For those too young to remember (or who may have just missed the news when it happened, since it wasn't mentioned yet in this thread), in 2010 the iPhone 4 was leaked before the release, physically, an employee left it in the bathroom of a bar. Someone found it, tried to return it to Apple, they didn't take it seriously and so this person turned to Gizmodo to make a quick buck: https://www.fastcompany.com/1621516/iphone-4-leak-saga-start...

They haven't had a leak that big ever since, but occasionally things have gotten leaked (specs, components being used, etc) from China who does most of the manufacturing.