IMO, the main reason Nokia want to classify it as a smartphone is so that it boosts the units in the quarterly reports hence they wouldn't need to specify explicitly the success of Lumia series... Its a way to market the devices as well as a safe fall-back for Elop who can cover up the fallings of Lumia if they don't really sell well... After all, I think the Asha series gives around 10% margin just like what Elop expects from WP series phones whereas Symbian and N9 gave him 20-30% margins...So with same margin it would be more difficult to get the real Lumia sales figures...