Phone-for its purposes invented Antonio Meucci . (When his wife seriously ill, Meucci invented the phone to without leaving home can communicate with others, unfortunately, a small distance) In my opinion, mobile phone, is one of the most necessary things. you can use it to communicate with someone who lives very far from us and we can not visit her. Nowadays the phone has almost every, some of them are nawet built-in camera that can take pictures, record video or listen to music.