It's a movie about a couple or just a woman who is living in a house and strange things begin to happen. There is a man living in the same house as her. When her phone rings, someone breathes into the phone and she kind of knows that the person is in the house, but I can't really remember how she knows it. It was released in 2007 or 2008 (MAYBE 2009, but not later). The name of the movie might be something like Stranger, Intruder .. but I am not sure about it.