Apparently it's called a PAC Code, fail!
Cool
some of my family are on Vodafone, signal is OK.
But O2s offers don't seem anywhere near as good as 3s.
Thanks for the head's up.

You're right, I just tried. They shouldn't be allowed to do that, IMO. If you're wanting to leave today, you should be able to
anyways, I'll probably go into an O2 store this week and cancel from there. Tinkers.
I am thinking to go on 3 now, their offers seem too good to be true.
I've had great luck with O2 sticking to the cost of my bill though.
Is it still common for other contracts to be charged much more than you should have been charged? That's what I seemed to have before I moved to O2. Orange even lied to me twice saying they'd never received my call when I'd cancelled with them for two consecutive months. T Mobile were similar.