You can also use the program to transfer files like music and photos directly from your desktop PC. The usefulness of SideSync is its ability to control your phone by doing things like typing text messages, making calls, running Android apps and more. You can access most functions over WiFi or with a USB cable connection. The application is overall quite useful, mainly for being able to access your phone's screen and functions on your desktop or laptop PC. SideSync is an official Samsung application designed for use with personal Samsung handsets and tablets powered by Android.