Hey guys, So the story is I wanted to restore my already jailbroken iphone 4 (already on 5.1.1b) to 5.1.1b. I have saved my SHSH with Tinyumbrella, and has also pressed start tss server on TU prior to i restore the phone Only I have got my phone to DFU mode before I tried to restore it back to 5.1.1b I have also deleted any gs.apple.com related command inside the hosts file at /private/etc But, after more than 10 tries, I still couldnt get it to restore. It constantly gives me error 1600. I was wondering if there is anything wrong with Tinyumbrella, but I am not sure.... Can anyone help me?? Thank you in advance!