Cellular Jammer(2G/3G/4G) How to do?

Question

mobile connection

There is one idea that my friend and I want to implement, but for this we need a jammer, and that is cellular communication. No burglary or theft. There are a couple of diagrams on the Internet, but they do not cover all frequencies, and there is no exact requirement for details, as well as exact characteristics. Of the acquaintances, only theorists, who also do not understand what, why and how. Experts who are ready to do this for money say that it is cheaper to buy, and this is from 5000 UAH ($180). Do you have any sketches, literature, diagrams? I will be glad for any help.

Answer 1

The experts are a bit misleading.
The price tag for such devices starts at $ 600.
The format is a suitcase with 5-8 antennas.
The total power of this device is 5 watts per range.
Cellular communication ranges are 4-5 generally accepted, plus wifi but there are few 0.2 watts and bluetooth
Plus, either you need a license or buy something in gray.