OK, I don't own one and I have only picked one up in the local Apple store and admired its looks. So I haven't actually used one, but I still very much want to upgrade to one when I can work out the best plan (why do they make them so compliqué?)
The point is, I will buy a case for mine so that when it accidentally falls on a concrete floor it won't get damaged. Apparently a case (or bumper as some want to call the device that separates sweaty palm from antenna strip) is all that's needed to prevent calls from dropping. Problem (what problem?) automatically solved!
And I was sure other smart phones have similar problems. A search revealed several models do indeed have similar problems.