This video shows the Nokia concept phone named the 'morph'. This concept cell phone boasts nano technology that allows it to change shape, colour and design. It would allow it to be charged by the sun, would be able to analyze the surrounding environment (oxygen, C02 etc).
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The phone could be folded to be stored in the pocket or bag or utilized as a watch or stylish wrist band that could have it's own personalised wallpaper. The phone would even be able to clean itself - this is so cool! I can't wait until this sort of thing becomes a reality.