PORTRUSH, Northern Ireland — There was a vacationer relaxing by the sea in Gothenburg, Sweden. A barista working somewhere near the Rock of Gibraltar. A semi-truck driver in Peru, Ill. An electrician ...

There's more FM stations on the air than ever these days. Where can you still travel to where the dials are nearly empty?

A whole bunch of smartphones out on the market today have FM radio capabilities – but their owners don't know it. There's no real good reason for this lack of knowledge save the lack of advertising on ...