Apple’s iOS 14 developer beta 3 contains evidence that a 5.4-inch iPhone 12 is in the development. The latest iOS 14 beta version brings the Display Zoom feature along with a new, smaller resolution of 960 x 2,079 pixels that are meant for zooming the content on the iPhone X and newer 5.8-inch iPhone models but fits accurately on a 5.4-inch display (reports 9to5Mac). This gives reason to speculate that the smaller iPhone 12 may come with 5.4-inch display size.
The new feature essentially changes the entire system interface to the size of what's there on a smaller iPhone model to offer some magnification. It wasn't available for the iPhone X, iPhone XS, and the iPhone 11 Pro, but was a part of the iPhone XS Max and iPhone 11 Pro Max up until now. Apart from this, Apple analyst Ming-Chi Kuo predicted in an investor note that the 2020 iPhone 12 lineup would include the 5.4-inch model with an OLED display and 5G support. A report by Japan's Macotakara citing Apple suppliers also claimed in January the 5.4-inch iPhone 12 would come with an iPhone 8-like design and include TrueDepth Camera hardware for Face ID. As for the other specs, the iPhone 12 is expected to have a 5nm A14 Chipset with up to 6GB of RAM. The display of the device will support a 120 Hz refresh rate (no doubt, it will be an exciting thing to see the 120Hz refresh rate on the Apple iPhone). There will be a quad-camera setup on the back panel.
On the other hand, a tipster (who goes by the name ihacktu) suggests that the Cupertino tech giant will announce a new iPhone 12 lineup, as well as new Apple Watch and iPad models, at an online-only event on Sept. 8.