I currently have a Series 3 with lifetime and it is still working fine. I am interested in possibly upgrading to an XL 4 premiere. I believe I have two Multi stream cards in my series 3. If I do purchase the premiere will Comcast allow me to call and activate it in the new unit or will I have to schedule a truck roll? I live in the north suburbs of Chicago if that helps. What are your thoughts about upgrading? I look to these forums all the time for your knowledge and help.