It wont be until everybody has had symbian Anna released. At the moment half of Australia are still waiting and canada are waiting for Anna to be release. Belle was originally scheduled for last quarter of 2011, but at this stage there is no news.
Consider Anna has only just been released to the rest of the world, I would suggest that it might be a little while off at this stage. I am not sure why everybody seems to think they would get one upgrade and then a few weeks later are expecting another. No phone manufacturer works this way.
Please try reading some of the other Symbian Belle threads before posting new threads on the same topics.