There is no antenna on these pictures, and since the case appears to be metal, there would have to be a plastic cover over the antenna as on the original iPhone, on the bottom of the back since this area is exposed when holding the iPhone to your ear to talk. Also, there are speakers where the antenna is supposed to be, on the back of the iPhone. The speakers are on the bottom of the original iPhone so that they reflect off your hand towards the user as you hold the iPhone. Putting them on the back would loose the sound in the palm of your hand or at best put them facing away from the user.