This cell phone network blocker holster can effectively jamming mobile phone signals, so you will not be disturbed by incoming calls. When someone dials the phone, you will receive a "The user you are calling is temporarily out of service."
Mobile phone jammers eliminate security risks
The working principle of the portable mobile phone signal jammer is also relatively simple. It is to use frequency multiplication, frequency division, frequency hopping filtering and other technologies for the electromagnetic frequency uplink and downlink channels covered by the mobile signal to analyze the required shielding frequency. When the shielding device is in working condition , customize a spherical shielding space according to the power of the shielding instrument, so that the mobile phone in this space is invalid, unable to receive and call out, so as to achieve the purpose of forcibly disabling the mobile phone. At present, the working time of mobile Cheap $1 - $100 Mini cell phone jammer sold on the market generally exceeds 24 hours, and the range of shielding signals ranges from a radius of 20 meters to a radius of 70 meters. To put it simply, it is possible to spend thousands of yuan, and all mobile phones in a building may not be able to dial out or call in, which is a great security risk.