I got a prepaid Orange BigTalk SIM card for Orange IL. I've had my first generation iPhone in Israel here with me for the past couple weeks. I have only been able to get a GPRS connection. What can I do to get EDGE on it? Is it the network (GSM900) or the SIM card (maybe it only supports GPRS?) Please let me know. I have plenty of credit on my sim card (around ₪110).