If you are stuck with Xfinity Router not online issue, you are supposed to follow a few important instructions.
First of all, you are supposed to unplug your equipment,
And then you must wait for some time.
Now you should know that this method is known as power cycling or rebooting, which could simply fix the connection issues.
Next, you are supposed to make sure that your account is updated on payments.
You should go to the Billing tab in my account, and then you will be asked to sign in.
By following the above-stated steps and you would be able to find ways to fix it.
Read more: reset comcast router