1st iPhone = 1
iPhone 3G = 2
iPhone 3GS = 3 (iOS3)
iPhone 4 = 4 (iOS4)
iPhone 4S = 5 ?? (iOS5)
iPhone 5 = 6 (Also with iOS6)

是有甚麼原因OR內幕消息呢?
OR just Tim want to call this iPhone to be "5"............................^_^|||