If students bring mobile phones to class, they can disturb both the teacher and their peers. Using mobile phones in class is harmful to their health.If students bring mobile phones to class, it can disturb both the teacher and their peers. Using mobile phones in class is harmful to their health.If students bring their mobile phones to class, they may disturb the teacher and their classmates. Moreover, using mobile phones excessively during class can be detrimental to their health.