Overview
- Comcast, which announced the feature on August 18, is rolling out WiFi Motion inside its Xfinity Shield suite as an opt‑in capability for compatible gateways such as the XB7 and newer models.
- The system detects movement by measuring changes in radio/Wi‑Fi signals between the gateway and selected stationary devices, then sends alerts to the Xfinity app without recording images or video.
- WiFi Motion is included at no extra cost for qualifying customers while a paid Shield Select tier adds camera support, a night‑watch mode, and other premium features for a monthly fee.
- Comcast and reviewers caution the feature is not a professional alarm system because detection varies with router placement, home layout, building materials, number and position of monitored devices, and signal coverage.
- Experts and outlets warn of privacy and legal risks since Comcast’s terms allow data disclosure in certain legal situations and the underlying research shows the technique can evolve toward more detailed biometric uses.