AdDuplex: Lumia 535 pips Lumia 520 to become most popular WP device

After being the most popular Windows Phone device for almost 3 years, the Lumia 520 has finally been dethroned. According to latest data from market research firm AdDuplex, the Lumia 535 has now claimed the top spot.The Lumia 535 now has a market share of 12.5%, ahead of 11.3% claimed by the Lumia 520.The Lumia 630, 640, and 635 round up the top-5 with the first two claiming 8.3% share each while