How do cell phone signal jammers work? What should I consider when purchasing one?
Based on the communication principle of a cell phone signal jammer, the signal blocker for sale scans the forward channel at a constant speed, moving from the low end to the high end. This scanning speed creates garbled interference in the incoming signal, preventing the phone from detecting legitimate data sent from the base station and thus preventing it from establishing a connection. The phone will then experience symptoms such as searching for a network, no signal, and no service. The jammer uses frequency multiplication, frequency division, and frequency hopping filtering to analyze the required blocking frequencies for the uplink and downlink channels of the mobile phone system. A spherical shielding chamber is customized based on the jammer's power level, automatically generating a shielding magnetic field within a specified range, rendering mobile phones (including PHS (Little Smart), GSM (China Unicom, China Mobile), and CDMA (China Telecom)) inoperable within this space. When the jammer is in operation, it disables the transmitting and receiving functions of mobile phones within the specified range, preventing them from making or receiving calls, thereby effectively disabling them.
Before purchasing a cell phone signal jammer, you should consider some specific factors:
1. Surface area. The shielding range of a cell phone blocker depends on its power. Field testing will reveal different shielding ranges depending on the strength of the local signal environment. For example, indoors, where signals are weak, the shielding range is greater. Outdoors, where accessories like GSM base stations are located, the shielding range for GSM signals is shorter.
2. Power. This refers to the commonly known 2G, 3G, 4G, and 5G signals. Before purchasing, you need to know which signals you want to block. Standard cell phone signals (2, 3, 4, and 5G) can be selectively blocked. If you only want to block 2, 3, or 3, 4G, this can be adjusted at the factory. There are also frequency bands such as 2.4G WiFi and 5.8G WiFi. Generally, common signals can be quickly blocked.
3. Frequency Range. Shielded bands: CDMA800, GSM900, SCDMA1800, DCS1800, PHS1900, TD-SCDMA (China Mobile 3G), CDMA2000 (China Telecom 3G), and WCDMA (China Unicom 3G).
These are the essential steps and relevant knowledge required to purchase a 5G cell phone signal jammer. Dazhan Electronics specializes in cell phone signal jammers and provides consultation and service.
Signal Blocker Image Gallery
