Wi-Fi can slow to a crawl in a crowded café even when the fibre connection is fast, because 2.4 GHz offers only three non-overlapping 20…

The reason a café Wi-Fi crawls at lunchtime isn't bandwidth or the router being "overloaded" — it's that every device in the room, and often the room next door, is politely queueing to speak on the same slice of radio spectrum.

By How It Works · Aug 7, 2026