Estimates of iPhone 4 sales for Q4 vary widely from analyst to analyst with the consensus number being 11.8 million, according to FORTUNE.
The Q4 iPhone estimates of the analysts we've polled vary wildly, from a low of 10 million units from Morgan Keegan's Tavis McCourt to a high of 13.3 million from Rodman & Renshaw's Ashok Kumar. At the low end, that represents a 35.7% increase from Q4 2009. At the high end, it's more like 80% year over year.
We've used the consensus number, 11.8 million (up 60%)