it work . and that say a lot for a cable modem . I just move into a area with Comcast and opt for the 25 down , 5 up high speed internet . it work flawlessly with it . please remember , as other have note , that when set up the service with you provider , provide they with the s\/n on the bottom of the box , not on the modem . I have no problem set it up , and the speed I be pay for , I be actually get !