Smasung's security feature Knox has continued to gather users and has even reached about 4 million users in just two years since its launching.
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AT&T and Verizon have rolled out new updates for their Samsung Galaxy S4, adding the Samsung Knox security suite, as well as the option to move apps to the SD card, among other features.
Sprint has started rolling out a new update for the Samsung Galaxy S4, bringing Knox support and allowing users to move apps to the SD card, among other things.
The Android security feature by Samsung will not be released before July. With the launch of Samsung Galaxy S4, Samsung was planning to take on BlackBerry's main strength that makes it the favorite among business executives.