What is a "Block Gsm"? The Most Authoritative Explanation.

What is a GSM?

The Global System for Mobile Communications ( GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile devices such as mobile phones and tablets.

What does GSM lock&unlock Mean?

What does GSM, Lock & Unlock Mean. The term GSM means - Global System for Mobile Communications. It is the most popular standard for mobile phones in the world. GSM differs significantly from its predecessors in that both signaling and speech channels are Digital call quality, which means that it is considered a second generation (2G)...

What is Desktop 4 Bands GSM 3G 4G blocker device?

Desktop 4 Bands GSM 3G 4G Blocker Device This device can jamming multiple bands, all cell phone signals can be shielded. Only blocker the downlink signal frequency, does not affect the normal work of the surrounding communication. High reliability, long-term and stable continuous operation in a variety of environments.

What are the advantages of the only block GSM jammers?

Only blocker the downlink signal frequency, does not affect the normal work of the surrounding communication. High reliability, long-term and stable continuous operation in a variety of environments. This GSM jamming device has the remote interference distance and the interference signal is stable. It can block multiple signals at the same time.