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  • iPhone OS 3.1 - All you need to know
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    It's been quite a while since Apple released the OS 3.1 for iPhone and there's been a lot of confusion regarding it's Jailbreak Status etc. Therefore, here's a summary of do's and dont's
    • According to ChronicDev, the 3.1 GM seed is still vulnerable.
    • It has been confirmed by MuscleNerd from DevTeam that iTunes 9 doesn't interfere with jailbreaking so you can update iTunes <s>but make sure that you do not update your device firmware to 3.1 yet if you want to jailbreak</s>. UPDATE: Jailbreak for OS 3.1 has been released but for the iPhone 2G, iPhone 3G and iPod Touch 1G ONLY and NOT iPhone 3GS, iPod Touch 2G and iPod Touch 3G! Therefore, update only if you have older hardware
    • Saurik confirms once you update to 3.1, there's <s>no way to downgrade</s> to an earlier version as iTunes no longer signs the older firmware. Therefore, if you do not have your ECID information saved, <s>you're completely stuck</s>! For those who have the information saved, there should be a solution out soon. UPDATE: 3.1 can now be downgraded to 3.0 but remember, the baseband is not downgraded along with the firmware, so you might still be permanently locked even though you can now jailbreak 3.1 in future.
    • The new firmware also includes a new baseband which means none of the current unlocking tools will work. Therefore, if you upgrade an iPhone 3G with bootloader newer than 5.8 or an iPhone 3GS, there are chances that your device might get permanently locked.

    Verdict: If you EVER want to jailbreak and unlock your iPhone 3G / iPhone 3GS again, DO NOT UPDATE YET!
    This article was originally published in forum thread: iPhone OS 3.1 - All you need to know started by sayam View original post
    Comments 220 Comments
    1. chemalito's Avatar
      chemalito -
      Excelent summary!!!!!!!!
    1. dhruvmalik's Avatar
      dhruvmalik -
      Thanks to all of those who asked their questions and to all who answered them. Hopefully we have a better insight to 3.1.

      --If I Helped, Please Hit Thanks!--
    1. rwin84's Avatar
      rwin84 -
      Onward march.
    1. mikerlx's Avatar
      mikerlx -
      Why don't the dev make a permanent unlock and leave cydia icy winterboard in place so we all can sync with iTunes no matter what apple upgrade too? And the iPhone can just upgrade itself for unlocks and apple upgrades both smooothly and no total bricked up iPhones.
    1. rel1215's Avatar
      rel1215 -
      question....what info did saurik pull from our phones on the recent cydia upgrade......thought i was good based on the language he included, but now i'm a little worried......
    1. jdm.accord's Avatar
      jdm.accord -
      Quote Originally Posted by djfubar View Post
      I just downgraded from OS 3.1 to 3.0 to jailbreak my Iphone 3G again
      Right, but this only allows for re-jailbreaking, not unlocking correct? You can't unlock using ultrasn0w anymore because of the baseband issue. Is that correct?
    1. sayam's Avatar
      sayam -
      Quote Originally Posted by jdm.accord View Post
      Right, but this only allows for re-jailbreaking, not unlocking correct? You can't unlock using ultrasn0w anymore because of the baseband issue. Is that correct?
      Exactly, once the baseband is upgraded, it cannot be downgraded and thus you cannot unlock
    1. jdm.accord's Avatar
      jdm.accord -
      Quote Originally Posted by sayam View Post
      Exactly, once the baseband is upgraded, it cannot be downgraded and thus you cannot unlock
      And this goes for the 3G as well as the 3GS? Earlier reports had this only affecting the 3GS but its now the 3G as well, correct?
    1. mrguy's Avatar
      mrguy -
      So I installed IBluetooth, and right after that it asked me to reboot,
      so I did, putting my phone on a constant reboot mode, I turned it on the apple
      logo came up, stays up for less than a minute and then the phone turned off
      , the only way I could fix it was to put my phone on restore mode and then.................
      ..... updated to 3.1, but all my hiden apps came back atleast, so guys we need to get this jailbroken.
      I wish I could help some how...
    1. lilskaterpunk's Avatar
      lilskaterpunk -
      Great information, thanks!
    1. Raptors's Avatar
      Raptors -
      Uhm question....if I have a factory unlocked iPhone 2G, can I upgrade to 3.1?!
    1. supr2nr's Avatar
      supr2nr -
      **EDIT CPJR- Link not allowed**
    1. bbillh77's Avatar
      bbillh77 -
      Pick new updates OR everything you want working to work. Think about this we know that AT&T is SUPPOSED to have MMS running by the 25th if the devteam or whoever has figured out a jailbreak or unlock releasing it now would not be a good idea. My swirly mms2 works great now. I don't teather but it is working in my area. Also if they release a jb now apple will undo it on the 25th with the mms update(if it really happens)meanwhile I am going to keep sending pics with swirly as my 5th docked icon from ver 3.0.1 and wait for the dev team to do what they do.
    1. supreme-livin's Avatar
      supreme-livin -
      thx
    1. exNavy's Avatar
      exNavy -
      "It's been quite a while since Apple released the OS 3.1 for iPhone"

      It came out on the 9th, today is the 12th. I might call a week "a while" but not three days.
    1. jdm.accord's Avatar
      jdm.accord -
      Quote Originally Posted by exNavy View Post
      "It's been quite a while since Apple released the OS 3.1 for iPhone"

      It came out on the 9th, today is the 12th. I might call a week "a while" but not three days.
      I took that to mean the beta version as well, not just the finished product.
    1. StealthBravo's Avatar
      StealthBravo -
      I think he was talking about the betas
    1. TECHFRK's Avatar
      TECHFRK -
      SWEET!!! Make it happen
    1. asae's Avatar
      asae -
      I have a jailbroken factory unlocked 3Gs with 3.0.1, all of the sudden my push is not working anymore (Yahoo Messenger and IM Plus) - always popped up asking me to connect to iTunes... and everytime i connect to iTunes is always offer me to update to 3.1.

      Is Apple forcing to update to 3.1 by disabling push for the 3.0.1? does anyone experience similar issue?
    1. StealthBravo's Avatar
      StealthBravo -
      Yea! Let it rain!