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 5S with a new flat design using a laser-cut sapphire cover surrounded by a metallic ring; the button is no longer concave, nor does it contain the familiar squircle icon seen on previous models. The phone itself is thick and weighs . The phone uses an aluminum composite frame. The device is available in three color finishes; "space-gray" (replacing black with slate trim on the iPhone 5), white with silver trim, and white with gold trim. The iPhone 5S was the first iPhone to be available in a gold color; this decision was influenced by the fact that gold is seen