From the MIT Tech Review - April 2012
If You Have a Smart Phone, Anyone Can Now Track Your Every Move
(Snip)
The rollout of this technology means there are now at least three ways that users can track their locations indoors, where GPS is generally useless bluetooth beacon, Spotrank (and proprietary vendor) databases of Wi-Fi hotspots, and Navizons I.T.S. nodes. It also marks the second way (that I know of) for you to be tracked via the location of your phone, whether you want to be or not. (The first requires access to your cell phone carrier, and is used for example to locate your position when you make a 911 call.)
It shouldnt be surprising that carrying around a little RF transmitter in your pocket makes you visible to all sorts of tracking technology. Maybe its simply the (inevitable) commercialization of this fact that is somehow unnerving.
More@link
http://www.technologyreview.com/vie...t-phone-anyone-can-now-track-your-every-move/
MAC Address (every device now has one).....
ETA:
(Snip)
Every device that connects to an IEEE 802 network (such as Ethernet and WiFi) has a MAC-48 address.
Common consumer devices to use MAC-48 include every PC, iPhone, iPad, and Android-based devices.
MAC address - Wikipedia, the free encyclopedia
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