Exactly my problem, too. As for the voicemail, I turned off that feature on my phone. It’s better not to have one when I never use it. That way no one assumes that I’m going to listen to their message and call them back. I think it’s hard to talk on the telephone because there are no visual cues to help keep me engaged in the conversation. I am also so afraid of messing up, spacing out during bits of the conversation and getting things wrong and because I can’t see the other person I won’t know that something is wrong. And it’s so easy to get sidetracked.