Phone calls are synchronous. If I phone someone, I have to commit to (usually) an hour of my life to get the problem solved. Email is asynchronous. I can send

Phone calls are synchronous. If I phone someone, I have to commit to (usually) an hour of my life to get the problem solved. Email is asynchronous. I can send the message and then get on with something else while waiting for a reply. I loathe phoning support.