What's this movie called? It's a horror film.?

Basically, you get a call and when it rings it has a lullaby-weird haunted song on it. From the point you receive the call you have a certain amount of time to live. In the end some people find out where the calls are coming from - a abandoned hospital that was burned down a while ago. Oh, and I remember a red marble coming out of the person's mouth of whom was dieing at the moment. Thank you.