Mobile phone jammers interfere with digital signals in the frequency band by sending Power triangular waves. If the antenna is placed unreasonably, or the distance is long, or there are obstacles in the middle, it will affect the interference effect. First test to see if the mobile phone is also interfered near the antenna. If you can talk normally here, it means that Cell Phone Jammer App For Blackberry is malfunctioning or the antenna is incorrectly connected. Of course, it may also be incorrectly set. cell phone jammer If there are frequency bands, different mobile phones use different frequency bands for interference. There are two types of GSM, 900M and 1800M. The uplink frequency of narrowband CDMA is: 824MHz-849MHz, and the downlink frequency is: 869MHZ-894MHZ. PHS is a 2G frequency band, so they are different. The jammer should have a specific logo.
Nowadays, in the era of mobile Internet, smart phones have become very popular. However, while bringing convenience to people's lives, things that are used to engage in illegal activities are also emerging in endlessly. Take exams, for example. In the past, cheating on exams relied on taking cheat sheets, smuggling paper slips, and even writing formula questions on their arms and legs. But in this information age, the participation of Cell Phone Jammer App For Blackberry is indispensable in the examination room. The emergence of mobile phone signal jammers has solved many hidden dangers of disrupting the order in the examination room, allowing candidates to take the exam in a fair environment. So many schools will choose to install mobile phone jammers.