The history of Apple iPhone is documented in following link:

https://www.pcmag.com/feature/302519/a-visual-history-of-the-iphone

On the 10th anniversary of the iPhone’s launch, we look back at the phone’s evolution.  One decade ago, Apple finally released the first iPhone. The iPhone’s success certainly stems from its hardware design(s). But Apple is also to be credited with developing the app ecosystem.