Using the phone during class is one of the most painful problems for both teachers and the school. So, are we allowed to use cell phones during class? Using the phone during class has two sides. The good and the bad. If we use cell phones during class for academic purposes, this is absolutely the right thing and should be promoted.On the contrary, if you use the phone during class for entertainment purposes and do not pay attention to the teachers' lectures, this is a completely condemnation. Therefore , We can't say whether using a cell phone during class is either purely good or completely bad. Because this depends on the perspective of each person. However, in my opinion, students should refrain from carrying their cell phone and using it during hours. That is not good at all. 

Hi my name's hieu.Today i will talk about why student can use smartphone during the lesson.Firstly,using smartphone will make more convenient for student to copy the lesson in to the book without writing.Secondly,it can make student Interactive with teacher more easier.BUT, it not for student to play game during the lesson,lots of school let them play whenever they want this is a serious problem need to inprove imediately.That is all i can say.