The GameKlip attaches your Android phone to a real full sized Sony Dualshock3 controller for a full mobile gaming experience. The gaming accessory simply snaps on to your controller providing an easy way to mount your Android phone. In order for the Playstation 3 controller to pair with your Android phone you need to get the Sixaxis Controller App from the Google Play store. The GameKlip comes in both wired play cables ($23) and wireless ($15). Unfortunately, the app only works with Android, no word for the iPhone app yet.
According to the GameKlip website, The Galaxy S3 easily supports the wired connection to a Dualshock 3 controller. So keep in mind, not all Android phones support wired connections! Watch the video below.