I have an unlocked iPhone 3GS that I am currently running on TMobile service. It is running the 3.0 firmware and I would like to upgrade it to at least 3.1.2 in order to run certain apps. I bought the phone unlocked and am unfamiliar with the process. Is there any tutorial available that can explain what I need to do to upgrade?
How can I upgrade the firmware on an unlocked iPhone 3GS?
- Thread starter melissa
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