buy this item to replace my old modem . I have comcast cable connection and this modem -lrb- docsis 3.0 -lrb- boost my speed from 6 mbp to 25 mbp ! I be very happy with it . nice packing and it be a easy set up . just plug the modem in to the cable . call comcast and tell they you have new modem hook up and they will take care in few minute you will be online .