I can almost assure you NYC subway does this. | Hacker News

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		77pt77 72 days ago \| parent \| context \| favorite \| on: Detection of hidden cellular GPS vehicle trackers I can almost assure you NYC subway does this.

reactordev 72 days ago [–]

Retail stores do too just fyi tracking you through the store. But it’s not pairing and it doesn’t have long range.

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