Samsung announced its KNOX security for its Galaxy smartphones back in February, and now Samsung is testing out its KNOX security for the European version of the Samsung Galaxy S4.
When the Samsung Galaxy S4 was launched, Samsung did not have the KNOx security ready for the handset, and they are now apparently testing it out for the handset in Europe.
There are no details as yet on when the Samsung KNOX security will be available for the Samsung Galaxy S4 in Europe, it looks like the Samsung Galaxy Note 3 will come with the software at launch.
Source Sammobile