I've never head a phone anxiety. In fact, when we were little, my gf and I had a game: we were calling random numbers and chatting up people. And, the funny thing is, we often succeeded! I sometimes do not want to make a customer service call because I know the wait will be horrible, but that is not anxiety, that is just understandable procrastination.

What I do often have is anxiety about opening email messages. It got better with time, but I still sometimes fear what I might see written in a message. Has it ever happened to you?