Excerpt from this article:
Sure, the voice-calling function on your phone may now be one of the least important things on there — somewhere behind texting, Google, Facebook, etc. — but it’s still not something you can really avoid completely. For every app that promises to save you a call, there’s a situation that requires one: You can book a restaurant reservation or a doctor’s appointment online, but you need to call when you’re running late. You can email a job application, but then you have to wait for the special type of hell that is the phone interview. You can blanket your social-media accounts in political posts, but they don’t count for much if you don’t contact your elected officials, too.
For some people, that’s no big deal. For others, though, picking up the phone takes a Herculean effort: You rehearse what you have to say a thousand times, you dial with shaky hands, you get a panicky feeling in your chest when you hear a ring on the other end.