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 5 on September 10, 2013 with the announcement of its successors, the iPhone 5S and the iPhone 5C. The iPhone 5 has the second-shortest lifespan of any iPhone ever produced with only twelve months in production, breaking with Apple's standard practice of selling an existing iPhone model at a reduced price upon the release of a new model. This was broken by the iPhone X which only had ten-months in production from November 2017 to September 2018. It was replaced as a midrange and then an entry-level device by the iPhone 5C; the 5C internal hardware specifications are almost identical to