Very unsettling, especially in the last scenes, it has that classic J-Horror style which is not based on music but mostly on the creepiness of the actual scenes.
The movie started with a very interesting and real ideology, one thing **very common to us as we all have mobile phones** -soon or later someone had to make this concept into a Horror- ==but this turned out to be just repetitive and mostly boring deaths which felt like a chore sitting through.== I felt no attachment to the actors even if Asian movies/shows usually have this as a priority, the song of the curse was scary when heard but it doesnt' have that classicality to it like the _"ki ki ki, ma ma ma"_ from Friday the 13th or Halloween's theme which are now associated with horror, ==may be the director didn't actually want to let this movie be big== and thus a classic, speaking of, I never heard of the director Takashi Miike before so I searched him up and saw that his main genre was Horror-Gore and this movie had nothing to do with that, which made this more or less feel like an **experiment** from him.
All in all "Chakushin Ari" (One Missed Call) is nothing special and the ending was just a total incomprehensible mess, not worth watching.