https://www.bleepingcomputer.com/news/legal/us-supreme-court-rules-police-need-warrant-to-track-cell-phone-location/

In a 5-4 vote, the Supreme Court of the United States (SCOTUS ) ruled today that law enforcement must obtain a search warrant before obtaining and accessing cell phone location information from mobile carriers and other entities.

SCOTUS justices ruled that a phone's location data, even if stored on a third-party service, deserves the same level of privacy protections under the Fourth Amendment as data stored on the device itself.