From a post on Mashable by Zachary Sniderman, about Apple’s first attempt at a game-changing phone, in 1983, even before the introduction of the Macintosh:

“The first iPhone was actually dreamed up in 1983. Forget that silly old touchscreen, this iPhone was a landline with full, all-white handset and a built-in screen controlled with a stylus.

The phone was designed for Apple by Hartmut Esslinger, an influential designer who helped make the Apple IIc computer (Apple’s first “portable” computer) and later founded Frogdesign. The 1983 iPhone certainly fits in with Esslinger’s other designs for Apple. It also foreshadows the touchscreens of both the iPhone and iPad.”

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Esslinger, 2009: