I pretty much always pick up and just say "Hello?" cluelessly, out of old habit (or for work calls I say, "This is Sapph"). Plus it just feels a little weird, unless it's someone calling that I am super close with, to assume that it's actually that person on the other end of the line, but maybe it's just me. With landlines anyone can pick up that phone and call you, not just the person whose name is on the Caller ID. And, I've had calls from friend's cell phones and it ends up being their partners or siblings who are actually on the other line...or they've got me on speakerphone and there's a few people in the room. So, I don't know, I just don't want to assume most of the time. Let them tell me who is actually calling me.
I just had a friend bring this up to me when he called me, saying "You know it's me calling you, don't you? When you pick up you don't sound like you know." So that prompted the curiosity on what other people do.
How do you answer the phone?
(Finally mostly over covid, btw - it really knocked me out for a good while there but thankfully wasn't too bad.)