Head over to Xfinity’s device webpage.
Enter your address and select your current Xfinity plan—or the one you’re planning to get.
Click “Find Devices.” If you get a pop-up, click “Continue to approved devices.”
Change any filters needed on the left side. For example, if you have an Xfinity Voice plan, be sure to click the “Voice/Telephone enabled” box. If you’d like a modem/router combo, click the “Built-in WiFi” box.
Xfinity lists the fastest (and most expensive) modems first, but any of the modems listed will work well with your internet plan. Under the modems that appear, click the “Show more devices” link. That will pull up all your options, making it easier to find an affordable Xfinity-compatible modem.