Applied online after my universities career fair. Very simple and straightforward first HR interview, followed by a case interview with some simple mental math and analysis. Final round was a superday at the headquarters, with a tour followed by three 30 min interviews and one long group interview with Excel

I applied through my university portal. I was contacted a few weeks later asking to choose a time for an initial call. We had a very brief call with some behavioral questions. I was informed soon after that they wanted to do another call, this time a case interview. The case interview consisted of a sales funnel, running percentage questions down a funnel and asking why I thought certain things could be the way they are. For example, how would signups for a phone plan differ over the internet than over the phone? After that, I was invited to a final interview in Charlotte on campus. They began with a tour of the campus, and eventually I had three back-to-back interviews. Two were brief cases similar to the ones I did before with behavioral sprinkled throughout. One was more a discussion about how I would run my own business considering different factors. Finally, there was an excel case, where we were given numbers in excel and had to fill in profits/figures and create simple equations. We then had to discuss our findings. I was contacted a few days later with an offer. Overall, it was a relatively easy interview process, and they took good care of the people they interviewed. It's a very cool, young company and everyone who interviewed seemed to really enjoy their jobs.