The update also includes an update to the Data Sense data usage monitoring application, which restricts background data when roaming. This prevents an app running in the background from eating you out of house and home once you stray from the price protection of your carrier's territory. In addition, after the update, the 3G and Wi-Fi icons show when data is transmitted.
Another interesting tidbit of information coming from Mendelevich reveals that the top 12 Windows Phone handsets in use are all Nokia Lumia models. Anyone surprised?
Mendelevich says 15% of Windows Phone units have the GDR3 update
Thanks, Anonymous Tipster!
source: @ailon via NokiaPoweruser