Did you know that there isn't an iPhone 2? After Apple created the first generation iPhone, the one that came after that was all about 3G internet connectivity, so the iPhone 2 was skipped.

Was there an iPhone 3?

The iPhone 3GS (originally styled iPhone 3G S, also known as iPhone 3) is a smartphone that was designed and marketed by Apple Inc. It is the third generation iPhone and the successor to the iPhone 3G. It was unveiled on June 8, 2009 at the WWDC 2009 which took place at the Moscone Center in San Francisco.

Why did iPhone skip 2 and 9?

But often it's for the same reason that Apple skipped 9 - because the company wants to signify a new beginning for a product, just as Microsoft did when it skipped Windows 9 and went straight to Windows 10 from Windows 8 (OK, from Windows 8.1 for the pedants out there).