Call interview in the beginning. Promised to call back by the end of the week. No response at all. It's been a month. The recruiter asked many questions and explained specific description of the job.
Face to face interview. The HR was very nice and introduced me a lot about the company culture. Got an offer next day by e-mail. Good experience, and look forward to the internship there.
I applied through a recruiter. The process took 2 weeks. I interviewed at WPP (New York, NY) in Mar 2017
Interview
Started with one short phone interview that then progressed into going to the HQ in New York and meeting with 5 separate people to see if you might fit in well underneath them.