well, if going by the provided statistics, ~3million sold/scheduled for delivery to stores for sale worldwide, including on time ongoing production line will of course show greater number. 96% of said 3million has been returned, which works out ~ 120k are still in the wild, of which mostly probably unsuspecting customers, or customers who have balls not to comply, otherwise could be still unregistered/travelling stock etc etc. So they have went trough ~220k devices testings and ~30k battery testings, I can almost sense it will be no brainer that samsung sooner than later will have battery replacement issue ironed out and will push all those supposedly ~3million or more devices as refurbs, and at very successful price rate, its a no brainer business to do so to get some cashflow back in to float. The question is when, and if they will. There is a great chance they will just scrap the whole lot and deal with their commercial insurance claims (providing they had some and if it will cover) and move on too...
I really wish they did rework these 3mln note7 and put them back in to market as Note7-S refurbs, I would be completely amazed to get one that is a dual sim model