In real life, no APP software can provide the function of blocking mobile phone signals for other people's mobile phones.

　　The person who made such a request should have confused the function of mobile phone spyware or Trojan horse program with the function of mobile phone signal jammers.

　　We do not deny that some malicious APP software has the characteristics of spyware, which can steal user information privately and even let the mobile phone execute basic functions or programs without the user's awareness.

　　However, such functional features are completely different from the functional features of cell phone signal shielding.

　　The so-called mobile phone signal shielding means that the mobile phone cannot complete normal communication with the base station at all. The mobile phone shows no signal, no network, cannot answer and make calls normally, cannot send and receive text messages and use data traffic, etc. That is to say, the mobile phone is in a state of being completely disconnected from the network.

　　And the usual spy APP software or Trojan horse program, it must first show concealment and deceptiveness, so that users cannot find it quickly. Therefore, when this type of APP software works, the original working state and performance of the mobile phone will not be significantly changed, and the mobile phone itself can also communicate normally with the outside world.

　　What's more, some people even hope that there is such an APP software that can remotely block the mobile phone signal for a specific mobile phone number. Such functional requirements are even more outrageous and unreasonable.

　　What should I pay attention to when using the jammer?

　　All antennas must be screwed on before starting work.

　　Under normal use, the antenna should be perpendicular to the ground to obtain the maximum shielding range.

　　Do not put the hand-held mobile phone signal jammer into water or close to the fire source, and do not use the jammers gps in places with excessive humidity, overheating, high voltage or high radiation.