My son decided he knew better than Dad and restored his 3gs on itunes, it was jailbroken and unlocked for T-mobile. Now i cant unlock it, it gets stuck. And if i try to use custom firmware it gives me error 2100. He upgraded to 5.1 i think from 5.0 custom ipsw. It is running ipad baseband. edit: 3194 error with custom firmware attempt to upgrade. Already put # in front of host I.P and also tried delete method. No good.