Apple should be able to fix in software the dropped calls due to antenna attenuation (holding it in the corner) but, I'm not sure how they can fix in software the low bar display (i.e. The phone will not drop calls while holding the corner but the meter will still show no bars when holding the corner).
It's not simple antenna attenuation. It's because you are shorting out two antennas. How is Apple going to fix it ? But wait, Apple says there is not a reception issue. So nothing to fix or stay tuned for. LOL