With the iPhone 7 and iPhone 7 Plus, Apple marked the end of an era by removing the headphone jack. They were Apple's first pair of iPhones to come without the 3.5mm port and instead required headphones to be connected through the Lightning slot. Apple also introduced its popular AirPods wireless earbuds that year.
Apple may have not been the first company to release a headphone jack-less smartphone, but it quickly became the industry standard following the iPhone 7's launch. AirPods have skyrocketed in popularity since then too, with analysts at Wedbush Securities predicting that Apple could sell between 85 and 90 million AirPods in 2020.
The iPhone 7 Plus was also the first iPhone to include a dual camera and Portrait Mode, the feature that makes the subject of an image look sharp against a slightly blurred background. The iPhone 7 and 7 Plus were also Apple's first smartphones to come with water resistance.