Android 4 and above devices with NFC (Near Field Communication) chips have a feature called Android Beam, which allows users to transfer contacts, photos and other small pieces of data just by tapping the backs of their devices together. However, Samsung’s S Beam feature improves on standard Android Beam by sending the data over Wi-Fi Direct rather than Bluetooth, which makes file transfers as much as 10 times faster.
Alternative: While not quite as simple to use as S Beam, a few third-party utilities exist that will let you use Wi-Fi Direct to send files from one device to another. We tried a number of these and none work automatically when you tap the backs of devices together, but they will work from the Android Share menu, provided both parties are running the same app. Two apps we tried successfully were j4velin’s WiFi Direct and Billy Lam’s Send!.