A recent report by iHearst, shows that Nokia is in the top by a wide margin for mobile browsers being used in developing markets, but in developed markets they are far lower on the list. Apple is high on the list, and is catching up in developing markets.
Given the above, it is apparent that Nokia is huge over in developing countries. They could simply have adopted Windows Phone in the developed markets, while letting Symbian remain and develop for it in markets where it is doing well. But that may have ended up being far too expensive, or Microsoft not allow them to customize as much or simply the long term problems with Symbian would cost them in the long term.
What will more likely happen is that the 1st Nokia Windows Phone will be developed and distributed more widely in developed countries where they are weak (or weakening), while slowly easing into the developing nations where they have a high market share. Given that they need to hit the lower price points for developing markets anyway, it indicates that a higher end phone will be launched first.





