Page:Riley v. California Opinion.djvu/28

 Opinion of the Court opposition to the arbitrary claims of Great Britain. Then and there the child Independence was born." Id., at 248 (quoted in Boyd v. United States, 116 U. S. 616, 625 (1886)).

Modern cell phones are not just another technological convenience. With all they contain and all they may reveal, they hold for many Americans "the privacies of life," Boyd, supra, at 630. The fact that technology now allows an individual to carry such information in his hand does not make the information any less worthy of the protection for which the Founders fought. Our answer to the question of what police must do before searching a cell phone seized incident to an arrest is accordingly simple — get a warrant.

We reverse the judgment of the California Court of Appeal in No. 13-132 and remand the case for further proceedings not inconsistent with this opinion. We affirm the judgment of the First Circuit in No. 13—212.

It is so ordered.