Trouble activating device

Try calling 1-855-652-3446. That is their self-install 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 when you call.

@user_c4abe8 So sorry to hear about that modem issue but we'd love to help. Could you please direct message me your full name and address to get started?

Here's the detailed steps to direct message us:

• Click "Sign In" if necessary

• Click the "Direct Message” icon (upper right corner of this page)

• Click the "New message" (pencil and paper) icon

• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list

• Type your message in the text area near the bottom of the window

• Press Enter to send your message

@user_c4abe8 

Did you get a chance to try either of those methods of activation ? If so, please answer right here on these public help forums, thanks.