AT&T is pushing out a Windows Phone update for the Nokia Lumia 900. We saw the Lumia 900 make the jump to Windows Phone 7.8 back in January and the latest update takes the OS version from 8858 to 8862 (2175.2307.8862.13100 to be exact).
According to NokiaCare, the update adds theme colors, lock screen improvements, fixes Live Tile issues and makes updated Nokia apps available. This is likely similar to the update Microsoft pushed out back in March to fix the issues we experienced with the original 7.8 update.
The update is cumulative and includes four seperate updates. We're in the process of updating our Lumia 900 and let you know more on this update shortly.
Thanks, everyone, for the tip!