A “newer” Samsung is not an iPhone, and we don’t know which model Samsung it was or if it shipped with KNOX (though my guess is it wouldn’t have needed escalation if it didn’t have KNOX).

“According to Washington Post reporting, the FBI used Cellebrite software to break into the device of Thomas Matthew Crooks at the bureau’s lab in Quantico, Va. That followed an initial stop at the nearby Pittsburgh office in which attempts crack Crooks’ newer Samsung model were unsuccessful, according to Bloomberg, noting that the Cellebrite software was “unreleased.”” https://fedscoop.com/israeli-firm-behind-tech-that-reportedly-cracked-trump-shooters-phone-wants-more-fed-business/