The 3gs was unlocked via ultrasnow and has an ipad bb. After putting 4.1 on it I wanted to restore to 4.3.3, without luck. After a day of struggling I figured out I need to use tinyumbrella to bypass 3194 error and to put it into pwnd mode with ireb. After 4.3.3 was put onto the phone it got stuck into DFU mode. It is possible to restore it with 4.X stock firmware and even jailbreak it but it stucks in DFU. Please help me I need your help, I have no idea how to make it bootable. SHSH was not saved or anything, I thought it would be fine. DFU mode gives a total blank screen, the screen only comes up while restoring and jailbreaking. Is this because not using custom firmware?