According to Korean site ETNews.co.kr, Apple is planning on releasing the iPhone 5 during the 4th week of June.



From MacRumors:

The sourcing of the article is a little suspect, as it appears to be attributing the information to Apple, itself. It also contradicts the "fall" timeframe that has been previously proposed for the next iPhone release. Mobile carriers, however, have been a source of some early release information, as new phones launches must be coordinated. In 2008, Telecom Italia's executive VP of technology revealed the timeframe of the 3G iPhone.

  iPhone 5 to Launch at End of June?