How stores use your phone's WiFi to track your shopping habits - Washington Post (blog)

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How stores use your phone's WiFi to track your shopping habits
Washington Post (blog)
Every smartphone these days comes equipped with a WiFi card. When the card is on and looking for networks to join, it's detectable by local routers. In your home, the router connects to your device, and then voila â?? you have the Internet on your phone.





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