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Apple announces the framework 'Nearby Interaction' that uses the 'U1 chip' of iPhone 11 that can grasp the coordinates with a few centimeters error - GIGAZINE
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How to turn off Ultra Wideband U1 chip to prevent background location tracking on iPhone 11 and 11 Pro - 9to5Mac
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Uncapped: The Apple U1 Ultra-Wideband Chip in the AirTag #Dieshot #ReverseEngineering @Apple « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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