t-mobile

Building the future of T‑Mobile's app through innovation and foundational transformation.

We’ve partnered with T‑Mobile to support a complete transformation of their consumer app, T-Life. This bold reimagining has created a unified, personalized, and customer-first platform that’s relevant today and built for tomorrow.
Product DesignWebAppArt DirectionDesign SystemMotion
Webby Winner, 2026
Webby Winner, 2026
AI Best Use of AI Voice & Conversational Interface
30M
Active T-Life Users
#1APP
In lifestyle
4.8
App store rating
The Challenge

Redefine commerce and service, in one unified app experience.

A simpler, smarter, super app.
Working closely with T-Mobile's design and product teams, we transformed T-Life. The new app uses AI to create personalized customer journeys at scale, resulting in higher engagement and significantly reduced support costs.

Aligned, streamlined design system.

Arrow, T-Mobile’s best-in-class design system, unifies its vast digital ecosystem into a single, flexible front end language. Working closely and iteratively across the org we created and implemented this design foundation to help teams ship faster and smarter. The culmination of years of partnership, Arrow enables universal brand alignment while scaling with the brand as it grows.
AA+
WCAG compliant
1K+
Components with tens of thousands of variants

From scroll to sale in seconds.

We redesigned the shopping experience to make buying faster, smarter, and more personal. By streamlining flows and removing friction points, we reduced checkout screens by 63%. Behavior-based product pages and AI-driven recommendations streamline the customer journey, making every step in the purchase faster and more intuitive.

AI‑powered. Customer‑centric.

T-Mobile's customers don't use telecom jargon. They think in real questions. "Can I afford this upgrade?" "Why is my bill different this month?" Previous chatbots couldn't keep up. So in partnership with T-Mobile and OpenAI, we designed an AI assistant that doesn't just process requests — it understands them.

Powered by generative and agentic AI, the assistant guides customers through complex transactions in natural, multi-step conversations across 57+ languages.

The result

2x
Better AI sentiment than competitors
57+
AI supported languages
e.l.f. Beauty
Next Up:
e.l.f. Beauty

Changing the way beauty does business.

HAVE A PROJECT?

Let’s chat

We are part of the Code & Theory family of agencies and the larger Stagwell Global network.

One World Trade Center, 69th Floor, New York, NY 10007

Remote. Or IRL in NYC, SF, LA, Portland & Austin.

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© 2026
T-Mobile | Design System, Website, Mobile App | Kettle Work