Some Galaxy S4 didn’t come with Knox security software when it was launched. This delay happened because Samsung chose to do further testing internally and also with the operators. Samsung confirmed the delay, and clarified that although users receive Galaxy S4 Knox installed applications, but for the activation of this feature depends on the decision of the operator (B2B contracts).
Knox is a similar service to Blackberry Balance on BB10, which gives access for users to use personal and corporate accounts on the same device and can easily switch between the two accounts through password. BlackBerry may be proud because its platform has been recognized safe by many, but Samsung continues to move in the same direction. The proof is United States Defense Department begins using Galaxy devices, previously only BlackBerry devices used by the department.