Wait for New Screen Sizes
It looks like we could see some new screen sizes in 2020.
According to hit-or-miss publication Digitimes, Apple is working on new iPhones that are smaller, and larger, than the current models.
The site claims Apple will launch three OLED iPhones in 2020 with screen sizes measuring 5.42-inches, 6.06 inches and 6.67 inches.
The 2018 iPhones feature 5.8-inch (iPhone XS), 6.5-inch (iPhone XS Max), and a 6.1-inch (iPhone XR) displays. Same goes for the iPhone 11 (6.1-inches), iPhone 11 Pro (5.8-inches), and iPhone 11 Pro Max (6.5-inches).
Korea's ETNews reports that Apple's planning to use thinner OLED displays on the 5.4-inch and 6.7-inch models. It's unclear if the change will lead to thinner designs.
JP Morgan analyst Samik Chatterjee believes Apple will launch at least four new iPhones in 2020. He expects three top-of-the-line iPhone models and a budget model that borrows from the iPhone 8 series. This is likely the "iPhone SE 2."
A more recent note from Chatterjee states that Apple will release four new iPhone models in the fall of 2020 including a 5.4-inch model, two 6.1-inch models, and a 6.7-inch model.
Kuo backs up this information in a new research note. He claims Apple will launch a 5.4-inch iPhone, two 6.1-inch iPhone models, and one 6.7-inch iPhone in the second half of 2020. All of them should come with OLED displays.
A report from Chinese-language Economic Daily News states that Apple will indeed release a new version of the 4.7-inch iPhone 8 in the early part of 2020.
The device will reportedly feature a 4.7-inch and 5.5-inch LCD displays, A13 processor, single-lens rear camera, and 128GB of storage.
iPhone 9/iPhone SE 2 rumors picked up in the latter half of 2019 and it looks like Apple will release the device sometime in the first half of 2020.
So if the current sizes aren't big enough or you're interested in a smaller iPhone, think about waiting for the 2020 crop of iPhones.