https://www.vice.com/en_us/article/ywyp8x/some-galaxy-fold-pre-orders-may-be-cancelled-if-it-doesnt-ship-by-may-31-samsung-says

Samsung says that pre-orders of its new foldable smartphone, the Galaxy Fold, will be cancelled if it doesn’t ship by May 31 and customers don’t get in touch.

Samsung sent emails to customers who pre-ordered the Galaxy Fold on Tuesday, Reuters reported, letting them know that it’s still working to improve the phone but declined to clarify a shipping date. The Fold was supposed to launch in late April, but review units of the phone confirmed every potential folding phone owner’s worst nightmare: they broke pretty much right away.