There are times that you might be in places wherein your cell phone signals may not be working or even your Bluetooth. seeing that your Wi-Fi is also not working is what you can also realize when you are in these places. 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. It is when people create distractive noises using their phones in these places that they will be disturbing other people in that same place. 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. When you are talking about phone blocker , then you will see them often in theatres, religious places like churches, like hospitals, libraries, museum etc. It was not soon enough that people with criminal minds have been using these devices for their criminal acts. It is the robbers that use signal jammers to make re that the homeowners will not be able t call authority.
It is because of the reasons that were stated that many countries have banned the signal jammers. It is also because of these interference that there are many emergency calls that have been disrupted. It is in some countries that you can still use signal jammers in private but it is prohibited in public areas. You also need to ask permission from the authority before you will be able to use them. One of the places wherein signal jammers are legal used are in banks and in jails . The moment that these signal jammers are used in these places that basically bank robberies are prevented. It is also when there is a military operation that signal jammers are also widely used. It is these devices that should be used with precaution whatever the reason it is for. It is when you will be doing this one that any unintended interference will be avoided. It is this precaution that is very valuable to see to it that any emergency calls will still make it through.
But regardless of the banned that has been imposed on these devices you can still purchase them online. It is online that you will be able to buy these devices at a very good deal. Most of the signal jammers that you will see online are the ones that also looks like a cell phone. Before you will able to use them, you have to see to it that they are fully charged. Blocking certain frequency is also what some signal jammers can do since they have a frequency filter.