"The Call" advertised itself as a sci-fi film, but I felt like it was more of a psychological thriller. Don't get me wrong, the suspense was good, but I was hoping for more exploration of the time travel mechanics. How does the phone work? Are there any limitations? The film left me with more questions than answers. This movie had some serious logic flaws when it came to the time travel aspect. Things just didn't add up for me. If Seo-yeon could change the past, wouldn't that create a whole new timeline? The film didn't explain the rules of its own universe clearly enough. It left me feeling confused and frustrated.