Cell-Site Simulator Warrant Act of 2025

The Cell-Site Simulator Warrant Act of 2025 requires law enforcement agencies to obtain warrants before using cell-site simulators (devices that mimic cell towers to track or intercept phone communications), with strict requirements for demonstrating necessity and minimizing disruption to communications. The bill prohibits most uses of these devices without a warrant, including the use of evidence obtained through unauthorized surveillance, and establishes specific procedures for emergency use with subsequent warrant applications within 48 hours. It requires transparency about potential disruption to emergency services (including 911 calls) and mandates regular reporting on usage to Congress. The law applies to federal and state law enforcement, with specific exceptions for intelligence gathering, research, and correctional facility contraband interdiction systems.