Personally I hate phone calls and they cause me a certain amount of stress. I am used to consciously and unconsciously reading the hundreds of little social cues that the other person gives in a face-to-face conversation (how they are feeling, how they react to new data or do they already know all the details), and the lack of that information feels horrible. I get the same feeling when talking to people who wear sunglasses. Emails are a lot easier because they lack the real time element and you can more carefully read both the original mail as well as your reply. For me the only way was to get used to speaking on the phone to people I talk to in normal face-to-face conversations because I already could read a lot from their tone of voice and inflections. I still hate the voice part of my phone though and tend to ignore numbers that I don’t recognize— look for an app called TrueCaller, it helps figure out who is calling you at any time.