A:AnswerYes this works with Xfinity. Upgraded to this modem and more than happy. I am getting 100mbps wifi and wired I am pushing 1gb which I have no idea how this is possible but I am. I am paying for 100mbps and happy to say I am getting it.
A:AnswerPlease check with Comcast for a list of approved modems. A list of modems is available on their website. This modem should work with Xfinity Triple Play however Comcast might not allow modems outside of it's list.
A:AnswerShort answer is No.
Reasons:
NETGEAR C6220 AC1200 CABLE MODEM ROUTER- No this will not work to replace the AT&T router. This modem is for customers who are using service from a Cable company. The Interface to your vendor (AT&T) does not use the Coax-Cable like Xfinity.
I am using this modem so I don't have to rent Comcast/Xfinity modem.
Hope this helps.