I buy this so I could return my rental I be pay to Comcast for the $ 7\/month modem . when I plug the modem in , there be a connection but no internet access . I end up call Comcast and I read they my HFC MAC ID # and turn out that this modem be currently register under someone else and they could not register under my name . after hear that , I be frustrated and angry that I buy this and hope I can get my FULL refund back and will never buy from they again .