It is a scam for people who may want to make international calls, for connection charges, bills etc. It is not exactly free as they like to make it- the hidden charges will differ from person to person. That is why I cancelled after reading the small print. The telesales people are very pushy and convinced me that it was the best option for me. But the best option for me has turned out to be 1899 for weekdays and Onetel for weekends- my phone bills have gone down from £125-00 quarter to £32-00 per quarter ! This includes rental charges, and all calls including international ones which I make quite regularly. With Carphone TalkTalk, this would have been at least 150-00 per quarter, even more than what I was paying with BT.
So examine your telephone bills, where you make calls to and for how long and then sign up. My husband was caught up in their so called cheap mobile calls which turned out not be very cheap when all the connection charges etc were billed. Unfortunately he is now caught up in the contract and cannot go elsewhere. SO BEWARE !
Anyway, Carphone Warehouse have now settled on a £200-00 payment this afternoon after I told them I was going to Ofcom. There must be some guilt there somewhere !