Helsinki subway system is not impressive in any way - about 25km of tracks in Y-shape. But at least 4G coverage under ground is pretty great. This in Espoo at the Urheilupuisto station.
Helsinki subway system is not impressive in any way - about 25km of tracks in Y-shape. But at least 4G coverage under ground is pretty great. This in Espoo at the Urheilupuisto station.