Metal Shell Mobile Phone Signal Jammer: Pros and Cons

Mobile phone signal jammers are devices used to block or interfere with mobile phone signals, preventing them from reaching their intended destination. One type of mobile phone signal jammer is the metal shell mobile phone signal jammer, which refers to a device with a metal body, typically made of aluminum. The metal material serves as both the outer casing and the heat sink. In this article, we will discuss the advantages and disadvantages of metal shell mobile phone signal jammers.


  1. Simple structure: Aluminum profiles, being the most commonly used heat dissipation material, have excellent heat dissipation performance. The heat sink fins of aluminum profiles can be processed into various shapes, making it convenient to use them directly as the outer casing of the mobile phone signal jammer. This provides a certain level of aesthetics and craftsmanship.
  2. Low cost: Aluminum profiles have large production volumes and wide applications, resulting in lower material costs for mobile phone signal jammers. At the very least, it saves the cost of a dedicated casing.


  1. Poor safety: Since the casing itself acts as a heat sink, metal shell mobile phone signal jammers require significant heat dissipation when operating for long periods. This can cause the temperature of the metal casing to rise rapidly, with surface temperatures sometimes reaching 60-70 degrees Celsius. Direct contact with the human hand can result in burns.
  2. Unattractive design: Metal shell mobile phone signal jammers have external antennas that are directly screwed onto the body. With the increasing need to block multiple mobile phone standards such as 2G, 3G, 4G, 5G, and WIFI signals, a single mobile phone signal jammer requires at least 10-12 frequency bands, corresponding to 10-12 antennas. When such a large number of antennas are attached to the device, it visually resembles a hedgehog and lacks aesthetic appeal.
  3. Poor resistance to damage: In this type of mobile phone signal jammer, the antennas are screwed onto the body, and the power supply is an external switch power supply. This makes it susceptible to damage. For example, someone may maliciously disconnect or discard the antennas, or intentionally disconnect or damage the power supply. Such poor resistance to damage results in high management and maintenance costs for users.


Metal shell mobile phone signal jammers have their advantages and disadvantages. While they offer a simple structure and low cost, they also have safety concerns, unattractive design, and poor resistance to damage. When considering the use of a mobile phone signal jammer, it is important to weigh these factors and choose a device that best suits the specific requirements and preferences.