The mobile part (Mobileknox) works on my Samsung Innov8 (which is not listed, therefore SGH D720). However, the desktop part (Desktopknox) refuses to connect to the handset so the synchronization feature doesn't work. There is no advice on the web site how to do. Furthermore, Desktopknox doesn't leave an icon or any program entry, so once it's closed it's gone.