Tech Firms Ask Supreme Court to Require Warrants for Phone Searches

More than a dozen high technology companies and the biggest wireless operator in the United States, Verizon Communications Inc., have called on the U.S. Supreme Court to make it harder for government officials to access individuals' sensitive cellphone data. The companies filed a 44-page brief with the court in a high-profile dispute over whether police should have to get a warrant before obtaining data that could reveal a cellphone user's whereabouts.