I think what Apple did this past quarter, when it comes to reporting the iPhone channel inventory change, was even trickier than you suggest.
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That doesn't mean iPhone channel inventory increased by 1 million (or so) more than it increased by in the previous December quarter (i.e. by around 2.2 million). That means the number of iPhones in channel inventory at the end of this December quarter was 1 million (or so) greater than it was at the end of the previous December quarter.
Durn, I think you’re right. Good eyes!
That said, and even though it makes sense that the channel build was much larger in the most recent December quarter, I think Apple tried to obfuscate how much larger it was by reporting on the channel inventory in a way that was much different than - and less direct than - the way it had, for quite a while, been reporting on channel inventory.
But gosh, how clever it was! Apple elevates verbal handwaving to truly artistic levels. Just as they have invented novel methods to avoid taxes, they seem to constantly come up with new ways to use a factual statement to effectively hide less favorable information.