Fao Graham.
It's not quite that perfect giving a phone shop the post code and them getting the info correct.
I'm online now with a t-mobile dongle on payg in an area of Herefordshire that according to T-mobile has no signal capability, but some how or other, we get a very good reception.
At least on payg you can use a couple of networks to get coverage. That way you only pay if you can play. A bit naughty I know, but you'd be suprised how many households don't security protect their broad band systems. Over Jan & feb we were at a site with free wifi. But what we also found was that in range was 3 unsecured home broadband signals that we could of easily used.
So a timely warning to those at home. secure your broadband as if a criminal logs onto your system they might well get more than a free surf on tinternet. We do not surf piggyback ourselves.
Steve l.