Today I found an interesting report on the Ofcom website from back in October 2010 on the potential impact the opening of the 900 MHz band would have for consumers and on competition in the UK. It's very detailed and I have just scratched the surface so far but already found some interesting figures and graphs in it. To reach a conclusion, Ofcom has looked into coverage differences between 2100 and 900 MHz, number of base stations used and much more. In other words, their technical analysis contains details that can answer more questions than what that report was aimed at if you take the time to read it carefully. Note that the text on the web page itself is just the exec summary, the details are contained in the PDF files linked at the bottom of the page.