Now, the flip side is that up until 2007 at least, no one has been prosecuted for using a jammer, in most cases, the person has it confiscated and gets a warning. Drixnot April 16, 2010 at 7:05 pm legal in schools. The reason they made it illegal is that it infringes other peoples rights to use cell phones. Example. The U.S., in fact, has the strictest laws in the world against jamming cell calls. U.S. law prohibits not only buying, selling, carrying or owning a cell phone jammer, but also posting a. Cell Phone Jammer Schools Legal Wright Sam 2021-6-23 With the advent of the Internet era, more and more smart machines are appearing in our lives, and many friends who get mobile phones may only be able to talk on the phone. But now we can see that people holding smart machines in their hands can do a lot of work.