Here is iPhone's YOY unit sales growth beginning with 2008 Apr-Jun qtr:
166%, 516% (iPhone 3G launch), 88%, 123%, 626% (iPhone 3GS launch), 7%, 100%, and 131%.
Except for one quarter, Apple managed to at least double (or almost double) sales YOY by appropriately setting launch dates throughout the world. The one no-doubling quarter occurred because in 2008 it was the launch quarter and in 2009, it was not. Regardless, did anyone notice it?
Apple doesn't really care about...