Is the GSM900 in the mobile phone signal jammer only 2G shielded signal?

In the product introduction of many mobile phone signal jammers, there will be a logo about the GSM900 frequency band, which indicates that the device has the signal shielding ability for the GSM900 frequency band. A customer asked a question because of this: Is the GSM900 frequency band the 2G frequency band? Is the GSM900 in the cell phone signal jammer only 2G shielded signal?

If this question was placed 10 years ago, the answer would be correct. The GSM900 frequency band at that time really refers to the frequency band of the 2G standard. The GSM900 frequency band in the mobile phone signal jammer is to shield the signal in the frequency range where the downlink signal is located. Coverage, the specific frequency range is: National Standard: 930-960MHz, European Standard: 925-960MHz.

However, today, with the development and rapid development of 4G and 5G, as well as the 2G network retreat project that operators have already started, each operator has launched a re-cultivation strategy for the GSM900 frequency band, re-farming the original GSM900 frequency band. Deployment and allocation, this has led to the fact that not only a part of the original 2G network is part of the GSM900 frequency band today, but also mixed with 3G and 4G mobile phone signals.

Although the above adjustments have been made, in fact, it has no real impact on the mobile phone signal jammer. Because even if 3G and 4G signals are added to the GSM900 frequency band, the overall bandwidth of this frequency band has not undergone major adjustments. The shielding signal of this frequency band in the mobile phone signal jammer still completely covers 930-960MHz.

Finally, we provide a supplementary information: the frequency range of 930-960MHz in the range of mobile phone signal jammers, of which 930-933MHz belongs to China Railcom, 935-949MHz belongs to China Mobile, and 949-960MHz belongs to China Unicom.