T-Mobile Marketing Analytics Manager interview questions

I passed my resume to a T-Mobile employee at the career fair of a conference. Didn't hear back from him after two weeks so I sent a follow up email. He didn't ever reply back but in a few days someone from HR contacted me to schedule an interview. I talked with three people on the phone for 40-45 minutes. We went over my resume briefly. Afterwards, they had a case study question which took up the rest of the interview.