Although the functions and applications of mobile signal jammers and signal blockers are similar. But there are some differences in implementation methods and characteristics. The following are the main differences between the two:

Working principle:

Mobile Signal Jammer (also known as Mobile Signal Blocker or Screen Blocker):

It uses wireless waves in the same frequency band as mobile communication for transmission. When working, it will scan from the low-end frequency of the forward channel to the high-end at a certain speed. This scanning speed forms garbled interference in the message signal received by the mobile phone, making it unable to detect normal data sent from the base station and thus unable to establish an effective connection with the base station. Manifested as no signal on the phone, no service system, and network search failures.

Signal shield:

It mainly utilizes the propagation characteristics of electromagnetic waves and weakens the energy of electromagnetic waves through a hexahedral cabinet made of metal materials, making it impossible for the mobile phone placed inside to establish contact with the base station.

Application scenario:

Mobile signal jammer (blocker):

Widely used in various examination venues, schools, gas stations, churches, courts, libraries, conference centers (rooms), cinemas, hospitals, governments, finance, prisons, public security, military and other places where the use of mobile phones is prohibited. In addition, due to its adjustable shielding radius and range, it is also widely used in professional classified places, flammable and explosive places, and professional operating places.

Signal blocker (mainly referring to mobile phone blocking cabinet):

Mainly used in highly confidential situations, such as military bases, government agencies, or confidential meetings. Due to its direct blocking of electromagnetic wave propagation from the mobile phone signal source, it plays a precise protective role in these situations.

Performance characteristics:

Mobile signal jammer (blocker):

High effective power, large interference radius, and adjustable range. Adopting advanced filtering technology, effectively segmenting, only interfering with the downlink, without causing interference to the base station. The design of the slow start circuit can avoid the ignition phenomenon caused by mechanical switches, with high integration and stable operation. The four frequency bands are designed independently, without affecting each other, and the performance is stable and reliable.

Signal Blocker (Mobile Phone Blocking Cabinet):

Storing the phone in the cabinet can achieve blocking. Not only will it not affect the public’s demand for internet use, but it also plays a precise role in protecting confidential places. But due to its large volume, it requires a certain amount of storage space.

Environmental impact:

Mobile signal jammer (blocker):

The interference signals emitted have a wide coverage range, but their distribution is uneven and there are shielding vulnerabilities. This may affect the normal use of mobile phones by surrounding residents.

Signal Blocker (Mobile Phone Blocking Cabinet):

Due to the direct disconnection of mobile phone signals at the source, it will not affect the public’s internet demand.

In summary, there are significant differences between mobile signal jammers and signal blockers in terms of principles, application scenarios, performance characteristics, and environmental impacts. The choice of device to use depends on specific scenarios and needs.