The translated title is "I Just Dropped My Smartphone".
The cafe (Cafe Mizi) in the film is named after Mizi Film, one of the production studios that made the film and shares a logo with the studio.
Jun-yeong posts a photo of a meal that features chamnamul, a food that his father later says reminds him of his son.
Jun-yeong finds Na-mi's old phone in her desk early on.