So I really want my iPhone on pre paid and have dicided I will hactivate my iPhone. It is an Original Apple iPhone 8 GB, and I would like to know how to get it on at&t go phone pay as you go. Will I need to unlock it? Or can I just hactivate it? I don't want to jailbraek it or get the cydia or installer app. Just want to use it on the pay as you go go phone from at&t. I have never messed around with my iPhone so could someone help me out? Also a very detailed guide would be appreciated. Thank you so much for your time and knowledge.
EDIT: I belive I just posted this into the wrong forum. Sorry mods. My bad.
Also I'm using Windows XP

EDIT: I belive I just posted this into the wrong forum. Sorry mods. My bad.