Ohio holds today (4-3) that a cell phone search requires a warrant without exigent circumstances. Therefore, it was not subject to a search incident. Today's cell phones are analogous to a computer. State v. Smith, 2009 Ohio 6426, 124 Ohio St. 3d 163, 920 N.E.2d 949 (2009). The Syllabus by the court:

The warrantless search of data within a cell phone seized incident to a lawful arrest is prohibited by the Fourth Amendment when the search is unnecessary for the safety of law-enforcement officers and there are no exigent circumstances.

From the opinion:

B. Characterization of a cell phone

{¶ 14} The question in this case is a novel one. In part, whether the warrantless search of a cell phone passes constitutional muster depends upon how a cell phone is characterized because whether a search is determined to be reasonable is always fact-driven. It appears that neither the United States Supreme Court nor any state supreme court has ruled on the warrantless cell phone search. At present, the two leading cases are those discussed by the majority and dissenting opinions of the court of appeals.

. . .

3. Closed Containers

. . .

{¶ 20} We acknowledge that some federal courts have likened electronic devices to closed containers. E.g. United States v. Chan (N.D.Cal. 1993), 830 F.Supp. 531, 534 (finding that a pager is analogous to a closed container), United States v. Ortiz (C.A.7, 1996), 84 F.3d 977, 984 (following Chan in holding that a pager is a closed container), United States v. David (D.Nev.1991), 756 F.Supp. 1385, 1390 (finding a computer memo book “indistinguishable from any other closed container”). Each of these cases, however, fails to consider the Supreme Court’s definition of “container” in Belton, which implies that the container must actually have a physical object within it. Additionally, the pagers and computer memo books of the early and mid 1990s bear little resemblance to the cell phones of today. Even the more basic models of modern cell phones are capable of storing a wealth of digitized information wholly unlike any physical object found within a closed container. We thus hold that a cell phone is not a closed container for purposes of a Fourth Amendment analysis.

4. Legitimate Expectation of Privacy

{¶ 21} Since cell phones are not closed containers, the question becomes how they should be classified. Given the continuing rapid advancements in cell phone technology, we acknowledge that there are legitimate concerns regarding the effect of allowing warrantless searches of cell phones, especially so-called smart phones, which allow for high-speed Internet access and are capable of storing tremendous amounts of private data.5 While it is apparent from the record that Smith’s cell phone could not be called a smart phone with advanced technological capability, it is clear from the record that Smith’s cell phone had phone, text messaging, and camera capabilities. While the dissent argues that Smith’s phone is merely a “conventional one,” we note that in today’s advanced technological age many “standard” cell phones include a variety of features above and beyond the ability to place phone calls. Indeed, like Smith’s phone, many cell phones give users the ability to send text messages and take pictures. Other modern “standard” cell phones can also store and transfer data and allow users to connect to the Internet. Because basic cell phones in today’s world have a wide variety of possible functions, it would not be helpful to create a rule that requires officers to discern the capabilities of a cell phone before acting accordingly.

5. For detailed discussion of the capabilities of modern cell phones and potential Fourth Amendment concerns, see generally Gershowitz, The iPhone Meets the Fourth Amendment (2008), 56 UCLA L.Rev. 27, and Stillwagon, Note, Bringing an End to Warrantless Cell Phone Searches (2008), 42 Ga.L.Rev. 1165.

{¶ 22} “Modern understandings of the Fourth Amendment recognize that it serves to protect an individual's subjective expectation of privacy if that expectation is reasonable and justifiable.” State v. Buzzard, 112 Ohio St.3d 451, 2007-Ohio-373, 860 N.E.2d 1006, ¶ 14, citing Rakas v. Illinois (1978), 439 U.S. 128, 143, 99 S.Ct. 421, 58 L.Ed.2d 387, and Katz v. United States (1967), 389 U.S. 347, 361, 88 S.Ct. 507, 19 L.Ed.2d 576 (Harlan, J., concurring). Given their unique nature as multifunctional tools, cell phones defy easy categorization. On one hand, they contain digital address books very much akin to traditional address books carried on the person, which are entitled to a lower expectation of privacy in a search incident to an arrest. On the other hand, they have the ability to transmit large amounts of data in various forms, likening them to laptop computers, which are entitled to a higher expectation of privacy.

{¶ 23} But cell phones are neither address books nor laptop computers. They are more intricate and multifunctional than traditional address books, yet they are still, in essence, phones, which makes them distinguishable from laptop computers. Although cell phones cannot be equated with laptop computers, their ability to store large amounts of private data gives their users a reasonable and justifiable expectation of a higher level of privacy in the information they contain. Once the cell phone is in police custody, the state has satisfied its immediate interest in collecting and preserving evidence and can take preventive steps to ensure that the data found on the phone is neither lost nor erased. But because a person has a high expectation of privacy in a cell phone’s contents, police must then obtain a warrant before intruding into the phone’s contents.

Finally, a court recognizing what had become obvious. I posted to Prof. Gershowitz's article nearly two years ago here.

News: Columbus Dispatch