[Hochum Slochum]

Originally Posted by jarmster **** update to 4.2.1.....thats the last update for the 3g iphone jailbreak with redsnow 0.9.6b1-0.9.6rc19 upgrade to the 6.15.00 ipad baseband unlock with ultrasnow....software downloaded with cydia..(this is installed when you jailbreak it) If you want, you can downgrade the baseband but you really dont have to. (Downgrading to an earlier baseband that is unlockable with ultrasnow) The downgrading was developed for people that used the ipad baseband on their 3gs's and lost thier gps's.(ipads dont have gps but neither does the 3g so the downgrade is really pointless but your choice.... This is a gerenalized method...use google for better instructions I see you said 5.15.04. This is the basband for 4.2.1 so you dont need to do the step...

(Lol didnt know the last update for the 3gs was 4.2.1.)

Yes so download the Redsnow v0.9.6 as i said before, but for the 4.2.1 version basically. If you download Green poison RC5 instead of Redsnow, it will be tethered, and therefore not unlocked. Although you can manually process the unlock, by going into cydia after breakingjail, and searching for
Rocky Racoon 4.2.1.