I think you need to go into CarPhone Warehouse with your wits about you. I was whisked through a potential new contract and, on several ocassions, had to put the brakes on to check EXACTLY what I was agreeing to, and what would be part of the contract. The staff serving me gave an air of confidence, often distracted, which I quickly distrusted. I terminated an existing Vodafone contract to take on a new one. In oder to keep my old number it needed to be ported across via another provider - in this case 02. Mistakes made by CPW staff resulted in a delay in the porting process, which added a degree of stress and inconvenience requiring an additional in-store visit. That all said, however, I did get a very good deal.