bro..i have a iphone 3gs new bootrom...got prob during restore 4.2.1 to 4.3.1...the prob is, nearly completing the restore session to 4.3.1, the iphone back to "restore" message and now the iphone cannot turn on at all...mayb stuck at DFU mode..i've already tried all procedures to restore and still have the same problem...plus, got error 1600 and 1601..i've also tried to other laptop also same prob..now the iphone cannot turn on...pls help me =(