Answer:
Students Shouldn't have phones because first they can be a distraction in class, they can cause students to harm themselves, and they can hurt others.
When students have their phones in class they can easily get distracted with games, social media, and more. If they don't do there work because of this they will fall behind and there grades will drop.
It can also cause student to harm themselves, students like to be caught up with the newest things and that means social media. Student may see people that look better than them and get upset. To comfort themselves they will try to lose weight, try to self harm, and can go into depression.
The last reason students shouldn't have phone's is because they can post harmful images, or words on social media that may hurt other students or people. These can hurt other people a lot and the student posting it can get in a lot of trouble for that.
Well theses are the three reasons students shouldn't have a phone. Phones can be a distraction in class, cause students to harm themselves, and they can hurt others.