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... The Supreme Court ruled on Monday that people have an expectation of privacy from the government as their mobile devices track them throughout their daily activities, even when that information is shared with companies like Google and Apple.

The 6-3 decision in Chatrie v. United States extends Fourth Amendment protections to data that people hand over to tech companies, meaning police need a warrant to obtain it. Justices Samuel Alito, Amy Coney Barrett and Clarence Thomas dissented.

The Trump administration argued that users did not have an expectation of privacy after voluntarily sharing their location data with companies like Google. ...