A:AnswerI took mine cable modem box to a nearby xfinity store where they set it up in their system like linking Mac ID's or something. It's not plug n play.
A:AnswerUse the NETGEAR C6300 AC1750 16X4 CABLE GATEWAY. You will need to call Xfinity and register it, once that is complete works good if not better than the xfinity standard one they supply. I have had no issues with mine.