- Activate your Comcast Xfinity device Online

If you are a new Comcast xfinity customer you will want to activate your device as soon as possible so that you can start using your Comcast xfinity services and products. allows Xfinity users to activate and authenticate their internet, cable television and/or phone services. We have provided a quick “how to” activation guide below for you to activate your Comcast xfinity device online.

How to activate Comcast xfinity device

Prior to activating your Xfinity services through Comcast you will need to unpack your equipment and set it up as shown in the enclosed directions which come with your Xfinity devices. Once the initial set up has been completed users can then log in to activate their account and services and take full advantage of all of the features of their account. Before using services your account must be authenticated and fully activated – this is also true if a user is moving to a new address.

What to do to activate your Comcast xfinity device Online:
  1. Visit:
  2. Click on the yellow “Continue” button.
  3. Enter your account number and phone number.
  4. Continue to provide all the required information and move forward until you receive your activation confirmation. This may take 20 minutes or so to complete.
Xfinity is a brand of Comcast Cable Communications, LLC, a subsidiary of the Comcast Corporation, used to market consumer cable television, internet, telephone, and wireless services provided by the company. The brand was first introduced in 2010; prior to that, these services were marketed primarily under the Comcast name.