Three haven't even....
...sorted out 3G or 4G properly in the coastal town I live in. Regularly go into town and lunch and walk into shops only to loose 4G signal and forced onto H. On my old S4 I'd be forced onto nothing and would lose all signal.
Although I have a good package with Three, their signal is piss poor. Annoys me because their is a mast just up the hill from the house, yet still get poor signal in some parts of the house, even when by a window.