Whats the name of this movie??!

Whats the name of this movie??

its about college students who are in college and one of their friends dissapears and i believe is pronounced dead, and later one of her friends are on her email and receives an email from him...then there is a picture they print out of his face and can see other dead people around him...it came out around 2004 to 2005 i believe...its not cry wolf so dont say that...plz help me i really want to buy that movie!

2 weeks ago
now since i know the name of the movie is Pulse how scary is it on a rating of 1 being not scary to 10 extremely scary and is it worth buying and watching?

Sounds like "Pulse"