How does the mobile jammer work?

Mobile phone jammers work like jammers because they emit the same radio frequency as the mobile phone operates. This will cause enough interference and you will not be able to connect the call to the phone. Currently, there are two types of cell phone jammer. The first category is usually a small device that can block the signal from a cell phone tower to a single cell phone. The blocking frequency is 800MHz to 1900MHz. Most devices using this technology can block signals within a 30-foot radius. The phones in this area show no signal at all.