Try telling that to a couple of million people (minus you) that their phone isnt defective. Even with my iP4 in a very strong signal area can kill the service by holding it with my left hand. Most of the time is "okay", but I've had plenty of dropped calls from it.I know how to recreate the problem. Just using the term everyone else made up. I think this is all BS. The phone has never dropped a call for since I got it almost 3 weeks ago. Not 1 dropped call. Not even from a supermarket that I never could get a signal from before.
Maybe you have a weaker resistance through your body and is having far less effect on your phone. Everyone is different. All this "signal bar" is a short ploy TBH. What's the point having the retina display and then Apple having to "enhance" the appearance of the first 3 bars? Let's wait patiently for the massive recall guys and gals. It will happen.