A modern day invention that has solved one of man's problems

This is one of the many modern day invention that has solved one of man's many problems.A handphone.It has help many people or maybe most of the people in this world to communicate with each other from different places in their countries,even in different places from different countries.It has even help to save great disasters like in car accidents,we need a handphone to call the ambulance to safe the people who are injured

and those that are close to losing their lives but this invention has really help the world and has save many people's life.Other uses will be to communicate with each other to see if they are well when they are in another country or place.If we have doubts about something, we can communicate with another people from another place to ask them for answers without having to walk from one place to another.The last use which is one of the most important, is to notice or tell people about events that will be going to happen.One of the examples is if you are going to be late for a meeting or you have forgotten something and have gone back to take it,you can inform those that are waiting for you to not wait for you further or to start their work first to not let them waste their time waiting for you.Here are the main uses that have helped solve Man's many problems.