times on a hard surface and then incurring further stress on the device". Sales Apple Inc. announced, within 24 hours of availability, over 4 million pre-orders of the iPhone 6 and 6 Plus were made, exceeding the supply available—an Apple record. 10 million iPhone 6 and iPhone 6 Plus devices were sold in the first three days, marking another Apple record. The iPhone 6S & 6S Plus were introduced in September 2015 selling 13 million units which set the record for sales in the first three days from last years release. Three months after its release, the iPhone 6 generated 71.5 million unit sales. As of June 2017, the iPhone 6 and 6 Plus have sold 222.4 million units worldwide, making them the most popular iPhone models and the best-selling smartphones of all time. See also List of iOS and iPadOS devices History of iPhone Comparison of smartphones List of best-selling mobile phones Timeline of iPhone models Notes References Computer-related introductions in 2014 Mechanical failure Mobile phones introduced in 2014 IOS Products and services discontinued in 2019 Discontinued flagship smartphones