T-Mobile finds that NPS increases with proximity to customer interaction -- it rises significantly (as much as 70%) immediately after a visit to a store, and then begins to drops back as time passes. Without the positive reinforcement, NPS drops back to nearly 0% over a few months. Lesson -- pay attention to customers!
"Pay attention to customers"? What do you mean by that Andy? Meaning, pay attention to them while they're in the store? Does T-Mobile aim to bring customers into stores more often as they seem to have a good experience there? Or are they looking for ways to improve the experience beyond the store?