I have saved my SHSH Blobs for 5.1.1 using Tiny Umbrella. I have an Iphone 4 GSM phone. I have tried to follow the guides to downgrade firmware, but constantly getting Itunes error 3194 & 1600. I have my device in Pawnage DFU Mode via Ireb. Then pressing shift (Windows) and pointing to a custom 5.1.1 Firmware I made using Redsnow. I have tried deleting GS Apple line in Host file and running TSS Server in TU, but neither has allowed me to restore. I have tried multiple computers both Mac and PC. Would appreciate any help on this topic. Thanks