Though the steps vary by operating system, Android, iOS, and Windows Phone include settings that let you limit the amount of information that is being funneled to data brokers, as well as to the advertisers and app developers who sell your data to those brokers. These features range from denying location-based data to specific apps – including non-intuitive apps, which don't have a reasonable, Yelp-like reason to know where you are – to opting out of "interest-based ads," which are the beating, creepy heart of the data brokers' mass collection efforts. Check your phone's settings for privacy options.
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