I got a used iphone 3gs from a friend that upgraded. I was planning to update it to IOS 5.0 and let my kid use it for an ipod touch. The phone does not have a SIM card. I have read that I can not update the IOS or restore it unless I have the orginial SIM card. Does anyone have any advice? I have some old SIM cards from other phones, but they are not the orginial SIM card. Thanks.