According to incomplete statistics, most American citizens are understandable about the phenomenon of signal interference. Because they think somewhere needs to be quiet. Not every place is where you answer the phone
Cell phone jammer are needed in many places. Like libraries, movie theaters, restaurants. Many people think it is better to keep quiet in some places, such as chapel.Instead of hearing someone's cell phone ring while you're praying, or being interrupted by a ringing phone while you're watching a movie, you can focus on your work in the library