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Discuss [3GS] Upgrading Baseband to 3.1 and jailbreaking.. best way? at the iPhone 3GS - Hackint0sh.org; Originally Posted by ramb00 hmm, I thought you can restore from 3.1 standard to a ...
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    Quote Originally Posted by ramb00 View Post
    hmm, I thought you can restore from 3.1 standard to a jailbroken 3.1 custom IPSW, providing your 3GS has been jailbroken at same stage in the past...
    No.

    The moment your 3GS is on official 3.1, you can no longer jailbreak, unlock, downgrade, or restore to a custom 3.1 ipsw made by Pwnage (unless you saved your 3.0 ECID SHSH files on Cydia back in mid-September).

    It does not matter if you were jailbroken before using official 3.1. When you install official 3.1, you erase the jailbreak. Pwange only works on jailbroken 3GSs.

    People are working on a jailbreak for official 3.1 on 3GS, but there probably will not be an unlock for it.


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    Default iPhone 3GS Custom by Atomic OS 3.1 [BB upgrade]

    Quote Originally Posted by Olethros View Post
    I would like to know the answer for this myself. I was expecting pwnage tool to offer this option but it is disabled for 3GS when making custom 3.1 firmware

    I have a factory unlocked 3GS so upgrading to newer baseband is something I actually want to do.

    I have asked musclenerd from the devteam but don't really expect a response as they are all so busy.
    iPhone 3GS Custom by Atomic OS 3.1 [BB upgrade]

    Baseband updated custom for official iPhones ( works great)
    This also fixes the 'no carrier name' issue.
    Moderator Edit: remove warez link

    Attention! It not uCustom, is an ordinary insertion for officially iPhone 3GS (Italy, New Zealand, Hong Kong and more., but NOT USA) If you are ATT customer you can still use it.
    Last edited by Olethros; 02-01-2011 at 10:16 PM. Reason: Moderator Edit: remove warez link

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    Super Moderator Array Olethros's Avatar

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    Please don't post links to copyrighted material. Also this IPSW is prepatched to facilitate application piracy. I would suggest removing this link before an admin deletes your post.

    If a 3.1 OTB jailbreak does not come out soon I will try to document the steps to do this baseband update legally.

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    I am also looking for the bbupdate things.
    But for now, I only success to decrypt the root system from 3.1 with vfdecrypt on snow leopard.
    I cannot decrypt the ramdisk (restore and update) with img3decrypt with the keys and IV from the iPhone wiki.
    All I have is an unmoutable dmg. Is the img3decrypt app still working or is there special step to do ?
    Thanks
    iPhone 3GS iBoot 359.3.2
    3.1.2 Blackra1n / Blacksn0w

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    Super Moderator Array Olethros's Avatar

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    Quote Originally Posted by lolof View Post
    I am also looking for the bbupdate things.
    But for now, I only success to decrypt the root system from 3.1 with vfdecrypt on snow leopard.
    I cannot decrypt the ramdisk (restore and update) with img3decrypt with the keys and IV from the iPhone wiki.
    All I have is an unmoutable dmg. Is the img3decrypt app still working or is there special step to do ?
    Thanks
    There are probably many ways to do this. The way i did it might not be best or ideal for everyone but it worked. Basically you need the following.

    • Jailbroken iPhone
    • DiskAid or similar program to transfer files to/from iPhone
    • Original apple ipsw for your iPhone model.
    • Decryption keys from the iphone wiki for the ipsw you have downloaded.
    • Mac or hackintosh with Snow Leopard installed. If someone can post about how to mount dmg files directly on the iPhone, please do so. This would remove this requirement.


    Example below is for 3GS 3.1 and extracting files from update ramdisk. Adjust the xpwntool command if you are using a different ipsw or ramdisk.
    1. Install either mobile terminal or open SSH on your phone.
    2. Install xpwn from cydia. You may need to change your mode in cydia to hacker to find this package. You can change the mode by going to the manage tab and clicking settings.
    3. Using any unzip program, extract out contents of the ipsw.
    4. The baseband and updater are in both the smaller dmg files. Pick the update dmg (018-5349-086.dmg) and copy it to your iPhone using diskaid or similar program
    5. From a root shell on the iPhone (either via SSH from your computer or from mobile terminal run the following command)
      Code:
      xpwntool 018-5349-086.dmg 018-5349-086.dmg_decrypted.dmg -k 1e23357267715aaffdb0dfbaebd5ea6bea928414cce593a15ac3b27a4c629e7c  -iv 05fbba6bfd7bca47827b866e80b1bd9e
    6. Copy the decrypted dmg back to your computer and mount it. If you are running anything other than snow leopard the files inside the dmg will look empty
    7. navigate to usr/local/standalone/firmware/ on the mounted dmg and you will find the correct files. You only need the two files that begin with 05 and the bbupaterexteme file.


    To flash the new baseband do the following from mobile terminal.
    1. Upload the three files extracted from the dmg to the iPhone for example /tmp using SFTP or diskaid or similar
    2. Code:
      cd /tmp
    3. Code:
      chmod 755 BBUpdaterExtreme
    4. Code:
      launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
    5. Code:
      ./BBUpdaterExtreme update -f ICE2_05.11.07.fls -e ICE2_05.11.07.eep
    Last edited by Olethros; 10-09-2009 at 11:04 AM.


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    @Olethros

    Thanks very much.
    I was trying to decrypt the .dmg directly on my mac as I have done with the root system with vfdecrypt :-)

    Why has it to be done directly on the iPhone and not on the mac ??
    iPhone 3GS iBoot 359.3.2
    3.1.2 Blackra1n / Blacksn0w

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    It doesn't have to be done done directly on the phone. I just could not find a recently updated xpwntool that was compiled for osx. According to what I read, older versions can't handle decrypting files from anything past 3.0 betas.

    I did not try compiling an osx version from source, that would probably also work fine. Assuming the source is being actively updated.

    On a side note, the author of xpwn (planetbeing) has disappeared off the net. The devteam say they have not heard from him for a few months now.

    He was also one of the main people behind redsn0w. (both at the low level helping develop jailbreak for 2G iPod touch and 3GS as well as making the easy to use redsn0w GUI tool)

    So his exit from the iPhone jailbreaking scene (if it is permanent) is a real tragedy.

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    Yes, I also read about planetbeing... I hope he is well.

    In the BB folder from ramdisk, there is also ICE04.05.04_G.epp and .fls

    Is it a older bb firmware ? Do you know why there are in the archive, because as I have understood it is impossible to downgrad the Baseband...
    iPhone 3GS iBoot 359.3.2
    3.1.2 Blackra1n / Blacksn0w

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    Default Re: [3GS] Upgrading Baseband to 3.1 and jailbreaking.. best way?

    Quote Originally Posted by lolof
    Yes, I also read about planetbeing... I hope he is well.

    In the BB folder from ramdisk, there is also ICE04.05.04_G.epp and .fls

    Is it a older bb firmware ? Do you know why there are in the archive, because as I have understood it is impossible to downgrad the Baseband...
    This is the most recent baseband for 2G iPhones. It has not changed since 1.1.4 but it is still there so that 2G owners can restore from any previous 2G iPhone OS release directly to the latest.
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
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    Quote Originally Posted by Olethros View Post
    There are probably many ways to do this. The way i did it might not be best or ideal for everyone but it worked. Basically you need the following...

    ....
    Great post Olethros, thanks.


 

 
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