I am on my third Saga from Verizon and each one has had this problem. Verizon said they have no tech bulletins on the issue and I just spoke with Samsung support and they don't know of the issue. My phone is new and has no extra aps installed. I've only used ActiveSync with it and created its connection with my Exchange mail server. The phone vibrated so much the other evening that, after putting it on the table before I went to bed, I found it on the floor in the morning. Very annoying. I will try changing the alarm settings to see if that resolves the issue.