India may be the new ground from where Nokia may hope to launch its volume aspiration, if “Occasional gamer stats” are some indication. Lumia 520 has registered maximum hits from India which is three times more than hits registered from China and twice more than hits registered from Vietnam it seems. Also, even if we have a look at no. of hits registered by Lumia 620 in India, Vietnam and China then you may realise that Lumia 520 is simply close to overtake every other Lumia, in terms of volume very soon in India and globally as well. And, it has been hardly 2 months in its release :).
Though, this is a crude way to interpret things, but having a look at the stats indicates very strong uptake of Lumia 520 and especially in India.