Hi! I want to know what product I can use to block those frequencies: 850-925MHz, 894-960MHz, 1500-1990MHz, 1805-2170MHz, both digital and analog standards
As I have already said these jamming devices, GSM signal blockers or GPS jammers are used in many countries of the world. But it will be better for you to read something about the operation of these jammers. Another important information to know is what frequency jamming devices use. Many people use these signal blocking devices, so we tried to develop some simple principles of using a cell phone jammer safely, without harming anyone.
In order to deal with all those frequency bands successfully and at the same time you need a powerful device which can work with many frequency ranges at the same time, and quite effectively. This device is called Multifrequency Analog And Digital Signal Jammer and thus it will definitely help you to maintain the air surrounding you with no wireless signals!
From this point of view, I understand why these cell phone signal blockers are so popular in many countries around the world. They are widely used for protection because people want to protect their privacy and the privacy of those they love.