It is common sometimes to be in place wherein your cell phone signal may not be working and even your Bluetooth devices. It is also in these places that your Wi-Fi may also nit be working. It is when you experienced these things that you might be in an area where there are cell phone blocker . It is your call that will be blocked the very moment that these signal jammers are in pace .
The initial purpose of these devices is to make sure that no one can be able to receive calls especially in public places where silence is needed like the theater and the library. Making distractive noises with their phone is what some people will be doing especially when they are in these places disrupting other people. It is the phone jammer that will be able t prevent this in from happening and that is why they are installed in these places. It is these devices that you will see in places like theatres, religious places like churches, like hospitals, libraries, museum etc. But you cannot really avoid people with criminal minds to be using these devices in their criminal act. For most homeowners, they will not be able to make any call to the authorities whenever there is a robbery since the robbers will use them to block signals.
It is because of the reasons that were stated that many countries have banned the signal jammers. Many emergency calls have also been disrupted due to the interference that it is making. It is in some countries that you can still use signal jammers in private but it is prohibited in public areas. Asking permission from the authority is what you also should need to do so that you will have permission to use them. It is in jail and banks that signal jammers are legal to be used. The moment that these signal jammers are used in these places that basically bank robberies are prevented. The very moment that there will be a legitimate military operation, then these signal jammers are also legal to use. No matter what kind of purpose it is when you are using a signal jammer, you still have to see to it that it will be used with care . Any unwanted interference will be prevented the very moment that you will be doing this one. It can be very valuable especially when there are any emergency calls.
Regardless of these devices have been banned, there are still some online shops that sell these signal jammers. The moment that you will be going online, then you will be able to find these signal jammers at a god price. The common look of a signal jammer that you will see online are the ones that looks like a cell phone. Before you will able to use them, you have to see to it that they are fully charged. The moment that a signal jammer will be able to block certain frequencies, then they are the ones that have a frequency filter.