How to jailbreak and unlock untethered jailbreak for iphone 3gs to iOS 6?

I want to update to iOS 6 but make sure that I could unlock my phone so I can use different sim cards with it. Please help me? I'm new to jailbreaking so please don't use those "hacker" vocab.haha thanks!

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I'm not to sure if there's untethered yet, if you haven't updated yet, don't, you might not be able to jailbreak, do some more research and try to see if any jailbreaks come out.

There isn't an untethered jailbreak ios 6 yet, so you can't don't update until there's one

Here is a jailbreak guide: http://www.jailbreaknation.com/jailbreak-6.0.1-untetheredtethered-iphone-ipod-touch-with-redsn0w if it is an old 3gs it will be untethered

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