Have someone that has Cingular and has been with them for more than 90 days put their sim card in the phone, call up Cingular and tell them they are traveling out of the country and were wanting to use pre-paid sim cards over there. They will give you the unlock code for it. If it doesn't work the first time, call and do it again. You will eventually get someone that will do it for you. If you search you can find a phone number that will go around Customer Support right to tech support and they will almost always do it.