In the end I had to replace my phone -- though it took them two visits and multiple reinstalls of my software to "determine" that the problem was as described infinitely above, and that the problem was a dead or dying internal mic. I pointed out that it must have been that way while under warranty, the problem only evident once I upgraded the software which revealed it, as I am far from being the only one, and that I shouldn't have to pay for a replacement, but of course that went nowhere. So in the end I pay almost six hundred dollars, full price, for two years of an iPhone. I try not to be so cynical as to accuse them of making us pay millions in profit to replace a bad batch of phones they knew would die in those areas as soon as they were upgraded. The problem is so specific that it is obvious they must realize it is real, but their lack of response to the problem is deafening.
Fortunately I buy my equipment with my Amex Gold card that doubles the warranty length, so they will likely pay me back the $292.00 it took to get a replacement that does finally work under iOS7. But it is likely the last Apple product I will buy. They have gone to a totally consumer market, make all their money licesning songs and media an selling devices to play themon, so they don't support art and video professionals who made them so popular anymore. My next computer will be a PC, chearper and faster than the new Mac Pro, and as I am now on the Creative Cloud, I believe I can just download the PC versions of all the software I work with. It's been a good thirty year run, longer than anything but some old friendships, but they really just don't care, even less than they have for the last thirty years. I always loved their product, but hated their business model and customer support, and this has been the last straw. When everything dies, I am moving on when it comes to replacements. I am an Apple user, but think I am no longer an Apple customer.
Sad.