Let’s take a look at Apple’s Quarterly financial Reports on the iPhone, straight out of their press releases archive (I’ve put numbers in bold):

Apple Financial Earnings Q3 2007June 2007: Apple Reports Third Quarter Results

iPhone is off to a great start—we hope to sell our one-millionth iPhone by the end of its first full quarter of sales—and our new product pipeline is very strong.

October 2007: Apple Reports Fourth Quarter Results

Quarterly iPhone™ sales were 1,119,000, bringing cumulative fiscal 2007 sales to 1,389,000.

January 2008: Apple Reports First Quarter Results

Quarterly iPhone™ sales were 2,315,000.

April 2008: Apple Reports Record Second Quarter Results

Quarterly iPhone™ sales were 1,703,000.

July 2008: Apple Reports Record Third Quarter Results

Quarterly iPhone™ units sold were 717,000 compared to 270,000 in the year-ago-quarter.

October 2008: Apple Reports Fourth Quarter Results

Quarterly iPhone units sold were 6,892,000 compared to 1,119,000 in the year-ago-quarter.

Apple Financial Earnings Q1 2009January 2009: Apple Reports First Quarter Results

Quarterly iPhone units sold were 4,363,000, representing 88 percent unit growth over the year-ago quarter.

Let’s add those thousands: 1119+2315+1703+717+6892+4363

This brings us to a grand total of 17.109 millions of iPhones sold so far (at the end of January 2009) by Apple since its launch on 29 June, 2007.

Note: feel free to use this data analisys but please credit and link back to the Stories of Apple website.