Can an Iphone be unlocked AND jailbroken? URGENT

So, I unlocked my Iphone 4, for T-Mobile before they supported iPhones, now I want to jailbreak it, can you? Will it break my phone? Any specific verzions or programs to use?

Yes you can

So, I unlocked my Iphone 4, for T-Mobile before they supported iPhones, now I want to jailbreak it, can you?
--- yes

Will it break my phone?
--- if you don't follow directions, yes

Any specific verzions or programs to use?
--- nope… Google search… Read English… Follow directions… Enjoy

Yes, you can. It would void any warranty on your phone and you are on your own for tech support.

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