So last week I bought 4 DTv boxes from someone and this persons DTv service is still active. There on vacation now, have yet to call and cancel it, and wont be back for 2 weeks. For me to put my DTv cards in these boxes and get service to them will the previous owner have to call and cancel his service first? Or can I just call DTv, tell them the numbers on the boxes and cards and have them fire it up? Reason I ask here and not just call them and see if they can do it is because I don't want them to think I'm giving this other person my service. They always had the lowest package and I get all the movie channels and NFL package.