A:Answer Yes, but it is NOT a modem too (you MUST buy a compatible Xfinity/Comcast modem too). I just set this device up for my Xfinity/ Comcast service, and it works great! However, in order to do so, I had to connect this WiFi router to a Comcast/Xfinity compatible modem. I bought the Motorola 8x4 Cable modem along with a GTOTd Coaxial Cable, which I connect directly into my apartment’s wall. Once this is connected, I plugged the NightHawk into it via an Ethernet cable and had internet access in about ten minutes. Everything worked like a charm, and the NightHawk app is great for controlling/ setting up your NightHawk!