hello
i made unlock for 3.12 3g and 3gs via usb using blacksn0w off course
http://rapidshare.com/files/30270043...1.2_nowifi.rar
download , simlpe 2x click on install.bat
reboot your device
thats it !
thanx to geohot
click
THANX if it work
pzl sticky it!
edit
if you used custom firmware juzs install
if you used blackra1n to jailbreak be shure that you have afc2add installed