iPhone 1st (iPhone original)

iPhone 2nd (iPhone 3G)

iPhone 3rd (iPhone 3GS)

iPhone 4th (iPhone 4)

iPhone 5th (iPhone 4S)

All iPhones together (iPhone, iPhone 3G, iPhone 3GS, iPhone 4, iPhone 4S)

* The reason for this post is that I just watched a video starring Steve Jobs, where he says that actually they had a prototype of iPad before the iPhone and upon that they decided to put the iPad idea to the shelf and use the multitouch screen in the iPhone project. Not a bad decision and we are many, who are grateful.