Prepaid eSIM App

Launched in 2018, the T-Mobile Prepaid eSIM app delivers a fast end-to-end activation for travelers. Simply download the app, choose your plan, make your payment, and you’re instantly connected.

In 2024, the T-Mobile Prepaid eSIM App reached 223,000 activations, marking a 22% increase year over year. The app generated $6.3 million in annual revenue and drove 61% of all T-Mobile digital prepaid activations

  • No formal requirements

  • The T-Mobile Prepaid eSIM app is a web-wrapped app meaning it is a a mobile application that contains a website or web application within a native software container. This presented design system challenges that offers different components for app and web, plus other design considerations.

  • Designing an app for travelers meant that the design and copy needed to be simple and easy to understand, even for non-native speakers.

Design Challenges

My Role

I owned all UX and UI design responsibilities on this project. I collaborated with:

  • Product to help understand project needs and gain a deep understanding of the app functionality

  • my Design Project Manager to determine and keep on track of deadlines

  • Content designers to improve copy

  • Research to plan for usability testing

  • the Accessibility Research Center (ARC) to improve accessibility and get approval on accessibility annotations

  • the Prepaid design team for feedback

  • the VP of Design for approval

  • Dev for tech check and hand-off

What I did

  • Update look and feel, plus update design to use T-Mobile design system components

  • Update plans

  • Add account PIN creation

  • Add port so user’s can bring their phone number

  • Update copy

  • Improve accessibility

  • Simplify legal copy and patterns

  • Decrease drop-off rates and increase conversion

Design approach

Designed through continuous iteration and testing

Next Steps

  • Dark mode

  • Multi-language support

  • Multi-line (phone numbers)

  • Apple Pay, PayPal, Venmo, and GPay functionality

  • AutoPay

  • World Cup rate plans

In the future, we plan to add:

Outcome

Coming soon! The development on this project is currently paused as upper management decides the future of the app.