1) T-Mobile conducted an ethnographic study of their "inspirational consumers" - highly engaged customers who advocate for the brand - to understand how they integrate mobile technology into their lives.
2) The study involved in-depth interviews and observations of three consumer groups over three months to understand their mobile usage behaviors and how these change during life transitions.
3) T-Mobile was able to gain valuable insights into these consumers and identify opportunities to better meet their changing mobile needs, particularly around mobile internet services, which helped reduce customer churn.