The iPhone, a line of smartphones created by Apple, has revolutionized everything about cellular smartphones. Running on the iOS operating system, the iPhone holds the greatest share in the market of smartphones. The iPhone has been rereleased yearly with major upgrades along with a new version of iOS. The iPhone comes with countless apps along with the famous App Store in which users can buy apps from other parties. Basic features of the iPhone include calling, email, text, camera and video, music, GPS, internet, and more.