I lost my original AT&T sim card and now want to activate my (now re-virginized) iPhone to AT&T through iTunes. I heard that the SIM cards have the IMEI of the respective phone written to them, and iTunes won't activate it unless it matches the IMEI of the iPhone. So purchasing one of these second hand, unused iPhone Sim Cards from iFixIt (http://www.ifixit.com/iPhone-Parts/i...Card/IF105-014) would probably not work since they only have the IMEI of their original iPhone written to them? Or Am I wrong? Can someone please clarify this mess for me..