7
Before you call Comcast Xfinity, make sure that your account 
number, account phone number, email address, and password are 
nearby. The modem router’s model number is C7000. The serial 
number and MAC address are on the product label.
 ¾ To set up your Internet connection by calling Comcast 
Xfinity:
1.  Call Comcast Xfinity customer service at 1‑800‑XFINITY 
(1‑800‑934‑6489).
2.  When asked, provide your account information and provide the 
modem router’s model number and MAC address.
3.  Wait for the Comcast Xfinity representative to confirm that 
your modem router is active.
4.  If you do not get an Internet connection with the modem 
router, ask the Comcast Xfinity representative to look for your 
modem router online, and do one of  the following depending 
on what the Comcast Xfinity representative tells you about your 
modem router:
•  If the modem router is not visible, the Comcast Xfinity 
representative can give you instructions to verify why the 
modem router does not connect with your high‑speed 
Internet service.
•  If the modem router is visible to the Comcast Xfinity 
representative, reboot the modem router. Check your 
online status again.