As a frequent worldwide traveler I find it quite annoying when I come to big cities (such as that hosting the next summer Olympics for example) and the tube system is lacking wireless network coverage. The issue is more prevalent in some countries than in others and now a recent study by the New Cities Foundation on where tube systems have coverage sheds some interesting details on this topic. According to their results South Korea and China have 100% network coverage in big city tube systems, followed closely by Japan with 87.5% and Asia as a whole with 84.4%. Europe is pretty much down in the list at 56% only trailed by a few such as the US where it is even worse. A result I would not have quite expected. I guess the message is clear: European and US cities beware, you are by far surpassed by your Asian competitors!