Muppets
It is more than just stupidity, I was blatently lied to by a sales advisor for dialaphone (a phones4u company).
He told me that I would have no problem porting my orange number after recieving a new vodafone handset on a 18 month contract. When i phoned voda to perform this they told me that they don't deal in temporary numbers and i'd be stuck with the one they gave me.
To Voda's credit they sorted me out in the end but no thanks to dialaphone