I really enjoyed this film; it’s a "small" movie that's truly excellent, demonstrating that a large budget isn't necessary to create suspense and hold viewers captivated. The premise is quite simple – essentially just one room, a man, and a telephone – yet it delivers an intense narrative with a surprising turn. While the tone is dark, there are also some lighter moments providing a welcome break. Jakob Cedergren gives a wonderful performance; I can confirm he’s a genuinely pleasant person too, having met him at the Zurich Film Festival during a question-and-answer session. If you get the opportunity, definitely watch it!

Source on TMDB