IMSI Catcher is an intrusive piece of technology that can be used to locate and track all mobile phones that are switched on in a certain area.
IMSI Catcher does this by"pretending"to be a mobile phone tower-tricking your phone into connecting to the IMSI-catcher, and then revealing your personal details without your knowledge.
IMSI Catchers are indiscriminate surveillance tools that could be used to track who attends a political demonstration or a public event like a football match. They can even be used to monitor your calls and edit your messages- and you wouldn't even know it was happening.
This product can collect mobile phone electronic identification codes(IMSI, IMSI, MAC, mobile phone number), when the user enters the coverage area of the device, the identification code of the mobile phone is automatically collected, and the collected data provides a kind of big data analysis for the public security department.