I order the use Netgear cable modem so I do not have to keep pay the monthly Comcast lease charge . the modem arrive just five day after I order it via priority mail from California to my home in Massachusetts , which make I happy . but as soon as I receive the box I notice the contents be rattle around inside . to my surprise and alarm , there be no packing material in the box when I open it . you would think the seller would pack the modem carefully to prevent any damage in transit , especially since it be a use modem . I intend to install the modem later today and I be hope it work properly . to be continue ... well , despite the modem be on Comcast 's approve modem list , the tech could not get it to register with they system . I be go to try again tomorrow and ask for a higher tier technician .