Samsung Display and LG Display are in a tug of war for customers for their OLED offerings and the Samsung side just scored a win - Xiaomi placed an order for 6" rigid AMOLEDs. 1 million are set to be delivered this December, then 2.2 million in January. This comes after the company allegedly tried to source 5.5" flexible OLED panels from LG, but the deal fell through as LG Display's manufacturing plant will start production three months later than expected. Xiaomi already used such a panel for the Mi Note 2 (1080p resolution) and was expected to use a newer generation (QHD resolution)...
Source: http://www.gsmarena.com/upcoming_xiaomi_phones_to_feature_samsung_amoled_screens-news-26232.php