You could be right but such information would be one of the factors that would help consumers choose a particular service provider when they factor in quality of service that they are likely to receive before buying a USB modem. I stumbled upon the UK Ofcom sitefinder website, which is the equivalent of our own CCK . Their site has a
Mobile Phone Base Station Database linked to Google maps
http://www.sitefinder.ofcom.org.uk/
Thanks
vince