The 8 most popular Nokia (NYSE:NOK) Lumia devices account for nearly 3/4 of all Windows Phones (NASDAQ:MSFT) in use worldwide, according to usage stats from Windows Phone ad network AdDuplex. The Lumia 920 and 800 are each estimated to account for 14% of WP devices in operation, the Lumia 710 13%, and the Lumia 610 11%. HTC's 8X and 8X are seen accounting for 4% apiece. Kantar Comtech's stats indicate Windows Phone is gradually gaining share in the U.S. and Western Europe, albeit from low levels.