It’s only a while ago that AdDuplex stats reflected that the low-end Nokia Lumia 520 held 4.4% of the global Windows Phone market. Being the entry level Windows Phone 8 device, the Lumia 520 is expected to have the lion-share of the Windows Phone market and latest indication from AdDuplex suggests that the device well on its way to achieving this.

Yesterday, Adduplex’s Alan Mendelevich sent out a tweet to say that the Nokia Lumia 520 has doubled its global market share in the last month. This is quite incredible if you consider that the device is still relatively expensive compare to the Lumia 620. That’s obviously due to the fact that the Lumia 520 is newer and should hit a lower price-point with time. However, we’ve seen Nokia Lumia 521 variant of the 520 sell out in the states through HSN, Walmart and through T-Mobile’s monthly pre-paid plans.

Mendelevich also suggested that for first time the number of Windows Phone 8 models in use has overtaken the number of Windows Phone 7 devices. Also, Lumia models are apparently monopolizing the list of top selling Windows Phone models holding more than 80% of the market share. he also hinted that Verizon has taken over the top spot in Windows Phone 8 sales in the US.

What do you make of this? Do you think with the Lumia 520, Windows is finally in a position to challenge Android and its army of cheap devices?