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Discuss Accouple Questions at the iPhone 3GS - Hackint0sh.org; 1. First, I have a jailbroken iPhone 3GS with Firmware 4.1 (I have ATT so ...
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    Default Accouple Questions

    1. First, I have a jailbroken iPhone 3GS with Firmware 4.1 (I have ATT so no unlocking needed) and I'm thinking of upgrading it to 4.2.1.
    A. Is it worth the upgrade?
    B. What is the best method (program to use and a link to a tutorial (preferable))?

    2. Second, is there away to make a Custom Firmware that is the exact duplicate of your phone, it's programs and settings.
    Everytime I have to upgrade it or if it breaks it usually means going to putting custom firmware from pwnage on my phone and going to cydia and re-downloading all of my programs and putting my settings (themes, etc.) back into place. I would like the ability to back up my phone as a custom firmware and have iTunes restore all of my settings and cydia programs

    If anyone could provide answers to either one of these questions I would greatly appreciate it.

    Thanx



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    Super Moderator Array Olethros's Avatar

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    Quote Originally Posted by nnny View Post
    1. First, I have a jailbroken iPhone 3GS with Firmware 4.1 (I have ATT so no unlocking needed) and I'm thinking of upgrading it to 4.2.1.
    A. Is it worth the upgrade?
    B. What is the best method (program to use and a link to a tutorial (preferable))?
    You left out two very important details that help me answer your question:

    1. Old or new bootrom?
    2. Do you have a SHSH saved for 4.1?


    Without those two details, my suggestion is to stay with 4.1 and wait for a less restrictive jailbreak for 4.2.1


    Quote Originally Posted by nnny View Post
    Second, is there away to make a Custom Firmware that is the exact duplicate of your phone, it's programs and settings.
    Everytime I have to upgrade it or if it breaks it usually means going to putting custom firmware from pwnage on my phone and going to cydia and re-downloading all of my programs and putting my settings (themes, etc.) back into place. I would like the ability to back up my phone as a custom firmware and have iTunes restore all of my settings and cydia programs
    I've answered this question before.

    In theory, yes - for the system partition at least. In reality - no.

    The imaging is simple enough and is used by police/forensics investigations.

    However packaging this in such a way that it could be restored onto the phone.. No one outside of Apple has done such a thing. The whole process is undocumented.

    Plus most of what you are talking about is installed on the media partition (which simply isn't practical to image)

    The reason pwnagetool doesn't support an "update" custom IPSW, only a "restore" custom IPSW is mostly to do with Cydia.

    It's technically very difficult to guarantee a stable update when you have installed packages from Cydia. These can modify system files and system state. In both update and restore, the OS/System partition is wiped and a new image is restored to it. So any Cydia packages that installed/modified files to the system partition - well at best they need to be reinstalled.

    Cydia packages often break with newer iOS versions (because some hook in at so low a level) - so it isn't enough to simply keep track of what packages you had installed previously and then reinstall them (very few package developers include install tests to block install on a higher iOS version)

    What I do is use the iTunes backup system - I extract this out to my computer and then selectively restore the key files I need to reinstall afterwards. Mostly this is to keep my saved game settings and high scores as well as text messages and call history. I don't do themes, but I do use quite a few Cydia apps and tweaks.
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
    -

    iPad 3G 64GB (4.3.3, Redsn0w) oldest SHSH 3.2.2
    iPhone 4 32GB (4.2.1, Redsn0w JB-monte) oldest SHSH 4.1
    iPhone 3GS 32GB (4.3.3; Pwnagetool) factory unlocked oldest SHSH 3.1
    iPhone 8GB (3.1.3; Pwnagetool) AT&T Locked - Unlocked with bootneuter

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    Quote Originally Posted by Olethros View Post
    You left out two very important details that help me answer your question:

    1. Old or new bootrom?
    2. Do you have a SHSH saved for 4.1?


    Without those two details, my suggestion is to stay with 4.1 and wait for a less restrictive jailbreak for 4.2.1
    I believe I have a new bootroom
    I purchase the iPhone 3GS in June 2010 right after iOS 4
    had been released.
    So I jailbroke with pwnage a week or two after purchase
    (it came with iOS 4)
    How would I double check this information?

    Through Cydia I clicked on the link regarding SHSH on the top of the homepage which I believed saved my SHSH file.
    I'm not 100% sure if I saved it or not.
    That's the only time I have seen SHSH on my device.

    If I still have not saved my SHSH how would I go about doing so?

    Quote Originally Posted by Olethros View Post
    I've answered this question before.

    In theory, yes - for the system partition at least. In reality - no.

    The imaging is simple enough and is used by police/forensics investigations.

    However packaging this in such a way that it could be restored onto the phone.. No one outside of Apple has done such a thing. The whole process is undocumented.

    Plus most of what you are talking about is installed on the media partition (which simply isn't practical to image)

    The reason pwnagetool doesn't support an "update" custom IPSW, only a "restore" custom IPSW is mostly to do with Cydia.

    It's technically very difficult to guarantee a stable update when you have installed packages from Cydia. These can modify system files and system state. In both update and restore, the OS/System partition is wiped and a new image is restored to it. So any Cydia packages that installed/modified files to the system partition - well at best they need to be reinstalled.

    Cydia packages often break with newer iOS versions (because some hook in at so low a level) - so it isn't enough to simply keep track of what packages you had installed previously and then reinstall them (very few package developers include install tests to block install on a higher iOS version)

    What I do is use the iTunes backup system - I extract this out to my computer and then selectively restore the key files I need to reinstall afterwards. Mostly this is to keep my saved game settings and high scores as well as text messages and call history. I don't do themes, but I do use quite a few Cydia apps and tweaks.
    I figured this was the case. It still would be great if something like this existed if not for the purpose of restoring rather than upgrading.

    Thanks Olethros for getting back to me so quickly.

  4. #4
    Super Moderator Array Olethros's Avatar

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    Quote Originally Posted by nnny View Post
    I believe I have a new bootroom
    I purchase the iPhone 3GS in June 2010 right after iOS 4
    had been released.
    So I jailbroke with pwnage a week or two after purchase
    (it came with iOS 4)
    How would I double check this information?
    99.99% you have new bootrom. Bootrom - The iPhone Wiki to confirm.

    I would advise you to stay away from 4.2.1 until an untethered jailbreak is released. It's just not worth the hassle to put up with untethered jailbreak on an iPhone.

    Quote Originally Posted by nnny View Post
    Through Cydia I clicked on the link regarding SHSH on the top of the homepage which I believed saved my SHSH file.
    I'm not 100% sure if I saved it or not.
    That's the only time I have seen SHSH on my device.

    If I still have not saved my SHSH how would I go about doing so?
    TinyUmbrella can query Cydia and report back which SHSH you have saved. Most likely you have 4.0.1 and higher. The Firmware Umbrella - TinyUmbrella

    If you're not keen on Java (TinyUmbrella is a java app) or you don't have access to a computer. There's an app in Cydia called iSHSHit which allows you to query Cydia for your SHSH blobs and then email them to yourself.
    Last edited by Olethros; 01-05-2011 at 09:44 AM.
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
    -

    iPad 3G 64GB (4.3.3, Redsn0w) oldest SHSH 3.2.2
    iPhone 4 32GB (4.2.1, Redsn0w JB-monte) oldest SHSH 4.1
    iPhone 3GS 32GB (4.3.3; Pwnagetool) factory unlocked oldest SHSH 3.1
    iPhone 8GB (3.1.3; Pwnagetool) AT&T Locked - Unlocked with bootneuter

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

 

 

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