Yeah, just ask some EE customers!
The UK networks just don't get it, banging on about 4G when there are still places with no, or barely useable 3G. Orange/TMobile/EE are a joke, customer service is a minefield as is their network coverage, more holes than swiss cheese. Customers in urban areas needing signal boxes post "optimisation" so they can use their phones at home!
Three are great in most areas IF you are outside, customer service sucks though.
Vodafone/O2 good 2G coverage, woeful 3G/4G.