Downgrade from 4.2 to 4.1 with saved shsh

[marty1]

Hello,

I upgraded my iphone 4 to 4.2 thinking I could jailbreak it without a tethered jailbreak. I should have read more before doing so, but too late now.

The good news, I hope, is that I have saved my shsh' with shshit and with cydia. Can I downgrade my phone back to 4.1 and jailbreak again untethered?

Thank you all in advance for the help.

[Simon]

If you have your SHSH for 4.1 then yes you can. Easiest way is to use tiny umbrella to do it.

[marty1]

Where do I get that program and are the instruction available here? I have both mac and windows, so which is easier?

[Simon]

Here ya go: http://modmyi.com/forums/general/725...e-restore.html

[ihappy]

If you have your SHSH for 4.1 then yes you can. Easiest way is to use tiny umbrella to do it.

+1 on this statment. Tiny Umbrella will definitely help you out

[marty1]

I keep getting error 1604, anyone know why that is?

[marty1]

If anyone knows what this error 1604 means, please let me know. I can't get the firmware to load.

[iYeow]

Error 1604 means you are restoring to custom firmware. You should be restoring to stock 4.1 firmware.
Have you used tiny umbrella ?

[Simon]

Ya, thats a custom firmware error

[marty1]

Yes i am using tiny umbrella. I downloaded the 4.1 firmware from this link http://www.felixbruns.de/iPod/firmware/ on the tiny umbrella instructions from above. I didn't see anywhere that it was custom.

Where can I download the factory 4.1 firmware?

Thanks,

[Simon]

That is the regular firmware then. Not sure why you are getting that error then. Try downgrading without using tiny umbrella.

[iWieduwilt]

Im also getting the same error using tinyumbrella and the same firmware from flexibruns.

[Simon]

Try downloading from somewhere else.

[marty1]

I ended up not using tiny umbrella and just modfied my hostfile to redirect to cydia server, it worked the first time I tried it. The firmware is not the issue.

Thanks, for all the help.

[Simon]

Glad to hear it