My phone conversations vary with the person on the other side of the phone. If it is an unknown number, I will respond with a questioning “hello? who is this?’ and go from there. If it is someone I know I start with a “hi” and an explanation on why I’m calling, skipping the introductions altogether. I use caller ID by looking at the phone and reading the number/name displayed. I usually pick up all the time. unless I am in a meeting, movie theatre, etc. I rarely avoid anyone ont the phone. I just never give those people my phone numbers. If I know I can reach somone using the phone, I’ll call. If I’m not sure if they are in a class or something I’ll send a text.