Two engineering students in Oregon, allegedly brought thousands of fake iPhones into the US, filed warranty complaints with Apple that they wouldn’t turn on, and then received real smartphones as replacements. The students then sent the genuine phones back to friends and relatives overseas to flip for profit, of which they collected a percentage.

https://www.gizmodo.com.au/2019/04/two-students-charged-with-cheating-apple-out-of-1-2-million-in-wild-iphone-counterfeit-scam/