A recent Supreme Court ruling in Chatrie v. United States expanded Fourth Amendment protections for smartphone users by holding that law enforcement generally must obtain a warrant before accessing historical location data collected by phones.
The Court ruled that even a short period of location data can reveal highly personal details about an individual’s movements and activities, giving people a reasonable expectation of privacy in that information.
The decision has major implications for technology companies, app developers, telecommunications providers, and organizations that collect or store location data. It also signals that future privacy protections could extend to other sensitive information generated by smartphones.
As smartphones become increasingly integrated into daily life, the ruling reinforces the principle that constitutional privacy rights must evolve alongside technology.
Source: This post summarizes information from Wiley Rein LLP’s article, “Every Phone Leaves a Trail: Supreme Court Holds Location Data Is Protected by the Fourth Amendment,” July 2, 2026. Available at: https://www.wiley.law/alert-Every-Phone-Leaves-a-Trail-Supreme-Court-Holds-Location-Data-Is-Protected-by-the-Fourth-Amendment
