One of core principles of hacking in my personal philosophy is to identify and control communication networks. When you control the phones or data networks individual systems in a given country or corporation become meaningless as you can move between everything seamlessly. The ante has been upped with cell phones being an added bonus. Now with access to cell phone company internals for a given country you can not only see call records, text messages and mms messages, but actually track cell phone owners location and depending on the system – monitor phone calls live.
Take a look at this lengthy well researched article at CNET by Declan McCullagh
http://news.cnet.com/8301-13578_3-10451518-38.html
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