Security company Multicom of Stockholm, Sweden, has found a way to use cellphones to help track valuable goods.
Guards who accompany valuable cargo will carry a phone with a built-in GPS chip. The phone automatically makes a call to a control centre every 60 seconds giving the time and its current position (WO 2004/28184).
This information is stored, and should the cellphone fail to make two or more calls, or if its signal is jammed, the centre can help police by producing a trail showing the cargo's recent movements. The trail should help police narrow their search.
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