is replaced by an X, suggesting that it is a prototype.
In some images, the FCC ID and the model number of the device have been marked out.
In addition, the rear shell appears to be very similar to that of the iPhone 5.
The inside of the phone shows a few small differences, such as the placement of the screws.