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Mobile-Phone Privacy Case Draws U.S. Supreme Court Scrutiny

The U.S. Supreme Court agreed to take up a major constitutional test of digital privacy, agreeing to consider whether prosecutors need a warrant to obtain mobile-phone tower records that show someone’s location over days or even months.

Critics say prosecutors obtain massive amounts of data without ever having to meet the “probable cause” standards for a search warrant. The largest telecommunications providers receive tens of thousands of requests for location information a year under the 1986 Stored Communications Act, which doesn’t require a warrant.