Cell phone signal jamming device can be used in what place?

RenaldoZ06

Mobile phone signal jammer is very popular, the use of jamming devices where a lot of, the school is I know which one of the most widely used, in addition, it also is used in what place?

jammerbuy

In addition to schools, prisons, courts, churches, state security agencies, military and political units all use cell phone signal jammer as security tools.