The mic and ground pins are just swapped, so one adaptor will work "both ways". I'm glad that the pins have changed from the N9 - means I can throw away my stupid adaptor and buy any headphone I want (I quite like the Coloud Pops, which are obviously iPhone/Android/Lumia-wired only). No need to either have something stupid dangling from my headphone jack or search out something "Nokia compatible" (actually I think even the new Ashas have fallen in line now, so headsets will soon be impossible to find Old-Nokia-wired).
BB Z10 N900 N9 808 Nexus 7 pops ok noise not detected dead no mic n900 ok ok ok ??? no mic