My thinking was that since I keep an iPhone back-up on my iMac I could go to a pre-8.2 computer state and then ask iTunes to restore the phone using that back-up, but I guess the back-up does not keep a copy of iOS.
I'm having the same problem many are having (about a dozen or more threads here) in that my iPhone won't properly connect to my car audio system via USB. Actually I have two different makes of cars and it won't work in either one. The car audio system reports no music files found, even though it does find and correctly identify the iPhone. Sometimes I can get audio to play by starting the audio on the iPhone, but fooling around with your phone while driving is a good way to get into a crash. Many fixes have been tried; none have worked. I guess we're just going to have to wait for 8.2.1. When some software companies release a buggy update, I'm not too surprised. I've come to expect better from Apple.