Demand for the iPhone 5 surpassed Apple's immediate supply of the new smartphone, which is scheduled to ship Sept. 21, causing some customers' orders to be pushed back a week, the company said. (Read More: iPhone 5 Shipping Date Slips, Apple Seen Swamped )
AT&T said Monday they also had record iPhone saleswithin the first 24 hours, although the company did not disclose how many they sold.
Apple set a record last year when it sold more than four million of its iPhone 4S during the first three days it was available in stores, but analysts have higher expectations for Apple's iPhone 5, expecting it to break the four million mark during its opening weekend. (Read More: Surge in iPhone 5 Sales Forecast )
Strong pre-orders and strong sales during the first weekend the iPhone 5 goes on sale in stores could translate to a healthy holiday quarter for Apple, as iPhone sales account for about half of the company's revenue.
Apple sold over 26 million iPhones in its third quarter this year and while its fourth quarter ends Sept. 29, just a little over a week after the iPhone 5 goes on sale in stores, analysts are still expecting the tech giant to get a significant boost from the iPhone 5 for their last quarter of the year.
Tavis McCourt, an analyst for Raymond James, said that he expects Apple to sell about 8 million iPhones during the time period leading up to the last day of Apple's 4th quarter.