Long story short, I'm on my second Galaxy S3 because of some internal problems on the first one. My first S3 would do a double vibrate each time AFTER I get and text when I move the phone. But now with my new S3, It only plays the sound and vibrates WHEN I get a text. When I pick it up (move it in general) a few seconds after receiving a text, it doesn't vibrate at all. I don't know where to look in the settings, because I feel like I've looked everywhere. If this isn't making much sense I can reword it in a more methodical way to clear anything up. It was a great function I had and would really love to have it back.