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The effect of cell phone signal jammers (or mobile phone signal blockers) may be affected by many factors. The following is a detailed analysis of these factors:

1. Preliminary planning and data analysis

Missing the coverage plan of the blocker: If detailed data analysis and plane survey are not carried out in the early stage, blindly installing the blocker may result in poor shielding effect. Therefore, before installation, you should contact professional customer service for consultation and purchase a suitable blocker according to the characteristics of the place of use.

Inaccurate frequency band testing: There may be differences in mobile phone signal bands between different operators and different regions. If only a single operator's test card is used for testing, the test results may be inaccurate, which will affect the purchase and installation plan of the blocker. Therefore, multiple test cards such as China Mobile, China Unicom, China Telecom, and Radio and Television should be used for testing to ensure that the blocker can cover all the frequency bands that need to be shielded.

2. Installation position and height

Improper installation position: The installation position of the blocker has a great impact on its effect. If there are obstacles or partitions at the installation location, the signal may be blocked, thereby affecting the shielding effect. Therefore, when installing the jammer, you should choose an open, unobstructed location.

Installation height does not meet the requirements: The installation height of the jammer will also affect its effect. If the installation height is too high or too low, it may cause uneven signal coverage or fail to achieve the expected effect. Therefore, when installing the jammer, you should choose a suitable installation height according to the characteristics of the place of use and the performance requirements of the signal jammer.

3. Jammer performance and purchase

Insufficient jammer performance: There are some jammers with poor performance on the market, which may not be able to completely shield mobile phone signals or can only shield part of the frequency band. Therefore, when purchasing a jammer, you should choose products with stable performance and reliable quality.

Incomplete frequency band coverage: With the continuous development of mobile communication technology, the frequency bands of mobile phone signals are also constantly upgrading and changing. If the jammer cannot cover all the frequency bands that need to be shielded, it may result in poor shielding effect. Therefore, when purchasing a jammer, you should ensure that it can cover all the frequency bands that need to be shielded, including 2G, 3G, 4G, 5G and WiFi, etc.

4. Environmental interference and signal strength

Environmental interference: There may be other interference sources in the environment where the mobile phone signal jammer is used, such as other radio equipment, electromagnetic fields, etc. These interference sources may interfere with the normal operation of the jammer, thereby affecting the shielding effect. Therefore, when using the jammer, try to avoid coexistence with other interference sources.

Signal strength: The strength of the mobile phone signal will also affect the effect of the jammer. If the mobile phone signal strength is too strong, it may exceed the interference capacity of the jammer, resulting in poor shielding effect. Therefore, when using the jammer, its interference parameters should be adjusted according to the actual situation to achieve the best shielding effect.

In summary, the factors that affect the effect of mobile phone signal jammers mainly include preliminary planning and data analysis, installation location and height, jammer performance and selection, environmental interference and signal strength, etc. In order to improve the shielding effect, these factors should be comprehensively considered and corresponding measures should be taken to optimize and adjust.