Smart Switch. It's a Samsung App that's pre-loaded on newer Sammy phones. If you're transferring from another phone or PC or a non-Samsung phone, you can just download it form the Playstore (Android), iTunes (iOS) or Samsung's site (PC/Mac) and done! Open the app, follow the instructions on the screen (for transferring via cable or WiFi) and you're set! Pictures, contacts, data, documents, even apps (just not app data if you're on Android), messages (some phones restrict access to MMS so you can only back up SMS).