I need help getting a 3G iPhone to work with T-mobile!?

DontEatChalk

New member
Okay after reading a lot of text (both old and new) I'm not completely sure what I should be getting my software up to, 3.1.2. or 4.0.2.? Also, I just wanted to make sure: I can jailbreak the iPhone after I update it to whatever software thats compatible with T-mobile right? If so, what's the best jailbreak to use? Thanks in advance
okay, one more thing:
can you downgrade a phone from 4.0.2 to 3.1.2.? because i have a phone that's at 4.0.2. x_O
 
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