In Japan, 90% of mobile phones are waterproof because youngsters use them even in the shower.
have developed a way of
charging mobile phones
The first mobile phone call was made in 1973 by Martin Cooper, a former Motorola inventor.
Over 250 million Nokia 1100 devices were sold, making it the bestselling electrical gadget in history.
Apple's iPhone consumes US$0.25 worth of electricity per year if it's fully charged once a day.