According to Tech Radar, while most flagship phones are happy with 4GB of RAM, Samsung is about to stick GN into the next Galaxy C9.
Benchmark figures have tipped up with the 6GB figure listed and the C9 is not a high-end handset. In fact, normally few people would pay much interest to it. The rest of the C9 specs, include a 5.7-inch 1080p screen, a Snapdragon 652 processor and 16MP cameras on both the front and back. All pretty much upper mid-range stuff.
The belief is that it probably will not be seen in the West anyway and it is not clear why anyone would want that much memory in the first place.
It does mean that Samsung phone will certainly be jacking more memory into Samsung Galaxy S8 because who wants their flagship eclipsed by the mid-range.