Disconnected (2007)

Josh recently got a new cell phone and gets lots of messages for other people. Among them is a woman named Crystal who's desperately trying to reach a guy named Sam. But it seems that Sam has disappeared without a word. Josh informs Crystal that she's got the wrong number, but Crystal doesn't understand. Josh feels sorry for her and eventually agrees to help her find Sam whom he's never met. However, little does he know that he is going to experience a series of surreal events that will blur his sense of reality and will put him in a place he's never expected to be.