I was interviewed over the phone for a first interview that lasted 30 minutes. The interviewer was the recruiter who said his job was to pass the information that was gathered from me onto the hiring manager. The first 10 minutes was about if I was interested in relocating to Wilton, CT. The next 20 was dedicated to asking questions about my resume. The last 5 minutes was open to questions that I had. The best way to prepare for the phone screen is to know the resume like the back of your hand. Especially the experiences that seemed to have happened ages ago.