The iPhone is a line of smartphones designed and marketed by Apple Inc. The iPhone runs Apple's iOS mobile operating system, originally named "iPhone OS". The first iPhone was released on June 29, 2007; the most recent iPhone, the 6th-generation iPhone 5, was released on September 21, 2012. The user interface is built around the device's multi-touch screen, including a virtual keyboard rather than a physical one. The iPhone has Wi-Fi and cellular connectivity (2G, 3G and 4G (iPhone 5 only)).