Final answer:
To sign up for XFI Advantage, customers can visit the official website of Xfinity and create an account by following the prompts. They need to provide necessary information and agree to the terms and conditions.
Step-by-step explanation:
Customers can sign up for XFI Advantage by visiting the official website of the Xfinity company. On the website, they need to select the XFI Advantage option and follow the prompts to create an account. Once the account is created, they can proceed with the sign-up process by providing the required information and agreeing to the terms and conditions.
Learn more about XFI Advantage sign-up process