The nicely positioned second set of holes on the bottom of the Ip 7 LOOK like there is an additional speaker there and all the promo stuff says, "stereo speakers", but I suspect that there is still just one speaker in the bottom, in the original location and they use the top earphone speaker as the second one. I have an HTC 10, and it has a similar setup however the top speaker is only in use during media playback, not phone calls. I am wondering if the Iphone has the same setup? And why did they put the holes there? Cooling? Or symmetry?