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 X September 12 press event, the first public event held at the Steve Jobs Theater on the company's new Apple Park campus in Cupertino, California. The iPhone X was unveiled during that keynote. Its US$999 starting price is the most expensive iPhone launch price. The price is even higher in international markets due to currency fluctuations, import fees and sales taxes. An unlocked version of the phone was made available for purchase in the United States on December 5, 2017. In April 2018, the Federal Communications Commission divulged images of an unreleased gold-colored iPhone X model. As opposed to the space