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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. dmartin2's Avatar
      dmartin2 -
      Quote Originally Posted by bigcat View Post
      I'd say the chances of getting a non-3.1 phone from Apple are slim to none
      Why so little hope? It's only been a week.
    1. confucious's Avatar
      confucious -
      Some people are still getting older FW - others are saying Apple won't let you pout of the store without installing the latest FW. I guess it depends on if you are lucky or not.
    1. dmartin2's Avatar
      dmartin2 -
      Quote Originally Posted by bellbm View Post
      I'm afraid I may need to exchange my 3GS phone since I may have fried the battery. If i get one from the Apple store, and it still has 3.0 or 3.0.1, am I able to use the regular jailbreak and unlock methods?
      If you happen to be given a 3GS with 3.0.x, then you will be able to use the redsn0w/cydia jailbreak and unlock method.

      Do NOT restore afterward. The devteam has yet to release tools for 3GS without cydia "on files".

      So don't screw up you're phone after jailbreak and/or unlock

      Quote Originally Posted by confucious View Post
      Some people are still getting older FW - others are saying Apple won't let you pout of the store without installing the latest FW. I guess it depends on if you are lucky or not.
      Thanks for the input.

      It's interesting people are saying apple won't let them out of the store without installing FW... I was fairly positive that geniuses couldn't do an in-store restore/upgrade.

      Now you would obviously need to go to your appointment with 3.1 FW installed, but the only thing apple would do after handing you the refurb is a soft activation.
    1. bigcat's Avatar
      bigcat -
      Apple is pretty good at this. Not sure how they do it. Looks like they update the stock before releasing anything. Again, not sure how they manage to do it.

      Quote Originally Posted by dmartin2 View Post
      Why so little hope? It's only been a week.
    1. z28kid's Avatar
      z28kid -
      Quote Originally Posted by theron.roland View Post
      as for ECID, and files to be retrieve from the 3GS, you no longer need to do this, as Cydia can do it for you

      FIRST, DOING THIS IS ONLY REQUIRED FOR 3GS OWNERS, ALL OTHER IPHONES ARE SAFE AGAINST THIS BY DESIGN, IT'S A NEW SECURITY MEASURE FROM APPLE

      with 3Gs
      you need:
      3Gs on firmware 3.0 or 3.0.1
      redsn0w 0.8
      Mac
      Windows
      Linux
      iPhone 3GS 3.0 firmware ipsw file
      3.0_3GS

      all you do now, is jailbreak the phone using redsn0w 0.8, and point redsn0w to the v3.0 file you've downloaded when it asks

      after the jaiblreak, run cydia on your phone, install all the essential updates, cydia will close, start it again, and it will ask you if it can put your phone data on file for later use

      once you've done this, and cydia displays "phone data on file" at the top, you are sorted

      this will enable you to always be able to downgrade to 3.0 software if you've updated accidentally, however, it doesn't allow you to downgrade the basedband, so, you won't be able to network unlock the phone unless an updated unlock is created

      if you now need to downgrade your firmware, follow the tutorial on Saurik's website: Downgrade Tutorial
      Thanks but I also stated that I had missed both chances of getting the files needed. I believe I said I was stuck on the 3.01 until 3.1 jb is out. If I didnt say it here I said it somewhere else
    1. alan5354's Avatar
      alan5354 -
      hi All,

      Any idea were to download the restore file for 3.1 for windows?
    1. confucious's Avatar
      confucious -
      If you just want to update to 3.1 you can just hit update in iTunes. Or the files are available from the download section on this site.
    1. andrewbrimberry's Avatar
      andrewbrimberry -
      How can they force you to upgrade your software? Last time I checked, I am the customer. Tell them tough !@*$. I know telling them you don't have your SIM or you are using your SIM in another phone temporarily may stop them from forcing the issue too.
    1. confucious's Avatar
      confucious -
      How can they force you to update? They can't. But on the 3GS they can stop you loading anything but the latest FW if you have to restore (unless you have your signed files)

      BTW - you're not really still on 3.0 Beta 4 are you?
    1. zeal65's Avatar
      zeal65 -
      I updated to 3.1 also lost my tethering ability anyone knows how to getroundit??
      kneed toknow how be abletotether running 3.1
      help. Help help
    1. confucious's Avatar
      confucious -
      You can't tether in 3.1 unless your carrier supports it.
    1. fenwayfrank82's Avatar
      fenwayfrank82 -
      3.1 jailbreak will be out soon enough, although it might be permanantly locked but i dont care i have AT&T anyway i just wanna jailbreak my damn phone to get my sick iElegance PRO theme back damn
    1. metaserph's Avatar
      metaserph -
      I'm using Addition's iPhone Modem 3 for tethering, works just fine. I thought the $10 was well worth not having to deal with the hassle of ATT / Apple. Just my two pennies...
    1. oldmonk000's Avatar
      oldmonk000 -
      Quote Originally Posted by sayam View Post


      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 but make sure that you do not update your device firmware to 3.1 yet if you want to jailbreak. 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 no way to downgrade to an earlier version as iTunes no longer signs the older firmware. Therefore, if you do not have your ECID information saved, you're completely stuck! 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!
      friend yours is very useful information. I did jail broke my iphone 3g by using redsnow. couple of days back when i connected my iphone in my itunes it asked me to upgrade to 3.1. I entered yes after that everything gone. my cydia and all the applications. now again when i tried with my redsnow and previous fimware its not jail breaking. For i phone3g 3.1, is there any special redsnow and filmware to jailbreak. please give me a solution to jailbreak again. thanks in advance
    1. confucious's Avatar
      confucious -
      You can use pwnage on a Mac to JB
      RedSn0w for 3.1 has not yet been released.
      You can not now unlock but obviously you don't need to.
    1. oldmonk000's Avatar
      oldmonk000 -
      :::::::::::::::
    1. genuino's Avatar
      genuino -
      After having to restore to 3.1 (missed the ECID message on Cydia), I had no idea what to do. I actually was having issues with the 3G signal or bad internal antenna, called Apple and they made an appointment on the Apple Store here in Atlanta, went there and they looked at it, decided to give a new one, and guess what, it was 3.0.1! woohoo!, which by the way doesn't have the issues I was having. Went home, got it going with redsn0w, JB again, I am a happy man again . To my surprise, when Cydia was installed, gave me the "Make my life easier" button, clicked and now I'm back jailbroken and Cydia has my 3.1 ECID SSHS on file, nice because I missed it the first time, thank you Cydia!
    1. oldmonk000's Avatar
      oldmonk000 -
      friend have they released redsnow for os3.1, if you have link to download let me know. thanks in advance. Because when i updated from 3.0 to 3.1 i lost cydia and all the applications.
    1. VenomousSVT's Avatar
      VenomousSVT -
      still patiently waiting for a 3gs jailbreak... i hadnt jailbroken my 3gs yet and didnt even think about what i was doing when i did the 3.1 update... dont care anything about unlocking but not having my themes is bugging the crap out of me.
    1. iMrBrett's Avatar
      iMrBrett -
      hey im alot of research for the whole 3.1 upgrade thing and the only reason i considered it was for MMS. i saw you were a fellow dallas fan so i figured you would be best to ask. what MMS software seems to be the best for you? thanks

      Brett