Stupid question prolly, I know, but when I pre-order on the 15th and receive the "4" on June 24th, I sync with iTunes and my "4"" is activated/up & running, what happens to my old 3Gs? Will the activation process of the new "4" automatically de-activate my old 3Gs? Will I have to call AT&T to de-activate the 3Gs? Thanks and again, sorry for the noob question.