iPhone 4 Pre-orders Top 600,000

Apple and its partners took in over 600,000 iPhone 4 pre-orders on June 15, making for the largest number of pre-orders the company has processed in a single day.

“It was the largest number of pre-orders Apple has ever taken in a single day and was far higher than we anticipated, resulting in many order and approval system malfunctions,” Apple said in a statement. “Many customers were turned away or abandoned the process in frustration. We apologize to everyone who encountered difficulties, and hope that they will try again or visit an Apple or carrier store once the iPhone 4 is in stock.”

Many potential iPhone 4 buyers deal with frustration on the 15th, the first day of iPhone 4 pre-order availability, thanks to overworked servers that couldn’t keep up with the demand.

Apple is currently showing July 2 instead of June 24 as the ship date for new iPhone 4 pre-orders, and AT&T has temporarily stopped accepting new pre-orders through its Web site.

The iPhone 4 is set for a June 24 release date, and most customers that managed to successfully complete the pre-order process on the 15th will receive their new combination iPod and smartphone on launch day.