IPhone (1st generation) $499, the original launch price of the 4 GB model. Apple released an SDK on March 6, 2008, allowing developers to create the apps that would be available starting in iPhone OS version 2.0, a free upgrade for iPhone users. On June 9, Apple announced the iPhone 3G, which began shipping July 11. The original iPhone was discontinued 4 days later; total sales volume came to 6,124,000 units. During release, the iPhone was marketed as running "OS X". The name of the operating system was revealed as iPhone OS with the release of the iPhone SDK. The original iPhone supported
IPhone (1st generation) added these features. iPhone OS 2 was released on July 11, 2008, around the same time as the release of the iPhone 3G, and introduced third-party applications, Microsoft Exchange support, push e-mail, and other enhancements. iPhone OS 3 was released on June 17, 2009, and introduced copy and paste functionality, Spotlight search for the home screen, and new features for the YouTube app. iPhone OS 3 was available for the original iPhone as well as the iPhone 3G. However, not all features of iPhone OS 3 were supported on the original iPhone. iPhone OS 3.1.3 was the last version of