Error Message When Trying to Change Xfinity Internet Plans

Hi user_ptfj2e, I appreciate you trying to use our website and the self-service options to find a new speed tier. I like to use those kinds of options with all of my accounts when I can to. I can help you with finding a tier that meets your needs. First I'd like to check a few things on that error message you're seeing though. If you're subscribed to other services, and are in a grandfathered package, sometimes you'll need to work with a representative to find a new package/promotion. A few other things to check are clearing your cache/cookies, and make sure you're signed in as the primary user role. Did you know what speed tier you were looking to change to?