Help with 4.2.1 or maybe 4.3.5 jailbreak.
ok, so... I was given a 3GS (new bootrom) to jailbreak/unlock. It was running 4.2.1 . . I jailbroke it with redsn0w tethered. I also saved the SHSH to Cydia. But then i read about a Greenpois0n untethered jailbreak. So i tried that but it "failed :("
So after that I couldn't even boot tethered . Therefore i tried a regular restore & update to 4.3.5. That went fine (with tinyumbrella running) until the very end. It seemed to take but now just boots to the usb/itunes screen.
It doesn't seem like i can downgrade to 4.2.1 either. Even custom IPSW.
Should i make a 4.3.5 custom IPSW? I tried with pwnage tool but it says wrong firmware bundle.
I would really appreciate any ideas.
Man, this has been a headache :-/