Source : http://conceitedsoftware.com/iphone/site/anysim11.htmlanySIM, the free application to SIM unlock the iPhone is now available in version 1.1.
However, this version works only on virgin firmware 1.0.2 or 1.1.1-based iPhones. They are working on a "re-virginizer". So to make it cleat: DO NOT USE any SIM 1.1 IF YOU HAVE ALREADY UNLOCKED WITH ANYSIM 1.0.
Additional information hereafter: http://conceitedsoftware.com/iphone/site/anysim11.html
[translation by Linathael]