I have a Samsung Stratussphere. While the phone is laying on a table or desk, sometimes the screen with light up. No call is coming in and no text is being sent or received. The screen just turns on. And last night it started to buzz as if I had it on vibrate, which I don't. It will vibrate once and the screen doesn't light up, so no call coming in, no text coming in and no calendar reminder notification. I turned the phone off and pulled the battery, but it still does this stupid buzzing. Just 3 times today and the other thing just lighting up by itself, still happening couple times a week or more.