Unless you're an EE or Vodafone customer, you've either been shelling out for subterranean internet, or bid the London Underground's WiFi network a solemn farewell when free access ended in January. If you're with O2, however, you're free pass has now been reinstated, as the bubble-loving carrier has become the latest passenger riding on Virgin Media's tube hotspots. Better yet, all O2 clientele have been automatically registered, so jumping online should be pretty simple once your device has found the source. Also, the underground network will shortly be meeting it's 120-station target, as Virgin will be flipping switches at the final 12 locations throughout this week (the station list is available at the source link). So, should you start seeing more people in more places frantically hammering their smartphones during those 30-second pauses on the platform, you'll know why.