https://www.cnet.com/news/2018-iphone-three-cameras-cheaper-than-iphone-x/

This render shows an iPhone with three vertically stacked cameras on the back.

Either way, Apple isn't the first to go this triple-camera route. Huawei introduced a phone with three rear cameras in March, the Huawei P20 Pro. It features one lens that does the heavy lifting of taking most shots, a second telephoto lens that also assists with portrait shots and a monochrome lens to add additional detail.