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mobile phone jammer


Information Security of Railway Train System-GSM-R SIM Card
Information Security of Railway Train System-GSM-R SIM Card

Some train operators need to use GSM-R SIM cards to ensure that the train is connected to the control center. Although most GSM-R SIM cards use encryption, hackers can use GSM jammers to block the communication channel between the train and the control center. The GSM signal blocker can prevent the mobile phone from receiving signals from […]

mobile phone jammer
mobile phone jammer

In the Internet age, information is very important to us, which is related to our personal identity information and property information. How to protect our personal information has become an important means for most people to use signal jammer . Large exam venues, prisons, movie theaters, churches, etc. all need jammers to maintain order and quiet on […]


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