Popular 3G 4G 5G Cell Phone Jammer for sale

When the mobile phone is working, it is within a certain frequency range. The mobile phone and the base station are connected by radio waves to complete the transmission of data and sound with a certain baud rate and modulation method. The common mobile phone signal jammers on the market have the following frequencies: 869 - 894MHz; 925 - 960MHz; 1805 - 1880MHz and 1900 - 1990MHz, etc. The working frequency bands are CDMA800, GSM900, DCS1800, and PCS1900.

The cell phone jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the working process. The scanning speed can cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone is manifested as searching the network, no signal on the mobile phone, no service system, etc.

Therefore, mobile communication is also called cellular mobile communication. As far as the mobile phone in each cell is concerned, it communicates with the base station through the uplink frequency of the channel, and then transfers the signal to the MSC to communicate with other mobile phones or fixed phones. The radio frequencies received by the mobile phone are divided by frequency band:

GSM segment 925-960MHz, DCS segment 1805-1880MHz, CDMA segment 869-894MHz, PHS PHS 1900- 1990MHz, SCDMA450- 470MHz, wCDMA2110-2170MHz, TD-SCDMA2010- 2025MHz. Each frequency band is divided into many channels with a certain bandwidth. Each cell uses several channels, one of which is called the broadcast control channel, represented by BCH, and the other channels are called the traffic channel. In the standby state, the mobile phone starts the receiving circuit intermittently to receive the BCH in the cell where it is located. According to the field strength of the BCH signal, the signal bar is used to display the signal strength indicator RSSI on the LCD. When making an outgoing call, the first step is to ask the MSC for instructions through the BCH, and the MSC handles the calling or the called party. The MSC assigns a service channel to the mobile phone according to the channel status in the cell, so that the mobile phone jumps from the BCH to the service channel to realize the call. It can be seen from this that the BCH in the community is the medium and advance condition for realizing mobile phone communication. If the mobile phone cannot find the BCH in the community, there will be no network name and signal strength indication on the light screen LCD, that is, the mobile phone will be in no network, no In the state of network access, the mobile phone cannot realize the function of calling or called, that is, the mobile phone signal is equivalent to being blocked.

Phone signal jammer is a mobile phone jammer that can effectively block 2G 3G 4G 5G network. It is a mobile phone signal digital blocker for mobile communication with high efficiency and high reliability. The product adopts advanced adaptive digital technology, high-efficiency HPA technology, and TD-SCDMA/TD-LTE synchronization technology. While achieving efficient shielding, it does not interfere with any operator's base station of any standard.

A cell phone jammer is a device that blocks reception between cell towers and cell phones. Developed for the military and law enforcement, the devices were originally created to counter threats such as cellphone-triggered explosives and hostage situations.

Cell phone jammers, known as cell phone jammers, signal blockers, GPS jammers or text blockers, block radio frequencies within a given area, creating a kind of signal traffic jam that blocks all communications. Just like a radio mute bubble, as long as the user is within range of a cell phone blocker, no calls or texts can be sent or received.

Proponents of the technology argue that signal-jamming devices are necessary in many places where humans seem unable to abide by widely accepted rules of proper cell phone etiquette. Think schools, theaters, vehicles, or other quiet train trips...just about any place where talking, texting, streaming, etc. might be considered disruptive or even dangerous.

Keep in mind that mobile signal jammers don't just block voice and text on your phone, they can also interfere with GPS, WiFi, and perhaps most problematically - police radar. That's why, as mentioned above, the federal government bans the sale, promotion, and use of cell phone jammers in the United States. So if you want a little peace and quiet with your shiny new signal blocker, you might just have to settle for earbuds.