When is Apple going to release the next iphone version? Will it be in 2013 or later?

When is Apple going to put out it's next edition of the iphone (iphone 6, for lack of knowing what it may be called)?

I have heard Iphone 5S will be realeased in the mid of 2013

Third semester of this year.

From one article I have read, the next release of the Iphone will be in March 2013. Here is an article that discusses this:

http://www.ibtimes.co.uk/articles/423547/20130113/apple-iphone-ipad-mini-launch-rumour-march.htm