Just a quick question which im sure has an easy answer

I am currently using an iphone on 1.02 (with a turbo-sim). The firmware has never been unlocked with anything such as anysim or iUnlock - its pretty much as was when it came out of the box apart from the turbo sim.

What do i need to do in order to get it up and running on 1.1.1 - i'm assuming it should be pretty easy as there is no need to virginize the phone.

Can i just do a straight upgrade. If so, how do i activate the phone in order for me to then use the new jail break app.

Hope someone can help me out.
Thanks