The Apple iPhone 12 family will call to mind the iPhone 4 series
All four 2020 iPhone 12 models will be equipped with an AMOLED display and will be powered by the A14 Bionic chipset. If things go as expected, the iPhone 12 series will be the first smartphones to sport a chip manufactured with the 5nm process. These integrated circuits will have 171.3 million transistors per square mm compared to 96.5 million per square mm on the 7nm A13 Bionic. As a result, the A14 Bionic will shoehorn 15 billion transistors inside compared to the 8.5 billion inside the A13 Bionic. The more transistors found inside a chip, the more powerful and energy-efficient it is.
The same Twitter account also shared some CAD images of the iPhone 12 Pro. Keep in mind that the final design of the 2020 iPhones could be different than what we see in these images.