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The cell phone jammer can block the signal from the cell phone. When it is installed there is no signal in your cell phone. Yesterday I read a message that a middle school installed the cell phone jammer, because many students play games or surf the Internet using a cell phone. Many people agree with this point, while others disagree. https://www.perfectjammer.com/wireless-wifi-bluetooth-jammers.html When I read the news, I was surprised. The time has changed when I was in junior or senior middle school there was no cell phone. When we meet up with another friend in another school, we have to write a letter or call his dorm number. Sometimes we have to wait a long time if they don't arrive on time. But nowadays we only send a short message or call his cell phone number. The problem is simply solved. At that time, the internet was not widely used, so we paid a lot of attention to the class. After school, there wasn't much information we could search. So our knowledge only came from the textbook or the test work. Nowadays, students can search the information on the Internet. Or you can download the information you need. https://www.perfectjammer.com/all-gsm-3g-jammers-blockers.html While many students don't want to listen to class, they just want to play computer games or surf the Internet or chat with friends on the Internet using their cell phones. So the school was concerned about this problem. They decided to install cellphone block accessories to prevent this. I agree with this idea because middle school is one of the most important times in our lives. We learned a lot of knowledge and information at this point. This time can also be a turning point in our lives, if we study hard and we can enter a famous university, your life will change. Many famous people studied very hard when they were at that time. I still remember that in middle school I was very interested in learning geography and English. I spent a lot of time on these two issues. After graduating from high school, I learned English at a university. Then I hunt a job that has to do with English. Maybe my whole life is related to English. https://www.perfectjammer.com/all-cell-phone-jammers-blockers.html In my opinion, the school should install the product. if they can turn off the machine after school. The most important thing is that the product should not affect the lives of other neighbors.