Sure they do. Samsung gives numbers when they pass major milestones.
Mar 2012 - Samsung announces 5 million Notes sold
Aug 2012 - Samsung announces 10 million Notes sold
Nov 2012 - Samsung announces 5 milllion Note 2s sold
A few people constantly make themselves look foolish, by claiming every time such a milestone is announced, that "Oh all those units are sitting on shelves". Uh, no. Stores don't continue to buy millions of units over a year's time, if they're not selling them through to end users.
Those posters are also usually confused, and don't get that sales and shipments are the same thing in these cases. Both Apple and Samsung include sales to retailers. Apple counts sales when shipped to the retailer. Samsung counts sales when they are delivered to the retailer.
In both cases, the number given is not end user sales. That number only becomes more apparent after the next sales announcement, when a slowdown is seen or not.
Edited by KDarling - 2/25/13 at 8:43pm