. Go to C:\Windows\System32\drivers\etc
Open the host file with notpad
ADD THIS LINE AT THE END
74.208.105.171 gs.apple.com
after doing all these steps successfully
do these steps now carefully no need save shsh.
1-phone should be off now connect to itunes with usb it will turn on normal(phone should be activated).
2-now don't remove usb and turn off the phone normally.
3-now put the phone in dfu mode while connected.
4-now hold shift button and restore it with 4.0.1 it will be done successfully.
remember do these steps carefully as stated
best of luck
Open the host file with notpad
ADD THIS LINE AT THE END
74.208.105.171 gs.apple.com
after doing all these steps successfully
do these steps now carefully no need save shsh.
1-phone should be off now connect to itunes with usb it will turn on normal(phone should be activated).
2-now don't remove usb and turn off the phone normally.
3-now put the phone in dfu mode while connected.
4-now hold shift button and restore it with 4.0.1 it will be done successfully.
remember do these steps carefully as stated
best of luck