CAN'T ACTIVATE MY OLD IPHONE

I just bought a new Iphone 5 and gave my old Iphone 3gs to my daughter. She went ahead and tried to update it, something I had never done, and now we can't use the Iphone. We keep getting a message saying COULD NOT ACTIVATE IPHONE. I try restarting it but the same messame comes up again. If it helps at all, when I press the i (info) letter that appears at the bottom of the screen, it says: IMEI 01 215800 301481 0 ICCID: UNKNOWN