Two mischievous teenagers, played by Gregg Sulkin and Garrett Clayton, find their harmless prank calls taking a terrifying turn in this taut, high-concept thriller. What begins as a night of juvenile fun quickly spirals into a nightmare when a sinister stranger turns the tables, trapping the boys in their own home with a series of increasingly dangerous challenges. The unknown caller demands they follow his every instruction, forcing them to confront the devastating consequences of their actions. Directed by Damien Mace and Alexis Wajsbrot, the film maintains a claustrophobic, real-time tension as the duo races against the clock, their smartphones becoming instruments of psychological torture. Sienna Guillory and Bella Dayne co-star in this nerve-wracking experience that explores the dark side of digital-age anonymity, where a simple prank can escalate into a life-or-death struggle. With its relentless pace and a running time of just 83 minutes, “Don’t Hang Up” delivers a compact, adrenaline-fueled ride that keeps viewers guessing until the very end.