While it likely won't come as much of a surprise to those reading this, it seems that Apple's recently released iPhone sales numbers and AT&T's customer number don't exactly match up, leading those ever so insightful analysts to conclude that many of the phones are being sold with the sole intention of being unlocked. What is somewhat surprising, however, is exactly how many phones that might be. As MacWorld reports, Apple says it sold 3.7 million iPhones in 2007, while AT&T says it signed up about two million or so iPhone customers during the same time period. While those aforementioned analysts point out that Apple's numbers were boosted by 300,000-400,000 sales in Europe, and likely a few sold over the holidays that were yet to be activated, that still leaves over a million iPhones running free out there. If you do the math, that seems to suggest that roughly one in three iPhones sold are being unlocked although, obviously, we're not about to get a confirmation on that number from anyone.