Nine years ago is when the first iphone hit the market. Last Wednesday, Apple sold its billionth iPhone according to CNN Money.

To this day, the iPhone continues to cover mnajority of Apple’s revenue. However, Apple sold 40.4M iPhones in the quarter that ended in June. that’s 8M less than last quarter. This is the second quarter where iPhones are declining in sales.

Upgrading to the iPhone 6S took longer than usual according to Apple CEO Tim Cook.