is it possible to do? I want to add my parents as an additional line on my plan and port there number at the same time (I'm on verizon). I know that target has had deals in the past where they discount the iphone to $149 (4S 16gb) so I am considering doing it there, but I'm not sure if they can initiate the porting process there or I have to do it after the fact. Is it even possible to do it after you've activate the new line?