Using the mobile phone has gogd sides , and also bad sides.I think that it is used for our entertainment and to be in the kontakt with everybody.There are many rules of using the mobile phone. For example we must switch off our mobile phones in the theatre , in the meetings , in the cinema and etcetrally.Mobile phone is not only useful , also it has harms for us.We must know the rules of using it. Because now it is very important for us