It’s a waste of time to call Comcast. You probably won’t get any discounts for your loyalty. These days, even threatening to cancel while on the line with one of their “retention specialists” may not get you a deal, and if it does, it’s unlikely to be a good one. Besides, phone calls to Comcast often take forever, and you have better things to do with your time.
If you want a good deal, you need a new customer special. One of these:
Just go to xfinity.com, sign up as a new customer using your roommate’s/spouse’s name (or maybe your dog or alias idk), skip past all of the other stuff they want you to sign up for, and that’s all. Comcast will automatically put in a cancellation for the existing account at your address and email them to that effect. You then just download the Xfinity app on your phone, go through the activation process (put in the MAC number on your router), and you’ll have internet access in about 5 minutes.
Do this once a year or whenever your “New Customer” pricing runs out. Simple, and no phone call involved.
You can go back-and-forth between your name and whoever you live with multiple times (see this Reddit post).
Enjoy the savings — goodness knows we need them this day and age.