Apple says it has sold over 1.7 million of its iPhone 4 through Saturday, June 26, just three days after its launch on June 24. CEO Steve Jobs says it is the most successful product launch in the company’s history.

“Even so, we apologize to those customers who were turned away because we did not have enough supply,” he said.

The iPhone 4 is available in the US for a suggested retail price of US$199 for the 16GB model and $299 for the 32GB model in both Apple and AT&T’s retail and online stores, Best Buy, Radio Shack and Wal-Mart stores. iPhone 4 is also available in the UK, France, Germany and Japan and will be available in an additional 18 countries by the end of July — Australia, Austria, Belgium, Canada, Denmark, Finland, Hong Kong, Ireland, Italy, Luxembourg, Netherlands, Norway, New Zealand, Singapore, South Korea, Spain, Sweden and Switzerland.