Apple’s most popular phones have larger sized screens

Is there a correlation between Apple's most popular iPhone models and the size of the screen on the varying handsets? According to Consumer Intelligence Research Partners, larger iPhone screens lead to more popularity for models like the 5.5-inch Apple iPhone 6s Plus, and the Apple iPhone 7 Plus. Both account for a combination of 53 million units actively used in the U.S. The Apple iPhone 6s and iPhone 6s Plus are responsible for 39 million iPhone units actively in use. With 48 million units out there, the Apple iPhone 7 and iPhone 7 Plus make up 34% of all smartphones in use stateside. CIRP says that Apple's domestic installment base carried 141 million units this quarter, up 13.7% from the 124 million counted in last year's quarter.
The original generation iPhone model launched in 2007 with a 3.5-inch display, and that wouldn't change until the screen rose to 4-inches on the Apple iPhone 5. The iPhone 6 and iPhone 6 Plus took the device to 4.7-inches and 5.5-inches respectively, which is where the measurements currently lie.
In 2010, Apple CEO Steve Jobs said that no one would want to buy a phone with a big screen, but he quickly was proven wrong thanks to phones like the Motorola DROID X and the Samsung Galaxy Note phablet. At 5.3-inches, the Note was the first smartphone to carry a screen with a size in excess of 5-inches. Very rarely these days do you see a handset with a screen size under 5-inches. The most recent model that we can think of is the BlackBerry KEYone, which needs room for the physical QWERTY keyboard that is laid out under the 4.5-inch glass.
If CIRP is right, and larger screened iPhone models are the most popular, there is no reason not to expect demand to continue to pop for Apple during the 2017 shopping season as newer and possibly larger iPhone displays are officially introduced.
source: CIRP