The iPhone is a mobile phone with Wi-Fi made by Apple Inc. It does many different things like a computer but is small enough to fit in someone's hand. It is a mobile smartphone; it makes calls without wires. It can access the Internet as well. Like an iPod, it plays music and videos that have been put on it from a big computer, which is called syncing. It also has a calendar and camera, and can send text messages. People use the iPhone by touching the screen with a finger or two. This is done by tapping, dragging, and even typing on a keyboard shown on the screen. The iPhone 3GS and later models can run iOS 5.1.1, and they can also run iOS 6, but only iPhone 4 and later can run iOS 7.