Here you can find your own jammer

Despite its outward appearance resembling a walkie talkie, that seemingly innocuous device possesses an astonishing level of potency. Once activated, a mobile phone signal jammer has the capacity to disrupt all cellular services within its vicinity. However, it is important to bear in mind that employing such a device not only constitutes a federal crime but also carries the potential for a significant $16,000 fine and imprisonment.
Eric, a man residing in Philadelphia, refused to tolerate the incessant cell phone conversations on the SEPTA 44 bus. NBC 10 in Philadelphia revealed that Eric resorted to using a block signal jammer to drown out the unwanted noise.
"A lot of people are extremely loud, no sense of just privacy or anything. When it becomes a bother, that's when I screw on the antenna and flip the switch," Eric told NBC 10.
Eric contended that he lacked knowledge about the illegality of impeding a cell phone signal, deeming it to be a "gray area." He expressed his understanding that such actions were only deemed illegal when they interfered with television or radio signals.
Nonetheless, he did not express much regret for his actions.
He proudly declared to NBC 10 that he is taking matters of law enforcement into his own hands.
The jammers, like the one utilized in this particular case, are considered illegal as they have the ability to hinder cell phone communication during emergencies and disrupt important signals such as police radio and other two-way radios.
After realizing that it was against the law, Eric mentioned his plan to dispose of the jammer he had bought, which ABC News valued at $300.
Nevertheless, the primary issue is that Eric is not the only person participating in this jamming practice.