Vivo has been making waves in the smartphone market, and their upcoming X300 series is set to challenge Samsung's flagship Galaxy S26. Building on the success of the X200 lineup, the X300 series is rumored to consist of four models: Vivo X300, X300 Pro Mini, X300 Pro, and X300 Ultra. With sleek designs, powerful performance, impressive cameras, fast charging, and outstanding battery life, the X300 series poses a strong competition to the Galaxy S26. Industry insiders suggest that the X300 and X300 Pro Mini will have flat displays, while the higher-end models may feature quad-curved screens to accommodate the large 200-megapixel periscope camera. As Vivo continues to innovate and push boundaries, Samsung's flagship could face tough competition in 2026.