It's undeniable that smart phones are playing a vital role in every sudent's life. Therefore, I think that smart phones shouldn't be banned among them. First, smart phones are useful devices that help students a lot in their studying. They can search for math solution, history stories,... to understand lessons better and get higher scores. Second, formers teacher could use phones to contact with his/her student conveniently, for example to inform an notice which is emergent. Morever, there are so many applications which support students' studying, teachers no longer have to spend time explaining complicated problems to their students. Thankfully with the help of smart phones, students can understand on their own. In conclusion, I strongly support the idea that smart phones shouldn't be banned among student as aforementioned reasons.

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However in reality this is extremely difficult work. Instead of banning the school, teachers should find ways to teach children how to use cell phones correctly and most appropriately. Absolutely not used for the purpose of mocking and insulting each other with hot clips, depraved violent images…. Students themselves also need to be aware that learning is important to them, using phones for the purpose of learning is key. For parents, it is necessary to prescribe the number of ages for their children to use the phone, to control the time and behavior of their children when using the phone to promptly prevent the actions going too far.
A cell phone is an extremely useful means of communication. Not only saves traveling time, but it also has the ability to connect people with people. But how to make it not wrong and affect the younger generation is extremely difficult. So it needs schools and parents to take tough measures to prevent early use of phones in students. Because that way can help them fulfill their role and natural development.