We recently reported about the leaked cases which are rumored to be made for the next iPhone.
The images showed that the new device will have a modified design, but also a smaller dock connector and a headphone jack on the bottom of the device.
9to5mac, who posted the leaked images, now claims to have information from sources inside Apple that say these cases are in fact prototypes that are internally being tested by the company at present.
The new dock connector and the headphone jack seems to be found in at least one of the prototypes tested by Apple.
The remaining changes, except the 4 inches screen, are yet unconfirmed.