Where are cell phone jammers appropriate?

In many situations in our lives, such as examination, meetings, etc., using a mobile phone is very inappropriate, this time in addition to early mobile phones confiscated, can use cell phone jammer, will be within the scope of the particular occasion, wi-fi signal shielding the signal, not the mobile phone signals, access to the Internet, we wouldn't go to play mobile phone, it's very good reach the expected effect.

The creation of mobile phones has indeed brought closer the distance between people and brought great convenience to people's lives. However, with the spread of mobile phones, people have reached the situation where they never leave their phones without their bodies, which has brought great harm to many occasions. As a result, cell phone jammers have followed.