16-01-2012 13:37 - edited 16-01-2012 13:37
No specific date is known for anywhere in the world. All that is known is that the update will start to roll out in February.
All confirmed details are here:
Guess what, i just get Nokia Suite updated to 3.3.86. By this update it means Belle coming soon as Nokia Suite 3.3.86 update stated this update will support for Belle update. It looks like Nokia preparing Belle update, but exact date still unclear since update may vary depends on country.