The iPhone 6s and 6s Plus have cumulatively achieved 13 million sales just three days after their launch, Apple has announced.
The figure represents a respectable rise from the iPhone 6, which sold 10 million in the same time period in 2014.
From October 9 2015, the new device will be sold in 40 additional countries including Italy, Mexico, Russia, Spain and Taiwan. This will expand to over 130 countries by the end of the year.
“Sales for iPhone 6s and iPhone 6s Plus have been phenomenal, blowing past any previous first-weekend sales results in Apple’s history,” said Tim Cook, Apple’s CEO.
“Customers’ feedback is incredible and they are loving 3D Touch and Live Photos and we can’t wait to bring iPhone 6s and iPhone 6s Plus to customers in even more countries on October 9.”
As previously reported, the new models feature improved cameras and 3D touch, a display technology based on a 'Taptic Engine' that responds according to how hard users press their screens.
Apple noted that sales completed by Saturday, September 26 will be included in its 2015 fourth fiscal quarter results, whereas sales completed after this date will count towards the 2016 Q1 results.
The iPhone 6s launches with iOS 9, a new version of the mobile operating system that Apple claims is more productive and secure.
Both the iPhone 6s and the iPhone 6s Plus will be available in gold, silver, grey and gold. iPhone 6s will be available in the UK for a suggested retail price of £539 for the 16GB model, £619 for the 64GB model and £699 for the 128GB model.