Comcast just turned millions of Xfinity routers into motion sensors

“Comcast has launched Xfinity Shield, a new home‑protection platform that adds a WiFi Motion feature to eligible Xfinity Gateway routers. The opt‑in service monitors subtle changes in radio‑frequency signals between the router and connected devices to detect movement, sending instant alerts through the Xfinity app without using cameras or traditional motion detectors. The basic WiFi Shield tier is free for Xfinity Internet customers, while Shield Select adds AI‑enhanced monitoring, emergency‑service integration, and hardware upgrades for $15 per month. The feature is supported on several Technicolor and Xfinity models (XB7‑XB10, MXB1, XER10) and includes a privacy clause allowing Comcast to share motion data with law‑enforcement or in response to legal orders, though it does not sell the data to advertisers. Expert Analysis: By repurposing existing broadband hardware as a low‑cost motion sensor, Comcast can deepen its foothold in the U.S. home‑security market while generating incremental subscription revenue. However, the privacy disclosure may raise concerns among privacy‑conscious consumers, potentially prompting regulators to scrutinize data‑sharing practices in the broadband sector.”