AT&T Lumia 900 receives a new Windows Phone OS update May 9, 2013 by admin Tweet AT&T customers with a Lumia 900 can rejoice at the prospect of a new update. The carrier is pushing some fixes and a small number of actual feature updates for the Windows Phone 7.8 operating system. Read more… Neowin Related Posts:A quick look back at the reveal of the Nokia Lumia…Microsoft announces the Lumia 535 and 535 Dual SimWindows 10 gets its last non-security update with…IT admins rejoice! Microsoft to stop…Xbox Alpha Skip-Ahead channel receives update with…