since i am not the primary account holder for our att account i had my mom pick up my 3g iphone for me. i thought she would come home with it already activated but insteat i got an iphone sealed in the box. so what do i do from here? do i just take the sim out of my old iphone and im good to go or do i use the new sim in the phone and try to activate it on itunes? sorry for the newbie question guys. i searched and got lost in too many threads.