New Poster
•
1 Message
Modem Upgraded/Changed ---now no internet
I upgraded my modem. How to I get the new modem to work when I plug it in place of the old modem.
New Poster
•
1 Message
I upgraded my modem. How to I get the new modem to work when I plug it in place of the old modem.
falconeye
Frequent Visitor
•
8 Messages
5 years ago
I would call comcast and let them know your new modem and that you need it activated or registered with your comcast service. Don't quote me on this but I THINK you can do it manually yourself at xfinity.com/activate. I always just call support though. If you did all that already, make sure the modem is on the list of compatible modems for xfinity services.
0
0
EG
Expert
•
110.1K Messages
5 years ago
If not, try calling 1-855-652-3446. That is their device activation line.
If that doesn't work for you, you can call 1-800-comcast and tell a rep that you would like to have a new modem provisioned for service. Have the RF / CM / HFC MAC address and the serial number of it handy.
0
0