- Forum: AAPL Investors
The 70M iPhones apple sold in Q4 last year was, according to cook in the "low teens" of the installed base. Assuming within 1% of 15% is mid teen the highest "low teen" would be 13%. That gives an install base of well above 500M. Since then a lot of buyers of the new 6 series have been switchers, and since there are few switchers the other way I would say it's trending towards 600M.