Signal blocker Boddington - signal blocker Northville
The question you have asked is very uncommon but quite interesting to study. The process of mobile phone creation is not as simple as it may seem to somebody. It requires a lot of work being done in creating, designing, constructing and manufacturing all parts of the cell phone and combining them together.
Despite all hardness of the process a group of earlier unknown but now very famous German guys built their own mobile phone, and not just any phone but iPhone 5 prototype! Can you imagine that?
As you can see when there is a lot of will and skills - anything is possible. Even mobile phones might be hand-made. If you like that way of tech development, you can try to create something alike. But if you have the opposite point of view, you can purchase signal jammer for personal use or learn how to create your own jammer to be able to counter those German guys’ creation.