Best way to jailbreak and unlock older 3GS
Been trying to figure out the best way to go to unlock an iPhone 3GS.
It is currently on ios 3.1.3 and modem firmware 05.12.01
I would like to UNLOCK it to work on tmobile in the US.
I would like ios 4.0 minimum, best would be latest 4.2.
I want an UNTETHERED jailbreak.
Any suggestions. I have done a lot of googling, and it seems my situation is a little trickier then others, becuase I do have the older modem firmware (it is an older 3GS), but I want to go to the latest ios.
Would love some guidance.
Thanks In Advance.