After we cover installation, we’ll also give you some tips for troubleshooting your connection. We can hear the countdown to takeoff steadily running in the background, seven, six, five … So without further delay, here’s how to self-install Xfinity internet. Here’s a list of what you should have in your Xfinity Internet Self-Install Kit:1 After you’ve checked that everything’s in place, it’s time to activate your Xfinity internet service. If you’re missing anything from the list above, you can call Xfinity or arrange to return your kit for a different one. If there isn’t a pop up, select Overview on the top left-hand side of the app and choose Account. Then go to look under the devices tab and choose Activate xFi Gateway or Modem. Once you’ve completed this, the internet portion of the set-up is complete. Next, you’ll need to set up an internet connection so you can activate your modem. Look for the name of the network and a password (somewhere on the modem itself). Then, go to any of your devices and use this password to connect and activate Xfinity Wi-Fi. Once you’ve connected, you can activate your modem online If you’ve done all of the above and still can’t figure out how to activate your devices, there’s a list of videos on the Xfinity website that might help you. These videos can help clarify the process depending on whether you have Xfinity xFi Gateway or want to use your own router.