Coverage is crap. Daughter is on 3 and can barely get a signal in centre of york
Odd. I have a 3 mobile broadband dongle, and get pretty good signal in central York. I am two floors up, if that helps.
I use it a fair bit on the transpennine train, and get a signal most of the way - the bits where I don't are as you'd expect, tunnels and cuttings and the wild blue yonder. Listening to mobile phone conversations around me suggests I'm doing as well as anyone. I did struggle a bit at my sister's in Winchester, and all the way there and back on the train.
I do have a gripe with their mobile broadband topping up online, where I tried to edit my default card details when my Mastercard was renewed, and the form insisted on an issue number, (which it said was for HSBC Maestro only). I eventually entered 00 and it let me gon on, and then when I tried to top up a few weeks later, refused because I'd entered an issue number. I emailed them, (they promise a reply in 10 days), and have had no response three weeks later. I haven't tried ringing....