This app requires a Samsung device... Check the status of your Knox Warranty bit. Flashing an unofficial ROM/firmware can trigger Void status. This app is for informational purposes only, Knox status cannot be changed! The app is compatible down to Jelly Bean, although in early versions of Jelly Bean Knox is not present. This is in case you have a KitKat bootloader with Knox but manually downgraded the operating system to Jelly Bean. 0x0 = valid 0x1 = void More information about what Sam