Well after some search, I found the update log from Nokia support page it says;
Latest software release for Nokia Lumia 900 is SW 2175.2905.885x.124x0
•New start screen experience with resizable tiles: to change
•Operating system version 7.10.8862.144
•Fix for functionality issues with Live Tiles, such as Live Tiles not updating
•After the update, check out Nokia Collection in Marketplace for new or updated Nokia apps, such as Bluetooth Share
Note: from Nokia Singapore site.