Open your web browser on your device to sign up for the Comcast webmail service.
Paste this link into its URL address bar https://www.xfinity.com/
Locate the comcast net Sign in option in the top-right hand corner of the screen on the Comcast website page and click on it.
As you do so, you will be taken to the 'Comcast.net login' page, where you will simply click on the 'Don't have a username, create one' option.
Now, on the new webpage that appears, enter any of the following requested information and then click the 'Continue' button—
Social Security Number
Following that, you must provide the 'Zip Code and Address' details, and keep in mind that they must be associated with your account. Once you've finished entering the aforementioned information, proceed to create a user ID and a secure password for the same, and then agree to the on-screen 'Sign-in instructions' to complete the sign-up process for your Comcast email account.