How many iPhones did Apple sell last quarter?

The most important metric for Apple in the quarter that ended two weeks ago -- likely to account for more than half of the company's revenue for fiscal Q2 2012 -- is the number of iPhones it sold from Jan. 1 to Mar. 31.

We've polled 48 analysts -- evenly divided between professional and independent -- and the indies, as usual, have gone considerably further out on a limb than the pros. The numbers from the two dozen Wall Street analysts we've heard from range from a high of 33.1 million from Pacific Crest's Andy Hargreaves to a low of 26 million, submitted by both Deutsche Bank's Chris Whitmore and Brian Marshall of the ISI Group. The average among the Wall Street analysts is 30.5 million, which would represent a year-over-year unit sales increase of 63.8%.