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Discuss AT&T Activated 1.1.1 upgraded phones: Downgrade? at the General - Hackint0sh.org; If I have a phone that was properly activated with iTunes with AT&T and I ...
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    J to the T. Shaken, not Stirred Array thecompkid's Avatar

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    Default AT&T Activated 1.1.1 upgraded phones: Downgrade?

    If I have a phone that was properly activated with iTunes with AT&T and I upgraded to 1.1.1, but am regretting it a little , what consequences would I suffer if I used the downgrade instructions? Would I need to activate it outside of iTunes (is that even a big deal?) or would it pretty much be the same as any other restore where you can restore your iPhone backup only with a few more hiccups?

    EDIT: I found the answer, posted below.
    Last edited by thecompkid; 09-30-2007 at 09:12 PM.



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    J to the T. Shaken, not Stirred Array thecompkid's Avatar

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    Quote Originally Posted by vfxdude2 View Post
    Thanks Kmac! This totally works. To all you nay sayers... if you don't believe it, don't try it! ;-)

    I thought I'd add my personal experience with this. It took me several hours and multiple attempts to actually get this to work. Perhaps this will help someone if they are running into similar things.

    By the way, this was the state of my system and phone:
    1) Latest iTunes
    2) I upgraded my phone to 1.1.1 a few days ago
    3) Prior to upgrading, I had a jailbroken phone with native apps installed, but I never messed around with the SIM unlocking stuff -- I've had AT&T service for 10 years, so I used the "Apple/AT&T approved" way of activating my phone.
    4) I tried several times to downgrade the firmware and was always able to restore to 1.1.1 after the phone got hosed in the attempt. It never bricked or anything.
    5) I plugged my phone into the computer without using the dock (this might not mean anything; just trying to be complete...)

    Quote:
    Originally Posted by Kmac1985
    Here are the steps:

    1) Make sure you have a copy of the 1.0.2 firmware handy and decrypted
    2) Reboot iPhone holding top (power) and home buttons *BUT* release the top button 10 seconds into it (right after the screen goes dark)

    This step took me a while to get right.

    This is what I did:
    1) Held down power and home buttons
    2) Got the power-off slider screen after about 5 seconds
    3) Continued holding down power and home
    4) Waited maybe 3 or 4 seconds more
    5) Released power, but kept home HELD DOWN

    Quote:
    3) The iPhone screen will appear to be off, but start iTunes (latest version worked for me on the Mac)
    4) Option+Click restore and select the 1.0.2 firmware ipsw

    At this point, RELEASE the home button.

    Quote:
    5) The phone will restart and error out at the end, this is expected

    I had to try this a few times before it actually worked. I read a couple things around the internet about people having to switch the port into which their USB cable was connected in order for a firmware update to work. I tried that; I don't know if that actually caused it to work, but it's something you might want to try.

    Quote:
    6) Shutdown iTunes
    7) Launch the latest iNDpendence
    8) Jailbreak the phone using a decrypted 1.0.2 (it will flash all sorts of error, but stick with it)
    9) Activate the phone

    Ok, I'm a little hazy on what I did here... I think I reconnected to iTunes to re-activate the phone (recall that I initially activated using the Apple/AT&T approved method), quit iTunes, ran iNDependence, and was able to jailbreak without ANY errors.

    Quote:
    10) It will show the SIM error but you should be able to get back in

    I didn't get this error either...


    One more notable thing: After I completed the jailbreak, at some point I think I rebooted the phone and iTunes came up again. It said "this phone has already been synced to this computer. Restore?" or something like that. Instead of restoring, I clicked the "Activate as new phone" button. This didn't actually require me to sign up for service again -- it just didn't copy all the old files back onto the phone. I think the real activation info is stored on the SIM. At some point, iTunes recognizes this and knows you have a working, activated phone.

    Anyway, I did have to re-sync all my addresses, phone numbers, etc. from scratch.

    So... a bit of a hack.... but, that's why that call it a "hack." ;-)

    I can confirm that it works. Thanks again, KMac! You sure have some patience to have figured this out! :-)

    -vfxdude2
    I would just like to tell everyone that I found the answer I was looking for, and I posted it for future reference.

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    J to the T. Shaken, not Stirred Array thecompkid's Avatar

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    Okay, sorry for all the posts, but I'd like to now post my own experience.

    I followed the instructions posted above, and it was even easier than described.

    Some tips:
    This is how you do the first part: Before you begin, have the iPhone plugged in, and quit iTunes. Hold down the home and power buttons until the screen goes dark, wait about 1 second after the screen goes dark, then release the power button, but keep your finger on the home button. Launch iTunes (keep on holding that button!) and wait for it to say that it detected a phone in recovery mode. Then you can release and follow the instructions.
    When the restore completes, it will error out as expected, and the phone will not boot into the OS, just into the "gold triangle" screen. At this point, quit itunes and open up INdependence. For me, that was all I needed to do. Right after I opened up indepencence, it went to the activation screen, then, when iTunes opened, it reactivated itself and restored all my data, only now I had 1.0.2.

    This is really great. Now, we can all go back and forth between the two FWs and not worry about anything. Here's to hoping that 1.2.1 is a long way off.

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    So does all of this mean that any phone (including a brand new one from factory) with FW 1.1.1 now can be downgraded to FW 1.0.2 and be activated?
    R o n

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    Quote Originally Posted by thecompkid View Post
    Okay, sorry for all the posts, but I'd like to now post my own experience.

    I followed the instructions posted above, and it was even easier than described.

    Some tips:
    This is how you do the first part: Before you begin, have the iPhone plugged in, and quit iTunes. Hold down the home and power buttons until the screen goes dark, wait about 1 second after the screen goes dark, then release the power button, but keep your finger on the home button. Launch iTunes (keep on holding that button!) and wait for it to say that it detected a phone in recovery mode. Then you can release and follow the instructions.
    When the restore completes, it will error out as expected, and the phone will not boot into the OS, just into the "gold triangle" screen. At this point, quit itunes and open up INdependence. For me, that was all I needed to do. Right after I opened up indepencence, it went to the activation screen, then, when iTunes opened, it reactivated itself and restored all my data, only now I had 1.0.2.

    This is really great. Now, we can all go back and forth between the two FWs and not worry about anything. Here's to hoping that 1.2.1 is a long way off.
    Very simple solution to go back to 1.1.1, thecompkid, vfxdude2, Kmac!

    Worked like a charm for me. I had the Incorrect SIM error, even with an active AT&T SIM(!), but using the above technique I could go back to 1.0.2 without problems.


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    So Im sorry to keep this going but I have a 1.0.2 iphone that has never been unlocked. I am tempted to update, but I am scared that If I do i wont be able to downgrade back.
    So If I Do upgrade, The downgrade will still be able to make calls and sms, no incorrect sim issue?

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    If your phone already has 1.0.2 don't update (if anything just unlock it)...just wait for a solution to become available for the new FW. You will not gain anything from upgrading and then downgrading except for a new modem vs.

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    I understand and thats why I havent upgraded, But I have no Desire to Unlock? I am fine with AT&T. I Just want to test the new firmware and be able to come back to 1.0.2 if I desire, Which I Probably will due to no 3rd Party apps

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    J to the T. Shaken, not Stirred Array thecompkid's Avatar

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    Quote Originally Posted by squanto11 View Post
    I understand and thats why I havent upgraded, But I have no Desire to Unlock? I am fine with AT&T. I Just want to test the new firmware and be able to come back to 1.0.2 if I desire, Which I Probably will due to no 3rd Party apps
    Yeah, that was the situation I was in. You can downgrade just fine, just follow the instructions above.

    Does anyone else think that Apple intentionally left this hole open, thinking it was the least they could do? I think that they would have been more than capable of stopping it if they wanted to by comparing the FW nums before the restore is actually done instead of after.

 

 

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