I bought the phone from an authorized dealer and was not forced to sign anything at all. On the receipt given to me, stone is nothing that suggests that I should take the phone back. If I do cancel, do you know whether I will need to take back the 650?

I do not know whether I will cancel, but I have very little service in places I need it. I do like the Edge, but it isn't as impressive as I thought it would be...I did get lucky, Cingular let me get the expired Media Works plan.