The mobile cell phone jammer device sends a signal of the same frequency as the mobile phone, and the two signals collide with each other and cancel each other, and the power is enough to overwhelm the mobile phone. Mobile phones are designed to increase power with little interference. Therefore, the interferer needs to understand and adjust the improvement of mobile phone performance. The mobile phone is a full-duplex device. That is, one uses two separate frequencies to make a call, and the other uses simultaneous listening. Some cell phone signal jammers only block one of the frequencies used by the cell phone, and both frequencies are blocked. The phone can only receive one of these frequencies, which makes me think it has been discontinued. Less complex devices only block a set of frequencies, while complex cell phone jammers can block multiple network types at the same time to turn off dual-mode or triple-mode phones. These phones will automatically switch between different network types to find open signals. Some high-end devices block all frequencies at the same time, while others can be tuned to specific frequencies.
“Today, criminals are using the latest methods,” Prosecutor Bliss Robin said in mid-April. He described a seizure related to the arrest of a team suspected of being assassinated in 2014. In addition to the classic police bracelets and beacons, investigators also found mobile phone signal jammers and GPS beacons. The judge admitted that these were originally used in spinning mills and have long been the prerogative of investigators, but criminals are now using “judicial police.” In addition to this seizure, two sources near the document also stated that another recent criminal case filed in Marseille placed satellite spies on the victim’s paid vehicle. In this case, the victim is the main suspect in human trafficking and is suspected of participating in multiple murders. The enemy is actively looking for the victim. According to sources near the file, they came from a hostile rogue who vowed to have their own skin.