This movie is horrible. Absolutely horrible. I like the original, but this remake sucked balls. It's about a group of college students who start hearing a strange ringtone on their cellphones, one they've never heard before, and then (since they don't answer the peon...what if they did? What would happen then? We'll never know) they have a voicemail, and when they listen to it, they hear the sounds of their own deaths. Then they die. And there's a ghost killing people, a vengeful little ghost, and we don't know why (and in this movie, we don't care). One of the students investigates to find out what's going on, the world's dumbest cop helps her, blah blah blah, is it over yet?
Watch the original instead.