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Talking about the influence of mobile phone signal jammer on people

   The cell phone jammer currently on the market generally have effective frequencies: 869——894MHz; 825——960MHz; 1805——1880MHz and 1900——1990MHz, etc. The effective frequency bands are CDMA800, GSM900, DCS1800, and PCS1900. It...

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Solution to cell phone signal jammer in prison

In order to meet the requirements of new trends, improve the high-tech prevention level of prisons, improve the high-tech management capabilities of prisons, promote the establishment of data information management...

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