Advantage of have a handphone

Today ,hardly everyone has a handphone,old people ,young people and children.Especially,young people ,their handphone are a lot of specieses.I think ,handphone already have been a necessities to people. A lot of advantages of have a handphone . For example ,handphone is very convenience .
First convenience, mostly handphones have camera .So , when you will visit a place , but you forget camera , at that moment ,you can use your handphone .Second convenience, someday you lose your way that is to your friend's home ,you can call your friend.
Of course ,there are a lot of advantages of have a handphone . So , I think having a handphone is very important to us .