Comcast doesn't have an agreement with HGTV networks (Food, Travel and others are part of HGTV networks) for 'non-portable' devices like Smart TV's and Roku. There used to be a workaround where you plugged in a web address, but modifed one part with the on-screen code, and it would activiate. That no longer works with the latest updates. If you try, you get a messge on the device that your carrier is not supported. I had to remove Travel Channel from my Roku.