wi-fi works on trains, so it is thought

Guy Kewney reports that wi-fi has been known to work on trains to Scotland, but he has yet to actually find a train he can travel on.

http://www.guykewney.com/articles/041011-gner.html

My guess is that a lot of wi-fi is like this. It can actually work but for a lot of reasons few people use it.

Exeter is no exception to this.