In deciding two $2014$ cases involving the legality of searching a suspect's cell phone, the Supreme Court ruled that

the cell phone can be searched only if there is sufficient other evidence that it contains information relevant to the crime.

the cell phone can be searched if officers believe it may contain information that will lead to the arrest of other suspects.

the cell phone can be searched as long as the search is approved by a higher police authority, such as a precinct captain or county sheriff.

the cell phone cannot be searched in most circumstances without a warrant.

the cell phone cannot be searched under any circumstances.