At an employee meeting in Cupertino, CEO Tim Cook announced that Apple recently sold the billionth iPhone
(http://www.apple.com/newsroom/2016/07/apple-celebrates-one-billion-iphones.html)
“iPhone has become one of the most important, world-changing and successful products in history. It’s become more than a constant companion. iPhone is truly an essential part of our daily life and enables much of what we do throughout the day,” said Cook.