What are the privacy implications of the iPhone 11 Ultra Wideband?

The iPhone 11 models have a new chip called U1 to enable ultra-broadband (UWB). It allows precise location tracking. Apple says it allows these phones to have "spatial awareness" so that the iPhone 11 Pro can determine its location relative to other U1 chips. A use case points your iPhone to another iPhone, so AirDrop will prioritize that device when it comes to sharing files. But what happens when retail stores can track your chip?

Essentially, the new chip is the dream of box marketing. Stores track all of your purchases, leading to cases like the infamous 2012 case where Target unintentionally disclosed a teenage girl's pregnancy to her father. When a store has UWB compatible hotspots, it will be easy to monitor the location of a phone inside and track what you took into consideration buy in addition to what you actually buy.

: What are the privacy implications of the iPhone 11 Ultra Wideband?

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