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The mobile phone was originally invented to talk to someone when we needed it. But over time, the situation has changed. Now the mobile phone is not just a mobile phone, but a computer, portable entertainment equipment, Internet terminal, wallet, GPS navigator, theater center, etc. You can now see that everyone carries their mobile phone with them, no matter where they go, sit down, walk, eat, shop, meet, everywhere, every moment. So have you noticed the problem now? When we pray in church, if someone speaks loudly on the phone, will it be a problem? Is it a problem to watch a movie in a movie theater? Or, what if someone yelled at his cell phone in the library? Yes, we can now agree that misuse of mobile phones can cause serious problems. We need to find a way to prevent the use of mobile phones in certain places. For this, we need Cell Phone Signal Jammer Classroom .