Hey guys just joined this forum today...I need some help.

I just got my iPhone 4 32gb but to pay for this phone I sold my 3GS
to my friend who has tmobile so I was like oh well I'll just jailbreak and unlock it for you

thing is i updated to official 4.0 (non jailbroken)..so my question is is there anyway to jailbreak and unlock?

I have a 3GS 32gb

its model MB
the baseband is 05.13.04