"When the Phone Rings" initially intrigued with its mysterious title, hinting at a chilling game of cat-and-mouse. While the series does delve into suspense and intrigue, the title ultimately feels misleading. The true mystery doesn't revolve around the initial "Caller 406" incident, but rather the protagonist's elaborate scheme to replace a psychopathic grandson with his own son.

This slow-burn thriller effectively builds tension, though the pacing can feel sluggish at times. The plot felt scattered and unfocused, with too many subplots competing for attention and ultimately undermining the main narrative.

The inclusion of the news anchor (and her love interest) subplot felt unnecessary, detracting from the main narrative. Similarly, the investigation into the dead children, while intended to connect the twins and the true son, seemed to be stretching to tie everything together, resulting in a convoluted and unconvincing narrative.

The reveal of the true culprit fell flat due to an unconvincing performance from the actor. Their delivery lacked the necessary intensity and gravitas, making the moment anticlimactic.

Despite these minor drawbacks, the series boasts strong performances from the lead actors. YYS, in particular, impressively transforms into a character far removed from his real-life persona, showcasing his remarkable acting range. The female lead also delivers a compelling performance, and her dedication to learning sign language adds a layer of authenticity to her character.

Overall:

"When the Phone Rings" is a thought-provoking thriller with a unique premise. While the title and certain plot points could have been more streamlined, the strong performances and intriguing central mystery make it a worthwhile watch for fans of the genre. So, you should watch now, maybe a hyped drama, but worth the watch.

Note: This review reflects your personal opinions and may not align with the general consensus.