Comcast turns millions of Xfinity gateways into motion sensors via Wi-Fi sensing

Comcast has activated Wi-Fi Motion on millions of XB7-and-newer Xfinity gateways, using existing Wi-Fi signal disruptions to detect home movement at no added cost. The opt-in feature pushes alerts through the Xfinity app. Comcast states it is not professionally monitored or a home security service. Privacy terms permit disclosing motion data in legal proceedings.