Ultra Wideband security in iOS - Apple Support
https://support.apple.com/guide/security/ultra-wideband-security-sec1e6108efd/web
WebFeb 18, 2021 · Table of Contents. Ultra Wideband security in iOS. The new Apple‑designed U1 chip uses Ultra Wideband technology for spatial awareness—allowing iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max or later iPhone models to precisely locate other U1‑equipped Apple devices.
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