The number of mobile phones is increasing rapidly. Using mobile phones is a problem. Devices that interfere with the radio waves of commercially available mobile phones are installed in many places. The ringing of cellphones in the cinema made me feel uncomfortable. Interfering devices that suppress harmful signals can emit interfering radio waves in the same frequency band used by mobile phones and PHS. It will worsen the radio wave situation. Smart phones are very useful because they can…

In the information age, mobile phones and other electronic devices have become an indispensable part of people's daily lives. Their application fields are very wide. While bringing convenience to people's lives, they also bring many problems. Many people are suffering from this inconvenience. This is a clip that didn't notice the unpleasant noise from the phone! We promise a quiet environment. Of course, you will not be able to access the Internet, so you will be able to focus on what you…

In the information age, mobile phones and other electronic devices have become an indispensable part of people's daily lives. Their application fields are very wide. While bringing convenience to people's lives, they also bring many problems. Many people are suffering from this inconvenience. This is a clip that didn't notice the unpleasant noise from the phone! We promise a quiet environment. Of course, you will not be able to access the Internet, so you will be able to focus on what you…