my service provider -lrb- Comcast -rrb- advise modem replacement . my original Motorola surfboard never give I a problem . since I own my modem , I buy this new surfboard modem as it be replacement . order and receive be easy and fast . when I get it , I connect it and call Comcast with my EIN number and Model number . Comcast could not initialize my modem , however , and send I to visit my local office . it turn out that Comcast need to know that I own my modem , rather than lease one of they 's . when advise in my next call , I be up quickly , and surprisingly , the Comcast rep be capable and friendly .