I'm new to this, but i'm very computer literate so I need help. I need to unlock my iphone 3gs for my dad, but i'm not sure how to deactivate it first. Which program to use to deactiviate it, then my understanding is, after i do that, I go to the at&T website and request for the unlock code, is that right?
tldr; I need to unlock this iphone 3gs(At&T) where do i start?
I heard you do it by using the IMEI number or something..