Several days ago a high school set up a mobile phone jammer near the students’ dormitory building to block mobile phone signals without telling them. Since then many students have been unable to fall asleep. More and more students of the high school protest against it. However, the school responded that the radiation quantity of this mobile phone jammer is equal to a cell phone and cause no harm to students. Nobody agrees to this point.

         Some students said:”It is impossible that the radiation quantity of this mobile phone jammer is equal to a cell phone. If so, it will not be able to interrupt the signal of cell phone.” Other students said:”It is not a good way to prevent students from playing cell phones before bed. Teachers should contact with parents to teach students how to use cell phone appropriately.” Some parents doubted whether it was legal to set up mobile phone signal jammer secretly. Facing with these critics, the high school decided to report the jammer to relevant government department.