Why does the phone still have a signal despite the interference of a full-band signal jammer?

The use of full-band signal jammers in school exams is becoming more and more common, but some issues must be addressed before use. A common question is why the phone still shows a signal after turning on the jammer. The following reasons may explain this phenomenon:

1.The interference effect is not obvious or the jammer range is not enough:

When the phone screen shows a signal and you can make a good call, it means that the Cell Phone Jammer may not effectively interfere with the signal or the interference range is limited. Similarly, if the phone is close to the jammer but still has no signal, it means that the installed jammer is not enough to meet the interference requirements of a specific location. In this case, a signal jammer with higher power is required.

2.Unstable interference effect and range:

Sometimes the phone can show a signal, but the call quality is poor. This shows that the interference effect of the full-band signal jammer on the mobile phone is in a critical state. Although there is a certain amount of interference, the interference range is unstable. This may be due to unstable signal strength from the base station to the location where the jammer is used, or some mobile phones have strong anti-interference ability.

3.False signal:

When the mobile phone shows that there is a signal, but cannot make calls or surf the Internet normally, it may be a false signal. When the mobile phone makes a call, it will show no signal or limited service, which indicates that the signal displayed by the mobile phone is false, but the actual mobile phone is blocked and cannot communicate normally with the outside world.

It should be noted that the interference range of the full-band signal jammer depends on the strength of the mobile phone signal in the user’s location. The stronger the mobile phone signal, the shorter the interference distance of the jammer. Conversely, the weaker the mobile phone signal, the larger the interference range of the jammer. Best-selling WIFI jammers and GPS jammers in Europe and America.

In summary, before using the full-band signal jammer, it is necessary to combine the site conditions and equipment conditions to determine the best deployment plan to ensure that the interference effect is as expected, and consider the impact of the interference on the normal communication service and the possible social consequences of the mobile phone.

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