Proceed to xfinity.com/authorize from a different device (such as a cell phone, tablet or background computer - maybe not from the Roku). In the browser, input the six-digit code supplied in the Roku device. You will notice a Success!
How can I trigger my Xfinity accounts?
As soon as you've created a temporary online connection and if do not automatically find a welcome message to start installation, start an internet browser and visit xfinity.com/activate. Adhere to the onscreen prompts to confirm your Xfinity accounts and complete the activation procedure.