Why does the mobile phone still have a signal after the all frequency jammer is turned on?

With the advancement of technology, mobile phones are playing an increasingly important role in people's lives. However, in some important examination occasions, in order to maintain a fair examination environment, the state requires full-band signal jammers to prevent candidates from using mobile phones to cheat. However, when using the all frequency jammer, some mobile phones can still receive the signal, why? This article will answer this in detail.

First of all, if the mobile phone can still make calls and the call quality is good after turning on the full-band signal jammer, it is likely that the effective shielding effect has not been achieved within the shielding range of the jammer. If you are close to the jammer, the mobile phone will lose signal at this time, which means that there is a mobile phone base station near your location or there is a signal amplifier indoors. In this case, it is recommended to use more and higher power jammers to meet your field shielding requirements.

Secondly, if the mobile phone shows a signal after the jammer is turned on, but the call quality is poor, it means that the shielding effect of the jammer on the mobile phone is in a critical state, and the shielding effect is unstable. This situation may be caused by the fluctuating signal strength from the base station signal to the site of use, or because of some mobile phones with strong anti-interference ability. In this case, it is recommended to use a more efficient full-band signal jammer to ensure a more stable shielding effect.

Finally, if the mobile phone shows that there is a signal after the jammer is turned on, but it is actually false, then the mobile phone cannot make normal calls or data Internet access, and there will also be no signal or limited services when making calls. This indicates that the phone has been blocked by the jammer. It is worth noting that the shielding range of the full-band signal jammer is related to the strength of the mobile phone signal at the location of the user. Generally speaking, where the mobile phone signal is strong, the shielding distance of the jammer will be shortened. For weaker places, the shielding distance will be extended.

In short, when encountering mobile phone signal problems when using a full-band signal jammer, it is necessary to conduct a reasonable analysis and treatment according to the specific situation. Only in this way can the effectiveness of the full-band signal jammer be ensured and a fair environment be provided for examination occasions.