GSM is the abbreviation of Global System for Mobile Communications. It is a digital mobile communication standard developed by the European Telecommunications Standards Organization ETSI. The biggest difference between GSM and its previous standards is that its signaling and voice channels are digital, so GSM is Think of it as a second generation (2G) mobile phone system. With the development of communication technology, GSM is gradually replaced by 3g and 4g, coupled with the rapid introduction of 5G networks, the traditional GSM use is less and less.
The GSM signal scrambler is a device that blocks the GSM signal band. If you are suffering from ringing or noise from surrounding phones , consider using a GSM jammer product. The general gsm signal scramble device is cheap and easy to carry, and can select all interference frequency bands according to your own needs, such as 3G 4G DCS PHS.