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It is clear that some big malls are tracking all the wifi-enabled mobile phones before they are connected to the network... How can this be done?

I have a similar issue... how to get the MAC address of a mobile phone when it comes near my network but is not connected to it.

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Most WiFi enabled devices broadcast their Mac address when probing for networks to join in the vicinity.

By placing your own WiFi device in promiscuous/listening mode and utilizing a tool like Aircrack-ng, you can see and record all broadcast traffic enabling you to see if a device with a specific MAC address comes within earshot of your listening device.

See: Is your smartphone broadcasting your movements when you shop?

  • with this am able to see what are the wifi signals available in that range...but how can i know the mobile phones available in my wifi range – spartan Mar 26 '14 at 8:15
  • @spartan: See security.stackexchange.com/a/54068/884 – Piskvor Mar 26 '14 at 10:41

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