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She described how she had been spotting people across London using Lumia phones, from a woman in a restaurant who was showing a recently-acquired Lumia 800 to her fellow diners, to a female friend who, after playing with the same device at a bar, found herself approached by two different men all wanting to know more about her phone.

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As a device Natal is a thin bar about 12 inches across, with sensors that measure a room's depth, the available light and the size and motion of up to two gamers standing in front of the machine and multiple players taking turns.

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