With the rapid development of science and technology, the mobile phone has got more and more functions. It can be not only to communicate and access to the web, but also to play mp3,watch television, play electronic games and take pictures Besides, it can perform. the calendar. the alarm clock and the calculator. There have been lots of changes in the designing. For instance, the colored screens have replaced the black and white ones. And even the smart phone hasbeen put into use now.