erm... I'm confused here...

I using a Maxis iphone 3GS set. So it is an officially unlocked phone correct.

Now, I just want to jailbreak it. I understand 3.1.3 cannot unlock, but jailbreaking alone doesn't unlock right? So should be able to still use my Maxis SIM card right?

Please advise. I read that you can jailbreak without unlocking. SO wondering if that is the case of Maxis set as well. My iphone 3GS is 3.1.3 MC model with the latest baseband.

that sucks
I so want to install Doom Classic... unavailable to Malaysia appstore