That amount of RAM would be a first for an Android device, while the QHD display would be on a par with the LG G3. Though because it's slightly bigger than the G3, the ppi will be a tad lower – 515ppi, compared to 538ppi on the G3.
Inside, we're looking at two different processors, which suggests different models will be available for varying markets.
Samsung has launched different versions of previous handsets like the Galaxy S5 in different markets, so this is nothing new.
Also on board is a 16-megapixel camera with optical image stabilisation and a dual-LED flash.
Storage-wise, we're looking at 16GB, 32GB or 64GB options, though they can each be beefed up with a microSD card up to 128GB.
Unsurprisingly, the Note 4 is pegged to run Android KitKat, which is the latest version of Google's OS.