When the mobile phone is within the effective shielding range of the signal blocker, the mobile phone's voice call function and Internet data transmission and other functions will be cut off, and the signal grid above the display screen will also disappear. At this time, the mobile phone is completely offline. Basic functions such as answering or making calls, sending and receiving text messages, chatting online, and playing games online cannot be used normally. At this time, some customers will ask questions: If the mobile phone signal jammer is turned off, how long will it take for the mobile phone to return to normal? Will the mobile phone signal be restored immediately when the mobile phone signal jammer is turned off?
The actual result may be different from what you initially imagined: the signal jammer has two different effects on the mobile phone at the moment of turning it on and off.
Let’s first talk about what happens when the mobile phone signal jammer is turned on: As long as the mobile phone is not very far away and does not exceed the effective shielding range of the shielding device, then at the moment of turning on the phone, the communication functions (including voice and data) of the mobile phone will be blocked. was blocked immediately, with almost no time difference between the two. Although some people may find that when observing the signal grid on the mobile phone screen, the signal grid does not disappear quickly or drop to zero, but in fact the signal grid at this time is just a false display. If the user of the mobile phone at this time Operate the mobile phone and trigger the external communication function of the mobile phone, and you will find that the signal grid display will quickly complete the status update.
After the signal jammer for cell phone is turned off, the signal recovery of the mobile phone must go through a process, which is the process of handshake communication between the mobile phone and its surrounding base stations, identity recognition, and registration into the network. The length of this process will be affected by several factors. This includes: different operators of mobile phones, different strength of base station signals, different number of mobile phone users in the service area of the base station, etc.