Location experiences
T-Mobile Coverage Map.
I led the end-to-end design of location-based consumer experiences inside T-Mobile's 140M+ user ecosystem, including the Network Coverage Map, Coverage Route, and International Roaming. The work translates complex geospatial and connectivity data into interfaces a normal person can read and trust.
User ecosystem the experiences live inside.
Annual users across these high-traffic products.
Check the Coverage Map each year, 3.6M deciding whether to switch. [confirm]
High traffic, low understanding
The coverage map is one of T-Mobile's highest-traffic pages — where prospective customers verify service before deciding to switch. Yet a 55% churn rate showed people couldn't read it well enough to answer the one question that matters. Leadership flagged it as a top priority, and I owned the redesign end to end.
Will T-Mobile work for me?
The question behind every visit
Coverage layers were hard to interpret.
Technical terms and dense legends got in the way.
People couldn't confidently answer "will it work for me."
From an unreadable map to a legible one
Limited usability, low comprehension.
People struggled to interpret the coverage layers and details.
A clearer map, a plain answer.
+65% comprehension · +35% usability
A location system, not a single map
Coverage Map
Signal strength and network type read instantly, without hunting through a legend.
Mobile and responsive web share one visualization system.
Coverage Route
Coverage along a journey, not just at a fixed point.
International Roaming
Where and how service works abroad, made clear.
Making real-time network data readable
I translated large-scale, real-time network and geospatial data into a visualization that supports a confident decision at a glance, replacing jargon and dense legends with plain language and clear layers.
Easier to read, easier to trust
A map is data until someone can read it. The win here was legibility: turning real-time network data into a plain answer people trust.
Soojin Hwang · Lead designer