Apple announced Monday that since its launch of the iPhone 4 on Thursday, June 24, the company has sold 1.7 million units.

Apple CEO Steve Jobs called the iPhone 4 “the most successful product launch in Apple’s history.” He also apologized to customers who have been turned away because Apple has a supply shortage.

The company previously reported iPhone 4 pre-orders of 600,000; the pre-orders apparently overwhelmed Apple and AT&T’s online ordering systems, which repeatedly went unavailable as customers tried to place their orders.

The iPhone 4 was introduced during Jobs’ keynote presentation at Apple’s annual Worldwide Developer Conference (WWDC) in San Francisco in early June. The first device to ship from Apple running the new iOS 4 operating system, the iPhone 4 sports a 5-megapixel camera and LED flash, Apple’s A4 processor – which also powers the iPad – a three-axis gyroscope for more realistic game control, and up to 40 percent more talk time thanks to more battery life and improved power consumption.

Apple’s launch of the iPhone 4 hasn’t gone without problems, however. Some users are reporting a discoloration when they first remove the iPhone from the box, and some users are also able to reduce signal quality when they hold the phone a certain way with their left hand. Apple has not acknowledged an issue with the screens, but as to the antenna problems, they’ve directed customers to either hold the phone a different way or use a case.