mobile phone positioning

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There is a site http://gps.66ve.com declaring that it can locate mobile phone around the world. But When I open that site and try to locate a number, it ask me to register and login. Then I registered and loged in. But it still does not do his work. It asked that I should accumulate enough score by inviting some other people. I hate doing such cheating things. Does every know this site? whether it is a useful site or simply a scam to get people register there? Are there really any sites can locate moble phone?