i used cydia. basically a friend of mine did it for me and he used that pwntool thing.
i have download the yellowsn0w and the boss prefs and i did the steps but it still doesnt work. btw my sim car is not 3g i dont know if it has something to do with that
I don't know the mac's specifications because I didn't do it on my lap top. Anw I have a 2.1 JB iphone now. I downloaded from cythia the yellowsnow thing and it's not working still. I also downloaded the 3g baseband downgrader but it's not working either. What's the problem? I have to unlock my phone in a 2.2.1 version?