Downgrading to 4.0.1 iPhone 4 from 4.0.2

[gaetanospqr]

Downgrading to 4.0.1 iPhone 4 from 4.0.2 without ever being jb on version 4.0.1 and without ever being signed with Cydia ssh server is possible-! I did it-! Only from past experience with screwing up and trying to figure out how to downgrade was I able to use that Knowledge and apply it in a positive way. Very simple. Basically you're going to put your phone in dfu mode where it shows na next to the iPhone on iTunes go to clarified and look for te ipsw files. Download ipsw for iPhone 4 version 4.0.1 and do the magic shift + update on iTunes as discussed in many forums before for downgrading drop the 4.0.1 ipsw file in follow the prompts on iTunes till u get that error code i forgot what it was 4 digit code i believe, Then you're going to need that old irecovery method to break the loop with the USB cable and cd on iPhone screen. Follow those steps as mentioned on many forums before and then manually reboot the phone by
holding power and sleep.
Then iPhone should be restored to 4.0.1 with carrier service and go to jailbreakme.com and run te jb. It worked for me after going to apple to return my new iPhone with 4.0.1 never jb to resolve an issue and to find that the a holes upgraded me to 4.0.2. So hence my mission to restore and jb with jailbreakme.com. It seriously worked for me. I've been around here before and actually came up with a method to restore when the blitz began with the accidental 3.1.2 upgrades I think. So just give it a twirl and let me know. I can write down detailed step by step if needed but not tonight. Thx and gl.

[j3st3r]

then apple is still signing 4.0.1, you better use tinyumbrella to get your 4.0.1 shsh's while you can, also you can use tinyumbrella to kick you out of recovery mode instead of using irecovery

[gaetanospqr]

I don't think they are signing because I got errors. Never completed. But who knows. I did this last night august 12th. And I got into dfu because when I tried a regular restore from 4.0.2 to 4.0.1 iTunes said it could not proceed with the restore and put my phone into dfu. Leaving me with no choice but to try that method. I could not go forward or backwards left me in limbo

[equlizer]

I cannot use tinyumbrella as it gives me this error:

Device: INVALID X.X.X (XXXX)
Looking for Ipad yada yada yada

And no i dont own an ipad, i have an iphone 4

EDIT: Figured it out. I needed to update the program

[dhamien]

I don't think they are signing because I got errors. Never completed. But who knows. I did this last night august 12th. And I got into dfu because when I tried a regular restore from 4.0.2 to 4.0.1 iTunes said it could not proceed with the restore and put my phone into dfu. Leaving me with no choice but to try that method. I could not go forward or backwards left me in limbo

4.0.1 is still being signed so you should be able to restore to that version without any issues.

[tazmageddon]

how do u downgrade???? i cocked it up and updated my version to 4.0.2 now it wont jai;lbreak how do i get it back to 4.0.1??? please help when i try the shift +restore it opens my f drive but theres no files

[dhamien]

how do u downgrade???? i cocked it up and updated my version to 4.0.2 now it wont jai;lbreak how do i get it back to 4.0.1??? please help when i try the shift +restore it opens my f drive but theres no files

Download the 4.0.1 firmware through this site: iPod, iPhone and iPad Firmware Download (the firmware is downloaded from Apple, so it is legit).

Then in iTunes on the iPhone page, hold down the shift key and press 'Restore'. Then point to the downloaded file. That's it.

[tazmageddon]

thanks m8 will try that cheers

[alphalink]

Whats the old Irecovery method??

[tazmageddon]

no joy! i downloaded the file from the link unpacked it into a folder then went onto itunes held down shift hit restore and it asked where the file was i went to both the original and the unpacked but the folders were empty... any ideas?

Download the 4.0.1 firmware through this site: iPod, iPhone and iPad Firmware Download (the firmware is downloaded from Apple, so it is legit).

Then in iTunes on the iPhone page, hold down the shift key and press 'Restore'. Then point to the downloaded file. That's it.

[jkmonkey]

no joy! i downloaded the file from the link unpacked it into a folder then went onto itunes held down shift hit restore and it asked where the file was i went to both the original and the unpacked but the folders were empty... any ideas?

There's no need to unzip the file you downloaded. If it saved as a zip file then you downloaded it with ie or chrome. Just change the extention from .zip to .ipsw, or redownload it using firefox or safari.

[tazmageddon]

ok ilo try that just now

that worked i see the file now but now when i hit restore it gets the file but then i get error when its validating it

[jkmonkey]

What's the error say?

[tazmageddon]

the iphone could not be restored an unknowen error occured (3194)

i seen on another page that u should hold the power and the activate button down to put the fone into recovery could that be the problem?

[jkmonkey]

Yeah, you can try revery mode. Also check to make sure your hosts file doesn't have any lines that say gs.apple.com in it at all.

[tazmageddon]

the gs.apple.com is something i was told to put in the host file so itunes would conet to cydia but that didnt work either

the file i tell itunes to use is iphone3,1_4.08a293_restore.ipsw

[jkmonkey]

OK, then take that out of your hosts file for right now. Since Apple is currently signing 4.0.1 there's no need to redirect through cydia's server. After you change the host file and save it you'll have to close and reopen iTunes.

[tazmageddon]

ok done

[jkmonkey]

Now try to restore to the fw you downloaded.

[tazmageddon]

still error

it tried to verify it then gives error