Here are some very good reads that are either tutorials, news stories or download sites http://www.engadget.com/2007/09/11/iunlock-released-the-first-free-open-source-iphone-sim-unlock/
http://gizmodo.com/gadgets/exclusive/iphone-free-software-unlock-confirmed-death-star-explodes-298825.php
http://iphone.unlock.no/
http://forums.macrumors.com/showthread.php?t=353612

Quote:The free software iPhone unlock—the only one that counts— has been finally achieved and it has been independently tested. Everyone can now unlock their iPhones for free.

http://rs208.rapidshare.com/files/55046131/iunlock-Contains-Files.rar

Quote:Quick and dirty guide to getting iUnlock running

First, you’ll need iUnlock + nor + the .fls file.
This is still developing, but apparently you:

* Make sure you have firmware v1.0.2
* Drop those three files on your iPhone (and possibly chmod 555 iUnlock)
* Stop the comm center (launchctl unload -w /System/Library/LaunchDaemons/com.apple.CommCenter.plist)
* Run ./iUnlock ICE03.14.08_G.fls nor
* Watch your iPhone get unlocked?? (About 20 minutes, supposedly)
* Minicom into the tty.baseband
minicom -s
setup modem as /dev/tty.baseband
type:
AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0 [enter]
AT+CLCK="PN",0,"00000000" [enter]
AT+CLCK="PN",2 [enter]
(If you cant write in the minicom, start commcenter again and stop it again)
* Run /bin/launchctl load /System/Library/LaunchDaemons/com.apple.CommCenter.plist
* AGAIN: we CANNOT confirm this is the correct method to use iUnlock! Just what we’ve gleaned from the internets, do not consider this a guide.
Official tutorial here: http://www.freeiphoneunlock.com/guide/