Upgrade iOS 3.1.3

Discussion in 'Jailbreaks and iOS Hacks' started by dhfernz, Dec 8, 2011.

  1. dhfernz macrumors newbie

    Dec 8, 2011

    I am a newbie to jailbreak. I have an iPhone 3GS. Forecast v1.2 gives the following details about my phone

    Baseband: 05.12.01
    Bootloader: 6.4
    Model: MC137

    Jailbreakable?: Yes (with Spirit/JBme)
    Unlockable?: Already Unlocked
    Tethered?: Maybe - Depends if Refurb
    BootRom: 359.3.2

    Now, i want to upgrade to iOS 4.0 or later. Question is a) Is it possible b) If yes, how do i do it.

    You will need to give me a step by step instruction. Don't want the phone to turn brick!

    Many thanks in advance.
  2. Mess macrumors 6502


    Nov 27, 2008
    Newcastle Upon Tyne, UK
    unless you have the SHSH blobs saved for the firmware versions upto date your only going to be able to install 5.0.1

    if your next question is, what are SHSH blobs, your answer is, your only going to be able to install 5.0.1 :rolleyes:

    and you wont need step by step instructions for that as you will just connect it to itunes.

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