Nokia today has started rolling out Windows Phone 7.8 OS to all the Lumia handsets running 7.5 version of the OS. The update is now rolling out globally.
The update is said to be taking place over the next few weeks, so if you aren’t seeing the update yet, you might have to be patient for awhile.
The update brings ability to share via Internet and Bluetooth, additional apps, Camera Extras. Bing’s daily wallpaper feature, which has been available to desktop users for awhile now, is also provided in 7.8, changing the background image automatically every day to one of Bing’s image backgrounds.
Nokia says to contact your carrier if you don’t get the update within three weeks.