“You can browse the internet quickly and easily on most new phones. Phones know where they are, thanks to in-built GPS satellite technology or triangulation from mobile phone masts. They can then tell if other phones are in the same area. Bluetooth short-range radio technology is also standard on most mobiles and with this phones can pick up the presence of other Bluetooth-enabled phones within about 20 metres.

Effectively, by linking these two developments, your phone can tell if someone is near you and can access lots of information about them – the perfect ingredients for real social interaction. “

http://technology.timesonline.co.uk/tol/news/tech_and_web/article3897340.ece