Source : http://iphone.fiveforty.net/wiki/index.php/Main_PageThe Dev Team iPhone released a new application to SIM unlock the iPhone, its name: anySIM. Once the iPhone switched on, you simply need to install this application in the iPhone's application folder, then to reboot it and launch anySIM.
Couple of minutes later, the iPhone is ready to be used with all carriers.
[translation by Linathael]