Cell-Site Simulator Warrant Act of 2025

The Cell-Site Simulator Warrant Act of 2025 requires law enforcement agencies to obtain a court-issued warrant before using cell-site simulators (devices that mimic cell towers to track or intercept phone communications), with specific requirements to limit surveillance scope. Agencies must demonstrate other investigative methods have failed or would be too dangerous, specify the narrowest possible area and time frame for use, and disclose potential disruptions to emergency services like 911 calls. Exceptions exist for emergencies (requiring 48-hour warrant applications), certain research, and protective services, but information about people not under investigation must be minimized and destroyed. The bill also mandates annual reports to Congress on usage patterns and requires third-party testing of devices to verify accuracy before deployment.