I have an unlocked/jailbroke iPhone 3GS with ver. 3.1.3. How do I upgrade

jamies

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Jun 6, 2008
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and still have a hacked phone? Im trying to figure out how I can upgrade to the new firmware so I can use some of the apps only available with version 4.0 or higher. I bought the phone jailbroken and unlocked for T-Mobile but dont know how to do the actual work on it. There are a million sites telling you how to do different things, different ways. Can someone tell me how I can upgrade? Thanks!
BTW, Im not very tech minded so dont know what MC means. Help! From what I just read and watched on Youtube, the latest version, 4.0.2, is un-jailbreakable. Uggh!
 
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