If I buy from eBay iphone 3g can i buy an at&t Go Phone SIM?By Community Writer | Community.Drprem.com / November 17, 2011 Can anyone tell me that if I will buy an iphone 3g from eBay so can I buy an at&t Go Phone SIM to put in it and use a prepaid monthly plan? Have anyone done this earlier and it worked or not? Please reply as soon as possible. Thanks. Today's Top Articles: