Based on the Q4 sales estimate of 22 million units and the QoQ shipment growth trends, Apple could sell 60-70 million units in the Americas over the next four quarters.
In Europe, Apple is predicted to move 14 million units in Q4 and 40-50 million over the next four quarters.
Japanese users will buy an estimated 4.4 million iPhone 5 units in the fourth quarter, and 10-13 million in the next year.
As for the APAC region, Q4 sales are estimated at 9.6 million units and 35-45 million units in the next four quarters.
TechThoughts’ methodology seems pretty solid to me and if you’re into sales figures I can’t but recommend you to check out their complete report. It’s good stuff…