I had three phone interviews for a position. The first was excellent, I was asked great questions and it felt like a good conversation in which I learned a lot about the company and vice versa. The second was a bit awkward but mostly ok. The third was very awkward, as I was not asked any questions but just told to ask the interviewer questions, for a full hour. The interviewer seemed a bit distracted. There were several scheduling issues throughout where it did not seem like HR and the team were communicating. On the whole, though, it was generally a pretty 'normal' interview process, with the usual questions, and no brain teasers or trick questions as other here have mentioned. Unfortunately I never got to the in-person interview stage.