All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
(358 products available)
Ready to Ship
Ready to Ship
Mobile phone signal blockers are available in different configurations depending on the application. Some common types of these signal-dampening devices include.
Multi-band signal jammers
These devices can block mobile signals from several network frequencies. This makes multi-band signal jammers suitable for various environments. They are often used in corporate offices with different mobile network providers and educational institutions. Multi-band signal jammers ensure that no calls or messages are received while still being able to communicate through intercoms and walkie-talkers. Multi-band jammers can also be configured to shield several types of signals such as GPS tracking, 4G LTE, and Wi-Fi.
CDMA signal blockers
CDMA signal blockers are specifically designed to block signals from mobile phones operating on CDMA networks such as Verizon and Sprint. These jammers can effectively disrupt phone calls and text messages on CDMA networks. These signal blockers tend to be more commonly found in private areas where blocking of only a single type of mobile network is desired.
Wi-Fi jammers
Wireless fidelity jammers are designed to obstruct Wi-Fi signals, preventing users from connecting their devices to the internet. These jammers are commonly used in locations where public Wi-Fi access is considered a security risk or where monitoring of internet activity is required. For instance in government facilities or military bases.
Broadband signal blockers
These blockers can jam a wide range of frequencies used by different mobile networks and communication technologies. They are often used in secure environments where uninterrupted communication is necessary. They effectively block all forms of mobile communication including voice, text, and data. Some broadband jammers also have customizable frequency filters, thus allowing users to select specific frequencies to block.
Handheld signal jammers
These are portable devices that can easily block signals in a small radius. Handheld jammers are often used for temporary blocking in specific areas or during certain events. For example, they are commonly used by law enforcement agencies when conducting operations in sensitive areas. These jammers are also favored by individuals who wish to have privacy in their personal lives.
The durability of mobile phone signal blockers depends largely on the materials used in their construction. The most common materials used to build mobile jammers include.
Metal housings
Signal blockers usually employ metal such as aluminum or stainless steel to form the exterior casing of the device. This is because metal provides effective shielding against electromagnetic interference. It will also protect the internal components from damage due to impact or other harsh environmental conditions.
Plastic enclosures
Some portable handheld signal blockers are housed in durable plastic enclosures. While not as strong as metal, high-quality plastics can withstand significant wear and tear. They also offer some level of protection against water and dust ingress. Therefore, plastic enclosures are commonly used for handheld or compact signal blockers that are intended for outdoor use.
Ceramic and dielectric materials
Ceramic and other type dielectric materials are commonly used to construct the antenna of mobile signal jammers. These materials help boost the antennas by providing better signal blocking capabilities. In addition, durable antennas ensure that the signal blocker can be used in various environments without degrading its signal jamming capability.
Flexible polymers
These materials are sometimes used to construct mobile signal blockers that need to operate in extreme temperatures. This is because flexible polymers have a very low chance of cracking or breaking under thermal stress. The use of heat-resistant polymers also increases the overall lifespan of the mobile phone signal jammer. They are commonly found in devices intended for use in outdoor environments where exposure to extreme heat or cold is likely.
Waterproofing materials
Many mobile phone signal blockers come with an IP rating, indicating that they are waterproof and dustproof. This is achieved through the use of rubber gaskets, silicone seals, and other such sealing methods. These prevent water and debris from entering the internal components, thus increasing the durability of the signal blocker. Waterproof signal jammers are particularly useful for outdoor or marine applications.
Some common places where phone signal jammers are used include.
Classrooms
Mobile phone signal blockers can help minimize distractions and keep students focused on lessons. When installed in classrooms, they prevent students from using phones and can help teachers maintain classroom discipline. It ensures that important announcements or instructions are not missed.
Corporate offices
Mobile phone signal blockers can help minimize distractions during meetings or work hours. They can be installed in conference rooms or other important areas to ensure employees remain focused on work-related tasks instead of personal calls or messages.
Secure government facilities
Mobile phone signal blockers are crucial in protecting sensitive information from potential leaks. They prevent unauthorized communications and ensure that classified information does not get out. These blockers are commonly used in military bases, intelligence agencies, and other secure government facilities.
Museums and galleries
These places are often busy with a lot of visitors who may want to call someone or take pictures. However, to protect the art and artifacts within these places, signal blockers are installed. They help minimize noise and ensure that visitors remain focused on the exhibits without distractions. Most importantly, they prevent the use of mobile phones which could lead to poor picture taking or worse, bad behavior.
Event venues
Event organizers install mobile phone signal blockers in arenas, concert halls, and theaters to enhance audience engagement. These blockers prevent distractions during events, ensuring attendees focus on the performance rather than checking their phones. They also help boost ticket sales by offering premium seating with a better signal-blocking experience.
Prisons
Mobile signal blockers are commonly used to prevent inmates from communicating with the outside world. By jamming cellular signals within prison walls, these devices help maintain security and prevent the illegal activities that often result from such communications. Signal blockers also help reduce the problems and gang activities that are associated with inmate communication.
Mobile phone jammers tend to be very important, especially in protecting sensitive areas from unauthorized communications. That said, here are some factors that a buyer should consider when purchasing these jammers.
Purpose
Buyers should first identify the main reason for purchasing the signal blockers. This will help them decide on the type and how much shielding these devices will provide. For example, government facilities may need broadband jammers that can handle a larger area. Schools will often install handheld jammers that are meant for smaller spaces.
Frequency range
Buyers should ensure the signal blockers they purchase cover the necessary frequency bands for the mobile networks they intend to jam. For instance, CDMA signal blockers are used to block CDMA signals. 4G LTE jammers should be used where there is 4G LTE service. Blockers that cover multiple frequencies are sometimes preferred for their versatility.
Power and range
The strength and effective range of a phone signal jammer will affect how well it works in a given space. Those aimed at secure facilities usually have greater power and range than those for classroom or conference room use. Buyers should consider the size of their installation site and the required coverage when selecting a power and range-based jammer.
Legal compliance
Mobile phone signal blocking devices are tightly controlled in certain jurisdictions due to their potential misuse. Buyers should familiarize themselves with local laws regarding the use of signals before purchasing. In some cases, jammers that operate within legal power limits or have specific licenses may be required to ensure compliance.
Indoor or outdoor use
Some phone jammers are better for indoor use, such as in offices or schools, while others are designed for outdoor use, such as in construction sites or military operations. Buyers should consider where the signal blocker will be used most frequently and choose an appropriate device. Furthermore, those intended for outdoor use usually have more robust weatherproofing, like IP rating.
Signal blockers are very closely regulated because they pose a large threat if misused. While some countries may allow the use of these blockers in specific areas, like government facilities, most countries require a permit or license to use them.
Most mobile signal jammers are designed to block a range of signals, including GSM, CDMA, 3G, 4G, LTE, and W-Fi. Those that are broadband can block several types of mobile communications at the same time.
Most large facilities install signal blockers through a distributed antenna system. A series of internal antennas are mounted throughout the building to provide complete coverage, effectively jamming mobile signals. Then, the power and placement of these antennas are configured to ensure even coverage throughout the entire facility.
Yes, these jammers can interfere with emergency communications if not properly managed. For example, a broadband jammer could potentially block emergency responders' signals inside a secure facility. It is very vital that organizations carefully select and configure their signal blockers so that they do not obstruct emergency services but still ensure security.
