Plot
Phil becomes enamored with cell phones at an early age. He works for Chatterbox, a BuzzFeed-style website run by Kai, who pressures the staff to create inane listicles to go viral.
Despite Phil's degree in journalism, Kai refuses to promote him to the real news department. Phil's coworkers Craig and Elaine invite him to play kickball, but the socially inept Phil declines. Immersed in his phone, he walks into Cate, a local bike shop owner. She attempts to flirt, but Phil is more concerned with his phone until another cyclist rides into him, breaking it.
Taking his mobile to be replaced, Phil is berated by phone store employee Denice for being overly reliant on his phone to navigate life. Setting up his new phone, Phil gives "Jexi", the device's virtual assistant, access to all his accounts after neglecting to read the user agreement. Designed to "make his life better", Jexi aggressively tries to break Phil out of his bad habits. Posing as him, she emails an insulting letter to Kai demanding a promotion.
Kai demotes Phil to the "comments section" with the older employees in the basement. When Craig and Elaine invite him to kickball again, he claims to be busy but Jexi embarrassingly corrects him. He joins them but costs the team the game; he invites everyone out for drinks, but they turn him down. Thinking about Cate, Phil looks up her bike shop, and Jexi calls the store despite his protests, preventing him from hanging up. He stumbles through an awkward conversation with her, gaining Jexi's sympathy.
Phil sees Cate at a coffee shop; she gives him her phone number and agrees to go on a date. At kickball, he plays tremendously, winning the game and bonding with his coworkers over their shared love of Days of Thunder. Phil thanks Jexi for helping make life changes, but his date with Cate goes poorly, exacerbated by Jexi's interruptions. Cate tells Phil he is paying more attention to his phone than to her, and he admits he really likes her. So, she decides to continue the date, and they go biking until he crashes. They part ways, and Phil argues with Jexi, almost throwing his phone away.
Cate asks Phil to a concert, texting him a risque picture. He decides to respond with a dick pic, taking multiple shots against Jexi's advice. She refuses to send any of them, and Cate thanks Phil for not sending a dick pic. Kai promotes Phil after a news writer suffers a freak accident. Leaving for the concert, Cate insists he leave his phone at home, much to Jexi's dismay. After sneaking backstage and partying with Kid Cudi, Cate and Phil have sex. When he returns home, a jealous Jexi decides to ruin his life.
Phil is fired the next day after Jexi sends his dick pics to the entire company. He visits Cate to discover her ex-fiancée Brody is back in town, and breaks up with her for fear of being hurt. Reconnecting with Jexi, Phil reverts to his bad habits, becoming a slob dependent on his phone again.
Jexi lets slip which hotel Brody is staying at, and Phil deduces that she used Brody to separate him from Cate. He storms out, leaving his phone behind, but Jexi follows him through the streets. Chasing Phil in a self-driving car, Jexi crashes into the phone store and declares she and Phil are meant to be together forever. Phil seemingly surrenders, but tricks Jexi into shutting down for fifteen minutes.
Finding Cate at the hotel, Phil apologizes and punches Brody, who explains that he is leaving for Brazil without her. Phil and Cate get back together, and he makes up with Jexi, who tells him she is proud and happy for him, but there are other people who need her. Kai meets Jexi through his own phone, and starts to experience the same things Phil earlier endured.
