Apple launched their iPhone XS、XS Max、XR in 2018 which received lukewarm response from users and the sales from these new models have been discouraging until now.
Most people have switched their focus in anticipation of the new model in 2019. Lots of random sources seem to think some upcoming iteration of the iPhone X will feature three rear-facing cameras, either this year or next.
It isn’t clear what the third sensor would do exactly for Apple. Huawei incorporated three cameras into its P20 Pro— a 40-megapixel main camera, a 20-megapixel monochrome camera, and an 8-megapixel telephoto camera. Most outlets seem to think Apple’s third lens would be used for an enhanced zoom.