A little movie showing what was the prototype of the first iPhone. Despite that it looks like first iphone, approach for interface design here is different.
There were 2 development teams, one led by the godfather of iPod Tony Fadell (he later resigned from Apple and started his own company Nest for the production of household appliances), the second led Scott Forstall (he also resigned from Apple, having been engaged in theater work).
Yes, here you will not see a full review of the interface or a prerelease version of the system, but it is interesting to see first steps to IOS.
Model P1, which is engaged in team Fadell, reminiscent of iPods last years. That only is the famous wheel about which few people remember in modern. We can say that this iPhone with the iPod OS inside. 10 years ago, according to Apple players went crazy in the same way as it is now on the iPhone, so Apple experimented with this option.
Model P2 is quite different, there is nothing beautiful in the menu, but it shows the principle of a future iOS separate paragraphs, there’s no scroll wheel.
Devices under the letter «P» – very early prototypes, they rarely even leave the walls of Apple offices, find them very difficult. They may outwardly resemble production models, but does not have anything to do with them in terms of performance. So here: Home button is in its infancy, all plastic and no glass screens unevenly treated edge.
Sources: Appleinsider, Sonnydickson