Advantage
There is no doubt that since the mobile phone has come to this world and the world become smaller than before ,peoplecould use it to contact to others and even to the world,and two lovers could also to sending message to each other,the could to show their love by this way,and it maybe means the perment just like the worth necklace.
Disadvantage
Also,it is not diffcult for us to find something bad form the mobile phone.
Everyone knows it could have a thing which contains a iol of radioactivity,needless to say it is bad for our health,but it is not the most important,the most important disadvantage about it is if the students who have had it will use it to play phone games on class or even where the are,so we know it could forced them not to study hard,and at last their parents will very worried about it bu it is already too late.