The Samsung Galaxy Note 4 Duos was announced in 2014, October. Released 2014, October With 5.7 inches, 89.6 cm2 (~74.2% screen-to-body ratio) Super AMOLED, Powered by Qualcomm APQ8084 Snapdragon 805 (28 nm) and running Android 4.4.4 (KitKat), upgradable to 6.0.1 (Marshmallow), the device delivered smooth performance and multitasking capabilities. Its 16 MP, f/2.2, 31mm (standard), 1/2.6", 1.12µm, AF, OIS rear camera captured crisp photos and 4K@30fps, 1080p@30/60fps, stereo sound rec. video, while the Li-Ion 3000 mAh, removable ensured long-lasting usage.