if it is on 3.0.1 and u r a windows user u use redsnow v8 to jb if u use ie to download the firmware 3.0 redsnow wont recognize it u have to use firefox then it will work after jb u can get the unlock from cydia that is exactly what i have done allthough i havent checked if the unlock works im still running on 3.0.1 and have no problems and dont c a reason to upgrade yet if it aint broke dont fix it