i have serious problem that i cant use my iphone anymore. 1.I had unlocked jailbreaked iphone(ios 4.02) just a few days ago. 2. I tried my iPhone upgrade to 4.2.1 and retain original baseband(ios 4.02) and unlocked with Tiny Umbrella. But i couldnt succeed it. 3.I tried to restore 4.02, then 4.1, later 4.2.1 dozens and dozens of time but i couldnt succeed it.Every time i tried i was getting error 1013. 4.I tried restore by another computer but nothing changed. 5.c:\windows\system32\drivers\etc\hosts Ive changed host file with notepad; Remove the line that has gs.apple.com completely and save the file.But this time error changed to 3004 6.I used to recboot, tiny umbrella and redsn0w_win_0.9.6b6 to kick out of recovery mod but nothing changed. Im just see connect itunes screen with my iphone. i cant see the emergency call either.What should I do ? Please experts help me ! I would appreciate your help ! asap!