According to a leaked image on Weibo, Vivo's upcoming XPlay5 phone has a dual-edge display, similar to the flexible OLED displays used in Samsung's Edge phones (such as the recently announced Galaxy S7 Edge).
According to the Chinese press, Xiaomi and Huawei also aim to release new phones soon with similar edge displays. This is an interesting development as usually Samsung Display only ships the newest displays to Samsung Electronics - and in any case SDC's flexible OLED production is in rather short supply as it is.
Note that the Blackberry Priv, announced in October 2015, also has a flexible edge OLED display. Blackberry's Android device is not shipping yet, but it has been on display at the MWC tradeshow.
Samsung Display is expanding its customer base following the slump in Samsung's own mobile phone business.