I would think that one of the "several factors involved" may dwarf regulation: area.<p>The UK operators have 94,000 square miles to cover while US operators have a little over 3.1 million, just in the lower 48. Obviously no single carrier is ever going to cover 100% of either country (and in the US in in particular they don't come even close), but the simple size of the problem in the US drives their infrastructure costs way up.<p>If AT&T only had to cover the state of Michigan (96,000 square miles) they could probably do it for less than $60 a month...<p>I agree that we don't have nearly enough competition in the US, but let's not pretend that a few more "harmless" laws will make everything rosy and perfect.