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Discuss Downgrade iphone 3G without a working internet connection? at the iPhone 3G - Hackint0sh.org; Hi, I have a bit of a thorny problem that I can't find a definitive ...
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    Default Downgrade iphone 3G without a working internet connection?

    Hi, I have a bit of a thorny problem that I can't find a definitive answer to.

    I have an iphone 3G which is currently running 4.0.2 (05.13.04 modem firmware)
    I say it's 'running' 4.0.2, but that's being over generous. I have put up with my incredibly slow iphone for months now, but I just can't stand it any more.

    My phone was purchased back home in the UK, but I live in the States now, so unlocking is of utmost importance.
    I do NOT have my shsh blobs saved. I tried many times, but got an error message each time, so I just gave up in the end.

    I would ideally like to downgrade to 3.x.x, and I found this guide:
    Downgrade iOS 4.1 to iOS 4.0 / 3.1.3 / 3.1.2 iPhone 4, 3GS, 3G and iPod touch [How to Guide] | Redmond Pie

    The guide seems to suggest that I don't need shsh blobs saved to downgrade my 3G, but there's another problem...

    I have a laptop running OSX, but unfortunately, it is physically damaged and I can't connect to the internet (long story, but believe me, I've tried).
    I do not use windows, and don't even own a copy. Everyone I know is now using Linux (my fault) so I can't even borrow someone else's computer to do this.
    I also do not have an appropriate sim card to activate the phone, so I'm relying on this method not needing activation.

    I can download the necessary files on my other machine and transfer them onto my mac with a flash drive, so as long as the installation process doesn't involve connecting to the internet at any point, I should be able to do it.

    So, is it possible to follow the above guide and downgrade my phone without shsh blobs, a valid sim, or connecting to the internet?



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    Super Moderator Array n1ckn4m3's Avatar

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    The 3G only has SHSH soft-implemented on iOS 4.0+, so you can restore to iOS 3.1.2 in DFU mode without an SHSH. iOS 4.0+ on the 3G requires an SHSH or requires you to have a pwned LLB (older 3G jailbreaks), but the answer is you should be fine to restore back to 3.1.2 from iOS 4 so long as you're in DFU mode. You *may* need to use TinyUmbrella to 'kick' the device out of recovery mode after the downgrade, I honestly can't remember, it's been quite a while since I was playing with a 3G.

    If you don't have a SIM, you'll need to use redsn0w to hacktivate. Since you're not using a version of iOS that requires SHSH, you should be able to restore without internet connectivity, though you will need to download the 3.1.2 IPSW directly from Apple or iClarified's site (they link to Apple's site) and shift/option-restore to point iTunes to the IPSW. Beyond that, searching around on the internet, you can find a version of ultrasn0w that can be manually installed on the device -- added as a package to redsn0w or PwnageTool.

    You don't need to follow the instructions on that page, most of them are for the iPhone 4 and are unnecessary for you -- you need only create a backup, put your phone into DFU mode (or even recovery, I believe, but I'd still do DFU), then shift/option-restore and point at your .IPSW. Last but not least, kick the phone out of recovery if it ends in recovery using TinyUmbrella.

    I hate to say I do not know whether or not the latest version of ultrasn0w (1.2.4 iirc) will function on iOS 3.1.2 -- but quickly searching through google should answer that question for you.

    Also, it's recommended once you hacktivate, jailbreak, and unlock, that you use SAM (Subscriber Artificial Module, google it) to remove the hacktivation and replace with a legitimate activation to ensure push notification works and that you don't see unnecessary battery drain.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

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    Hi, thanks for the comprehensive reply!

    It turns out you DO need an internet connection; as soon as you connect an iphone in DFU mode, itunes queries the apple server.
    If you have an internet connection, you probably wouldn't even notice it happen, but without internet, you can't get the iphone to show up on the sidebar, so shift restore isn't possible.

    Anyway, the good news is that with the help of a filed-sharp soldering iron, a 10x loupe, and some motor armature wire, I managed to fix the ethernet port on my laptop for long enough to do this.

    I cooked the ispw with pwnagetool so no problem getting out of DFU mode.
    For some reason cydia crapped out on me, but I reinstalled it by visiting jailbreakme, and managed to get the phone unlocked.

    Some of my apps didn't work because they were IOS4 only, but I found and installed older versions which work fine.

    The only thing I miss is being able to transfer books into stanza via itunes, but it's definitely worth this minor setback.
    My phone now operates at a normal speed and without the safari crashes I was getting literally every minute or so.

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    Can anyone dumb this down for me? I want to downgrade my 4.2.1 so that when I unlock my phone I do not lose the GPS capabilities...but I don't know a lot of iPhone jargon and my "sim" card is an inactive one that I use just so I can use the 3G as an iPod touch. Will that effect the outcome of my ability to downgrade it to 3.1.3?

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    Downgrading your phone will not prevent you from losing GPS capabilities as you can only downgrade the iOS revision -- not the baseband revision. If your baseband is already too high of a revision to be unlocked, you can not downgrade -- the only real option would be the iPad baseband. But let us know what iOS revision you're on, what baseband you have, and what you want to do, we can give better information.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

    Did we solve your problem? Got a dollar or two spare? Please Donate!



 

 

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