"Does anyone know if there is a mobile phone that works on solar power?"?
Answers:
No. There are no mobile phones that run on solar power directly.
However, there are solar powered mobile chargers available which use solar power to charge the battery of your mobile phone. There are various sites with more information on this.
I have listed here one such site
http://www.solarenergyalliance.com/mobil.
Unfortunately I don't think they've invented that yet. It's a good idea though!
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