How to Upgrade 3g Jailbreak iPhone 2.2 to 3.0 firmware?

How do I upgrade my jailbroken 2.2.1 iphone 3G to the latest 3.1.2 firmware?

  • Can I just do it via iTunes? Also, do i have to re-jailbreak it afterwards?

  • Answer:

    I'm having to do the same thing. I have been looking on different websites and they say you can upgrade through itunes( you know when u plug your iphone into the computer and itunes pops up and then a message pops up saying do you want to upgrade to the latest firmware) but you WILL have to re-jailbreak it afterwards. I hope this Helps!

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