Learn more about activating your Xfinity Gateway or an approved customer-owned third-party modem using the Xfinity app. Xfinity For full functionality of this site it is necessary to enable JavaScript.. Get online support for Xfinity products & services. Find help & support articles, chat online, or schedule a call with an agent.
Activate an Xfinity Gateway or third-party modem with the Xfinity app Learn more about activating your Xfinity Gateway or an approved customer-owned third-party modem using the Xfinity app.&.. Activate your device on Xfinity by following the instructions provided.