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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. joe997us's Avatar
      joe997us -
      Kally, I had similar trouble when I was jbing my 3gs for the second time. You probably don't have the same problem though because mine was more of a here's your sign thing. Anyway I had the 3.0 firmware BUT it was for the 3g phone. It took me a while before I realized what the problem was, but it makes a huge difference, obviously. Again, probably not your issue but I thought I'd mention it. By the way, GO DEV TEAM!!!!
    1. dhruvmalik's Avatar
      dhruvmalik -
      Quote Originally Posted by Simtech View Post
      This doesn't look very good for you unlockers......

      THANK GOD!!! I bought the factory unlocked 3GS. All I care is for JB So I can change my APN.

      --If I Helped, Please Hit Thanks!--
    1. M4tt Dam0n's Avatar
      M4tt Dam0n -
      An update in cydia screwed up my iPhone 3GS and it got stuck at the apple logo. Tried everything to restore to 3.0 or 3.0.1 but it did not work. Now I have to update to 3.1...let's hope there is a jailbreak soon.
    1. confucious's Avatar
      confucious -
      Quote Originally Posted by Simtech View Post
      This doesn't look very good for you unlockers......
      People have been warned time and time again. If you want to unlock do NOT upgrade to 3.1

      I'm not sure what else can be done.

      People do update and then moan that they can't upgrade.

      It is quite simple, if you want to Unlock - wait until the Dev Team tell you it is safe and how to do it.
    1. StealthBravo's Avatar
      StealthBravo -
      I say just roll the dice and hope for the best =P
    1. blkcadi's Avatar
      blkcadi -
      Sad news about the people that are already running 3.1. as Confucius said when will they learn. sux
    1. Simtech's Avatar
      Simtech -
      Confucius say.. one who eat jelly bean, fart in colorful ways...
    1. Kally's Avatar
      Kally -
      I tried it on Friday night and that was what I was getting but I will try it again - can you send me a link to a good link for the 3.0? I was also using the redsnOw 8.

      Joe997us - what did you do to get the 3.0 firmware that worked with the 3Gs? Can you give me a hint of what I need to do??

      Thanks.
    1. z28kid's Avatar
      z28kid -
      You can tell im a noob as my post count is low but these other new people who have less than I, for shame in you for not reading everything first before you "messed up" and upgraded your phone. I and other are doing the correct thing and waiting for the dev team. I just wish I knew how to get the files that may be needed in the future. I have my ECID but I dont have the other two files. Also its too late for me to get them as I would have to restore to 3.1 for the grabber to work. Least from my understanding. I was almost contimplating doing it but I fought the urge.
    1. confucious's Avatar
      confucious -
      Quote Originally Posted by Kally View Post
      I tried it on Friday night and that was what I was getting but I will try it again - can you send me a link to a good link for the 3.0? I was also using the redsnOw 8.

      Joe997us - what did you do to get the 3.0 firmware that worked with the 3Gs? Can you give me a hint of what I need to do??

      Thanks.
      If you have a 3GS you can not restore to anything other than 3.1 at the moment.
    1. z28kid's Avatar
      z28kid -
      I dont think that will work for kally. As it has been stated by others many many times. 3gs is unable to restore to anything lower than 3.1 not nice to give false hopes to someone
      beat me to it
      confucious
    1. CaptinPoopy's Avatar
      CaptinPoopy -
      I have not upgraded yet, but I can't get MMS to work for me with 3.0.1 Jailborken.. Idea's on how to get it to work without updating to 3.1??
    1. confucious's Avatar
      confucious -
      Which network? There are many, many threads on the subject.
    1. CaptinPoopy's Avatar
      CaptinPoopy -
      on the AT7T network... Plenty of people say that it works for them on this network...
    1. confucious's Avatar
      confucious -
      So you already know that some people have had success but most haven't? Why not just wait 11 days?
    1. CaptinPoopy's Avatar
      CaptinPoopy -
      waiting 11 days is fine, but i don't want to be out of luck if that update screws my chances to jailbreak it again.... Wanted to know how they did it reguardless....
    1. confucious's Avatar
      confucious -
      Then read the threads on it - why hijack this one?
    1. iphonefreakify's Avatar
      iphonefreakify -
      MuscleNerd worth repeating to nervous 3GS owners: "once JB, always JB" even w/o signed files. Unless you update to official IPSWs.

      yes any currently JB 3GS will be able to update to custom 3.1 and retain the unlock (but please be patient for tools for this)

      Now just wait
    1. zguy916's Avatar
      zguy916 -
      . Ok well I had to restore / update my 3gs to 3.1 with iTunes 9 .........my messages does not have a little camera option for mms ........weird ?!?! Well my question is ,,,,,,,, am I still ok for jailbreaking ,,,because I updated my 3gs to 3.1 ?!?! I have my purplera1nyday file saved but no ibss n ibec saved on cydia but updated so I guess that doesn't matter right ?!?! Please inform me about this guys !!! Thanks