Update: the video has been removed, but the Galaxy Fold device has been announced.

In November 2018 Samsung unveiled its upcoming foldable smartphone, and according to reports it may officially launch this new product on February 20th (at the Samsung Galaxy S10 unveiling event). Samsung Vietnam accidentally published an ad showing several new technologies, including a foldable smartphone

Samsung first foldable smartphone/tablet device will use two OLED displays - a large 7.3" 1532x2152 foldable AMOLED that folds inside, and a smaller secondary OLED (4.5" 840x1960). Samsung brands the foldalbe display as the Samsung Infinity Flex Display.

Huawei announced an event at MWC 2019 (February 24th), with the slogan "Are you ready to reveal the unprecedented?".

From the looks of that image, and from previous Huawei statements, is is likely that Huawei will unveil its first foldable OLED devices at the event.

LG is set to finally launch its 55" transparent OLED displays at ISE 2019 (Amsterdam, Feb 5-8). LG Business Solutions published this teaser video showing the T-OLED signage displays:

LG has been demonstrating 55" transparent OLED displays for many years, and the latest prototype shown at CES 2019 featured a transparency of 40%.

Samsung Electronics reported its financial results for Q4 2018, with revenues of KRW 59.27 trillion ($53 billion USD), down 10% from Q4 2017. Samsung's operating profit of KRW 10.8 trillion ($9.6 billion) was down 29% from 2017.

Samsung Display reported a decline in rigid smartphone OLED display sales - due to rising competition from LCD panels. Demand for flexible OLEDs was strong. In Q1 2019, OLED display sales will remain weak - but Samsung says that flexible OLED demand will pickup in the second half of 2019.