Moreover, we conclude that such a subjective expectation of privacy of location as signaled by one’s cell phone—even on public roads—is an expectation of privacy that society is now prepared to recognize as objectively reasonable under the Katz “reasonable expectation of privacy” test. See Katz, 389 U.S. at 361 (Harlan, J., concurring) (establishing the two-pronged “reasonable expectation of privacy” test). Therefore, we hold that regardless of Tracey’s location on public roads, the use of his cell site location information emanating from his cell phone in order to track him in real time was a search within the purview of the Fourth Amendment for which probable cause was required. Because probable cause did not support the search in this case, and no warrant based on probable cause authorized the use of Tracey’s real time cell site location information to track him, the evidence obtained as a result of that search was subject to suppression.