Understanding Mobile Signal Blockers: Common Questions Answered

Addressing Concerns about Health Effects, Signal Display, and Device Performance

Mobile signal blockers, also known as signal jammers or signal disruptors, are devices that interfere with mobile phone signals. However, many customers have various questions and concerns when it comes to purchasing and using these devices. This article aims to provide clarity on some common queries regarding mobile signal blockers, including their potential health effects, impact on signal display, and device performance.

1. Are mobile signal blockers harmful to human health?

Most mobile signal blockers, commonly used for disrupting mobile phone signals, do not pose a threat to human health. Radiation can generally be classified into two types: ionizing radiation and non-ionizing radiation. Ionizing radiation, such as X-rays or nuclear radiation, can be harmful to the human body but is encountered less frequently in daily life. Non-ionizing radiation, on the other hand, includes electromagnetic radiation generated by common household appliances and falls within the category of everyday exposure. Therefore, the use of regular mobile signal blockers does not pose a significant risk to human health.

2. Why does my phone still display signal after activating a signal blocker?

Some customers may encounter a situation where their phone continues to display signal bars even after activating a signal blocker. This occurs because although the phone remains connected to the base station and can receive signals, the strength of the signal is insufficient for normal phone calls or internet usage. The signal bars displayed on the phone are misleading, and attempting to make a call or access data will reveal the absence of a signal. Consequently, the signal bars on the phone will disappear.

3. Will prolonged use of a mobile signal blocker cause damage to the device?

It is normal for the casing of a mobile signal blocker to become warm after a period of use. Like most electronic devices, continuous operation generates heat, which accumulates and causes the surface of the device to warm up. As long as the temperature remains within the device’s tolerance limits, it will not cause any damage, and the device will continue to function normally. Additionally, many mobile signal blockers are equipped with cooling fans to ensure stable operation over extended periods, reduce the risk of malfunctions, and enhance their lifespan.

4. Can a mobile signal blocker interfere with the normal functioning of other devices?

Generally, mobile signal blockers do not interfere with the normal operation of other devices. The electromagnetic signals emitted by signal blockers are within the internationally regulated frequency bands used by mobile phones. They only disrupt the corresponding communication frequencies of mobile phones. As long as the working frequencies of other devices are different from those of the mobile signal blocker, they should not be affected.


Understanding the basics of mobile signal blockers is essential for customers considering their purchase and use. This article has addressed common concerns regarding health effects, signal display, and device performance. By clarifying these aspects, individuals can make informed decisions about the use of mobile signal blockers without compromising their own safety or the functionality of other devices.