Apple is prototyping larger displays for its 20th anniversary iPhone lineup, according to a new leak, with the iPhone 20 Pro reportedly growing to 6.4 inches and the Pro Max expanding to roughly 7 inches when the milestone devices launch in 2027. Both models are said to retain the same screen aspect ratio as the current iPhone 17 Pro lineup despite the larger physical dimensions. Other features rumored for the 20th anniversary lineup include under-display Face ID technology, a custom Apple-designed image sensor, haptic buttons in place of traditional mechanical ones, Apple's next-generation A21 chip, higher-bandwidth memory, and a pure silicon battery. Apple's anniversary iPhone releases have historically introduced significant design changes that later spread across its broader lineup; the iPhone X's 2017 launch for the device's 10th anniversary introduced the notch and Face ID technology that became standard across subsequent iPhone generations. The rumor does not affect Apple's 2026 iPhone lineup, expected to launch next month, which is anticipated to retain the same screen sizes as the current generation.