The Role of IMSI Catchers in Cellular Communication Monitoring

An IMSI catcher is a surveillance tool that covertly collects unique identifiers, such as the International Mobile Subscriber Identity (IMSI) and International Mobile Equipment Identity (IMEI), from mobile phones within its operational range. This process occurs without the knowledge of service providers or phone users, enabling agencies to detect and monitor target devices in specific areas.They are available in multiple form factors, including portable units, vehicle-mounted systems, and drone-mounted versions, each tailored to specific tactical needs.

IMSI catchers are available in various configurations to suit different operational needs:

Standalone Version: A low-power device ideal for small coverage areas, with a maximum range of up to 25 meters.

Backpack Version: A medium-power system suitable for medium coverage areas, offering a range of up to 250 meters.

Vehicle-Mounted Version: A high-power system designed for stationary or mobile operations, effective in urban or open areas over long distances.

Drone-Mounted Version: A system mounted on drones to search and track cell phones in restricted areas, capable of reaching up to a 15 km radius.

Modern IMSI catchers offer a range of functionalities:

Network Scanning: Automatically detects active 2G, 3G, 4G, or 5G (NSA) networks to capture IMSI, IMEI, TMSI, and handset location information.

Base Station Emulation: Simulates service provider networks across various generations (2G to 5G) for seamless interception and analysis.

Dynamic Target Control: Identifies IMSI, IMEI, and TMSI information within its range and offers capabilities like denial of service.

Target Location Detection: Displays the accurate location of targets on an integrated Geographic Information System (GIS) application, compatible with portable direction-finding systems.

Selective Jamming: Allows operators to block specific services (2G to 5G) for selected mobile handsets.

Target List Management: Enables the use of pre-set target lists, providing instant reports when a target enters the system’s coverage area.

Link Analysis: Compares IMSI and IMEI data collected over different periods to identify links between locations and times visited by the target.

IMSI catchers are powerful tools for intercepting and monitoring cellular communications, offering various configurations and features to meet diverse operational requirements. For more information about IMSI catchers and how they can be integrated into your operations, please reach out to us.