T-Mobile’s NPS-Centered Transformation
In telecom, the dance follows the same rules almost everywhere: either you own the best network and charge customers a premium, or you offer affordable prices and let quality and experience slip a little. In an industry where this dance is largely the norm, T-Mobile US is shattering that law of physics altogether.
It’s peak season for investor presentations and meetings reviewing the fourth quarter of 2025. We’ll look at T-Mobile’s fourth-quarter 2025 results and at how the company’s new CEO, Srini Gopalan, has skillfully placed customer experience at the very heart of its strategy. What emerges is an inspiring, mold-breaking approach that blends technology with the human touch.
The Foundation of Everything: NPS
At the most recent investor meeting, Gopalan described NPS as the foundation of everything the company builds. This isn’t just polished corporate rhetoric. T-Mobile has managed to push its NPS to 79 in the stores it operates itself. That is 16 percent higher than at third-party dealers, which is exactly why the company is choosing to rely less on intermediaries and to invest in its own stores and in the warm, direct connection it builds with customers. (For some reason, our article Starbucks’ Big Comeback sprang to mind.)
Network quality or a price advantage alone isn’t enough to build loyalty. By widening its lead over rivals in customer experience, T-Mobile is proving beyond doubt how much people care about the way they’re treated.
Digital Transformation Through the T-Life App
One of the biggest drivers of this transformation is the company’s T-Life app. Launched in 2024, the app reached 100 million downloads in a very short time. Every month, 24 million customers are active on the app, using it four times on average. The platform is no longer a simple bill-payment tool; it has become the main gateway to the customer’s relationship with the brand.
The operational impact is truly enormous. Just a year ago, only 22% of device upgrades went through the app, all of them with an agent’s help; today 73% of upgrades happen in the app, and customers complete 39% of upgrades entirely on their own, without any assistance. It is the best illustration of how much freedom you can give customers when you hand them the right digital tool.
The crux of the story, though, lies in the company’s approach to efficiency. To cut costs, companies usually focus on slashing headcount or trimming customer service budgets. T-Mobile is taking a completely different path. It is reducing customer contacts by fixing problems at the source and equipping its frontline employees with better technology. Support contacts per account, which stood at 7 in 2021, have fallen to 3.3 today, and the company aims to push that figure much lower.
At the heart of this strategy is IntentCX, the AI infrastructure the company developed with OpenAI. The aim is not to use AI to build a wall between the company and its customers but, quite the opposite, to make the experience unique and personal for every individual. Thanks to this vision, the company expects a massive $3 billion in savings by 2027. And it is achieving this not by lowering quality but by empowering employees with the right tools.
The Financials Follow the Experience
All of this people-centered, empathetic thinking is also feeding straight into the company’s coffers. In the fourth quarter of 2025, postpaid service revenues rose 14% year over year to $15.4 billion. Total service revenues grew 10% to $18.7 billion. T-Mobile is currently growing four times faster than its rivals.
Here, once again, we see the simple truth we CX professionals have always believed in. When you genuinely invest in customer experience, digital convenience and your employees, financial success naturally follows. There are very valuable lessons here for Turkish telecom and retail companies. When you position technology and people as complementary forces rather than rivals, you always come out ahead.
This piece was first published in Turkish in CX Bulletin on February 21, 2026. English translation.