Apple has today announced that it sold 10 million iPhone 6 and 6 Plus units in the first three days of sales. This includes the 4 million units sold in the first 24 hours of preorder sales. Apple’s newest iPhones have consistently been out of stock across the world, particularly the iPhone 6 Plus which is believed to have faced production issues, limiting the number of available devices for sale.

For comparison, Apple reported 9 million iPhone 5s and 5c sales in the first three days. This means the iPhone 6 and 6 Plus set a new record by over a million units. Apple is unlikely to give any more color regarding iPhone sales performance until its quarterly earnings call in October. As usual, Apple has opted to not share the breakdown of sales between the two new devices.

With limited stock across the board, iPhone momentum is certainly strong. Currently, all iPhone 6 Plus models ship within 3 – 4 weeks on Apple’s Online Store. The iPhone 6 has similar availability issues, although they are less severe. People looking for iPhones sooner should check brick-and-mortar stores, and take advantage of Apple’s online pickup options, as new stock comes in daily.

Apple CEO Tim Cook said the results exceeded Apple’s expectations, in a statement.

“Sales for iPhone 6 and iPhone 6 Plus exceeded our expectations for the launch weekend, and we couldn’t be happier,” said Tim Cook, Apple’s CEO. “We would like to thank all of our customers for making this our best launch ever, shattering all previous sell-through records by a large margin. While our team managed the manufacturing ramp better than ever before, we could have sold many more iPhones with greater supply and we are working hard to fill orders as quickly as possible.”

Apple opens up the iPhone 6 and 6 Plus to more than 20 countries on the 26th September. It is important to note that last year’s opening weekend sales for the iPhone 5s and 5c included China, a key region which inflated total sales. Details on when the iPhone 6 and 6 Plus will be available in China are still unknown as regulatory proceedings are ongoing.