The Cell-Site Simulator Warrant Act of 2025 aims to regulate the use of cell-site simulators, devices that intercept mobile phone signals to track locations and gather user information. The legislation seeks to protect individual privacy rights while allowing law enforcement to utilize these tools under strict conditions. Key provisions include a general prohibition on the use of cell-site simulators by unauthorized individuals and entities, with specific restrictions on their use by intelligence agencies surveilling U.S. citizens.