I've just got an EE "4G" phone. It's a step up from 3G. More like WiFi than mobile. I've only had it couple days though, so can't really comment on coverage. Where it works, it's great -- the South Bank and in Peckham, for example.
But you need a new phone for 4G and it needs to be on the right band. There are new bands coming this year and new phones all the time, so you know... it's a lot more money than just swapping in a new SIM
On balance I'd say they're all about the same... sometimes good, sometimes crappy.
Depends quite a bit on which areas you live, work, or visit often.
Try this: http://opensignal.com/
Or this: http://www.rootmetrics.com/uk/check-coverage/
I've just got an EE "4G" phone. It's a step up from 3G. More like WiFi than mobile. I've only had it couple days though, so can't really comment on coverage. Where it works, it's great -- the South Bank and in Peckham, for example.
But you need a new phone for 4G and it needs to be on the right band. There are new bands coming this year and new phones all the time, so you know... it's a lot more money than just swapping in a new SIM