Police use obscure phone tech to track people

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You might know that your cellphone has a unique code that allows advertisers to target you for promotions. What you may not know: That same number could be helping police surveil you without a warrant. (Sept. 1)(AP video: Allen Breed, Haven Daley) Subscribe for more Breaking News: http://smarturl.it/AssociatedPress Website: https://apnews.com Twitter: https://twitter.com/AP Facebook: https://facebook.com/APNews Instagram: https://www.instagram.com/APNews/ ​ You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/99fc0ea9699f42a1a1f2bfa2e14e658c

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