The trade fair problem
Germany runs the biggest exhibition calendar in the world, and Messe halls in Frankfurt, Hannover, Cologne and Dusseldorf are among the hardest places anywhere to get a usable connection. Tens of thousands of people in one building, all on their phones, all at once. The venue Wi-Fi buckles, and a data plan you can actually rely on stops being a convenience and starts being the thing that lets you work.

