How-to? Upgrade 3GS iOS 4.1 JB to iOS 5 JB

Discussion in 'iPhone Jailbreaking' started by fQxhUYESQmLDr, May 11, 2012.

  1. fQxhUYESQmLDr
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    fQxhUYESQmLDr New Member

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    Hi!


    I have an iPhone 3GS 32gb:


    Modem Firmware: 06.15.00
    Model: MC133B
    Serial Number: **9425S13**


    The phone is currently jailbroken and unlocked at iOS 4.1 (8B117).


    How can I upgrade the phone to iOS 5.X, to a untethered-jailbreak-ready and unlock-ready state?


    I have tried an iTunes standard update on a dozen different computers but I always get some sort of error; usually 'this device is not eligible'.


    Please help!


    Thanks,


    Francis Drake
  2. Jmills87
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    Jmills87 New Member Staff Member

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    Unless you have your SHSH blobs saved for the firmware you are trying to restore, you will not be able to restore an older firmware.
  3. fQxhUYESQmLDr
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    fQxhUYESQmLDr New Member

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    Thanks for replying, but why would I want to restore an older firmware? I mean, I am trying to upgrade, right?

  4. Jmills87
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    Jmills87 New Member Staff Member

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    Any firmware other than 5.1.1(which does not have an untethered jailbreak) is considered older firmware.
  5. fQxhUYESQmLDr
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    fQxhUYESQmLDr New Member

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    I get it! Thanks!

    So (if I sacrifice and go untethered) what is the procedure in upgrading to 5.1.1 in my case?
  6. Jmills87
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    Jmills87 New Member Staff Member

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    To upgrade to 5.1.1 you would first need to make a custom firmware(which Im not even sure there is a tool to make a custom 5.1.1 firmware yet) and then you would need to shift+restore it in iTunes.
  7. sidhantchadha
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    sidhantchadha New Member

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    Use Shift+Restore and upgrade in DFU mode from iTunes after downloading the custom IPSW firmware file.

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