Downgrading from ios4 3gs 5.1.3.04?

[raghavmehra]

i have an iphone 3gs 5.1.3.04...i updated it to ios4 but now dont know how to unlock n jailbreak it..can you tell me how to do it or downgrade to a lower firmware n then unlock it?

only unlocking would do..Thanks

[mozarela]

you need shsh files saved from version 3.1.2 or 3.1.3 otherwise you're stuck with 4 for now

[allicatmeow]

there's no way to unlock that setup right now. just have to wait like the rest of us. you can't unlock without a jailbreak.

[iYeow]

i have an iphone 3gs 5.1.3.04...i updated it to ios4 but now dont know how to unlock n jailbreak it..can you tell me how to do it or downgrade to a lower firmware n then unlock it?

only unlocking would do..Thanks

You can read about about downgrading from here :
http://modmyi.com/forums/3g-s-downgrading/685331-howto-setup-local-3gs-restore-verification-server-ecid-shsh.html