I've been with ID mobile for a few months now. I live in the central belt of Scotland near Edinburgh and my coverage is almonst non-existent. On the campus where I work there is zero reception apart from small pockets here and there.
The coverage says I should have excellent indoor and outdoor 4G coverage. It says the same for my home address and I have the same problems. The only reliable method of communication is when I'm on a wifi network.
Absolutely disgusted with this abysmal service. Unfortunately I have to put up with it for two years but will not renew after that.