3GS Downgrade 4.0.2 to 4.0.1 alternative solution !

After trying some of the posts here is way that i found working..


Important .


Must have genuine windows not WGA crack so it wont let u save host file.. probably this is the reason many say it fail on their pc but work in other pc..


open the file C:\Windows\System32\drivers\etc\hosts (Windows) or /etc/hosts (Mac OS X) and add the following entry to the bottom of the file


1.press START run in windows
put C:\Windows\System32\drivers\etc\hosts


add 74.208.10.249 gs.apple.com at the bottom.


-leave the old xxx.xx.xx.xxx gs.apple.com (dont replace anything just add this to the bottom. close host file (will save if using genuine windows)


NOW


1- you'll need this TinyUmbrella download here The Firmware Umbrella


2- Open up Tiny Umbrella -> tick Advanced Option -> Select 3Gs 4.01 -> Cydia and Click SAve My SHSH


It will now say your shsh was found in cydia


3-put the phone in DFU mode while connected.


4-now hold left shift button and restore it with 4.0.1 it will be done successfully.

now u may jailbreak / unlock