Some people (especially teens) get so much addicted to cell phones for talking, video, messaging, games, etc that they forget the real purpose of the phone and waste large part of their time in unnecessary interaction over their cell phones.
Nothing more can be a distraction for a teached in the classroom, when a student’s phone rings. Cell phones are increasingly becoming a problem for the schools during classroom hours and are becoming a means of cheating during examinations and other kinds of ability tests. All this is really bad and does hurt the future of the student, who doesn’t realize that he/she is him/her-self responsible for it.