A:AnswerGiven that the description of the modem itself recommends pairing it with a Netgear branded Router as well as a near identical question being asked and answered earlier about router compatibility, yea, it should work just fine.
A:AnswerI had similar issues. Just click on notify me when available button in case its OOS and you'll be able to order it once you get a notification email. That's what I did. It took just two days to get that notification
A:AnswerMAC addresses are sometimes repeated by vendors The hope is that no one has this issue. Here is more on that:
https://superuser.com/questions/968340/how-is-uniqueness-of-mac-addresses-enforced
To fix the issue, you have to enable mac spoofing. Maybe someone did this for your MAC address already since they write them on the outside of the box. Here is how to do it:
https://kb.netgear.com/1086/No-Internet-with-new-router-MAC-spoofing
You may have to call Xfinity to tell them the new MAC address.
A:AnswerThe model cm1200 is a modem. You would have to use a router for ethernet and wifi and these can be modified by you not the cable company. You'll also save the rental costs owning your own equipment.
