You can opt to pay for the IMIE to get unlocked by a service or get the seller to call AT&T to get the code. Ideally I would not never buy a GSM phone that was not unlocked otherwise its another $30-50 to get it done.

__________________
My PDA & SmartPhone History: Palm Vx; M505;TungstenT; NX60; iPaq 1910; I700; Treo 600; hx4700; MPx220; hw6515, Treo 700w, XV6700,, Treo 700p, Moto Q Black, Moto Q9h, BlackBerry 8310 & BlackBerry 8820, BlackBerry Bold, BlackBerry Storm 9530.