I did a phone interview for the CP and another one for my PI. (EDIT: I should mention these were in 2010. Not sure if the phone interviews have changed at all since then.) Both of these covered mostly general questions, like talking about yourself and your background, and I got a few “what would you do if”-type scenario questions.
I definitely second having notes in front of you. I knew ahead of time what I wanted to make sure I talked about, but in the moment I was so excited and nervous that I kind of blanked, so it was really helpful to be able to just look down and get right back on track. Also, smile while you talk, even if you feel silly. :happy:
Good luck! Do you know when your interview will be?