Okay, I bought a (used) 2G iPhone for when I am in Canada to use with my Rogers PPD. I want to install the new firmware but of course I need to unlock it to. I have unlocked it once before using simple mode on pwnage tool. So I have the pwnage tool and I want to choose expert so I can disable the custom icons. My choices are activate the phone and enable baseband update on the general tab. What the heck are these for? Thanks!