[bede]

> There’s another distance limit at work here, and that is the speed of light. It takes milliseconds for the signal in your phone to reach the hotel above ground and be handed over to the mobile network.

It takes roughly 100us for light to travel 30km – Can you explain how the speed of light is relevant here?

[mianos]

.. and in 1mS it travels 300km. Maybe they just want to sound technical, somewhat to match the rest of the article. They certainly didn't use chat gpt, so maybe that's a good thing.