Results 1 to 8 of 8
Discuss 3GS AND 3G upgrade to 4.0 --- want to downgrade to 3.1 at the Spirit (jailbreak) - Hackint0sh.org; hello guys, I know everyone has been asking this question but Im new to the ...
  1. #1
    Newbie Array

    Join Date
    Jul 2010
    Posts
    4
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    0

    Talking 3GS AND 3G upgrade to 4.0 --- want to downgrade to 3.1

    hello guys,

    I know everyone has been asking this question but Im new to the forums, and to all of this stuff so I figured I'd go and ask anyways. lol

    I currently have a 3GS and my wife has a 3G. I made the mistake of upgrading to the 4 iOS which made things worse for both phones.

    I want to revert back to my original 3.1 firmware on both. I've read so many threads about this but it all seems confusing.

    I ALSO have the following questions on top of that: (please bear with me lol)
    1. How do kno if you have the new BOOTROM vs. the old BOOTROM???
    2. to get the SHSH files (3GS) the 4 iOS has to be jailbroken first correct?..... which tool is recommended?
    3. and once Jailbroken, which package should I use to save these files?
    4. and once saved... whats next???
    5. if any of this fails. would a restore from itunes fix it or is it very possible to brick the phones?

    Thanks guys appreciate the input
    Last edited by jbarcarse; 07-06-2010 at 07:54 PM.



  2. #2
    Super Moderator Array n1ckn4m3's Avatar

    Join Date
    Mar 2009
    Location
    USA
    Posts
    2,717
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    145

    Default

    Let me stop you early -- to downgrade a 3GS you *need* SHSH blobs for the firmware you are restoring TO. At this point, Apple is not providing these for 3.0, 3.1, 3.1.2, or 3.1.3. If you don't have the blobs now, you can't get them -- so the iPhone 3GS with the new bootrom is stuck on iOS 4.0.

    The 3G itself doesn't require SHSH. You can just download the ipsw, plug into iTunes, hold shift and click on Restore, point to the ipsw, and wait. It will error (1015) when it is done, this is expected -- it means that the baseband is newer than expected.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

    Did we solve your problem? Got a dollar or two spare? Please Donate!


  3. #3
    Newbie Array

    Join Date
    Jul 2010
    Posts
    4
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    0

    Default

    OK thats cool, at least my wife would be happy lmao

  4. #4
    Newbie Array

    Join Date
    Jul 2010
    Posts
    4
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    0

    Default

    so for my 3GS, it is still possible to Jailbreak it right? Just cant restore previous firmware.

  5. #5
    Super Moderator Array n1ckn4m3's Avatar

    Join Date
    Mar 2009
    Location
    USA
    Posts
    2,717
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    145

    Default

    Quote Originally Posted by jbarcarse View Post
    so for my 3GS, it is still possible to Jailbreak it right? Just cant restore previous firmware.
    Unfortunately, no. 3GS needs to have been pwned prior to upgrading to 4.0, and the upgrade to 4.0 must be done with a custom (jailbroken) firmware. Once the factory iOS 4.0 touches a 3GS, if that 3GS doesn't have an SHSH on file, it's stuck on 4.0 and cannot be jailbroken.

    Also, to find out your bootrom, go to Settings -> General -> About. It will tell you the model number of your phone. If it begins with MB, it's extremely likely it's the old bootrom. If it begins with MC, it's most certainly a new bootrom phone. There are more reliable ways to determine this, but this is a pretty accurate and easy way to tell.
    Last edited by n1ckn4m3; 07-06-2010 at 11:02 PM.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

    Did we solve your problem? Got a dollar or two spare? Please Donate!



  6. #6
    Newbie Array

    Join Date
    Jul 2010
    Posts
    4
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    0

    Default

    My 3GS model is MB.... so thats the old BootROM ( most likely) does that make any diff.???? lol

  7. #7
    Super Moderator Array Olethros's Avatar

    Join Date
    Sep 2007
    Location
    Norway
    Posts
    8,360
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    439

    Default

    Quote Originally Posted by jbarcarse View Post
    My 3GS model is MB.... so thats the old BootROM ( most likely) does that make any diff.???? lol
    Let me (yet again) explain this misconception.

    MC / MB model number on the 3GS has NOTHING to do with old or new bootrom. This rule is only valid on iPod touch devices.

    What works to determine the bootrom on a 3GS?

    Putting the 3GS in DFU mode and checking what it reports to the computer via USB. See PwnageTool 3.1.4 for Mac OS X for instructions.

    What *sometimes* gives an okay idea about bootrom version?

    Checking the serial number that the 3rd to 5th digits are 940 or lower. Eg xx940. This means the device was made before the new bootrom started to appear. Problem with this approach, some devices made after week 40 of 2009 still had the old bootrom. Also refurbished devices might get a new serial number but have the old bootrom. Finally most guides just tell people to check the 4th and 5th digits are less than 40, this ignores the year of manufacture and leads many to believe their iPhones made in 2010 have old bootrom.
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
    -

    iPad 3G 64GB (4.3.3, Redsn0w) oldest SHSH 3.2.2
    iPhone 4 32GB (4.2.1, Redsn0w JB-monte) oldest SHSH 4.1
    iPhone 3GS 32GB (4.3.3; Pwnagetool) factory unlocked oldest SHSH 3.1
    iPhone 8GB (3.1.3; Pwnagetool) AT&T Locked - Unlocked with bootneuter

    -
    Did we solve your problem? Got a dollar or two spare ? Donate!

  8. #8
    Super Moderator Array n1ckn4m3's Avatar

    Join Date
    Mar 2009
    Location
    USA
    Posts
    2,717
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    145

    Default

    Quote Originally Posted by Olethros View Post
    Let me (yet again) explain this misconception.

    MC / MB model number on the 3GS has NOTHING to do with old or new bootrom. This rule is only valid on iPod touch devices.
    Doh! Sorry about the mix-up. I had forgotten that it only impacts the iPod line and not the 3GS model.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

    Did we solve your problem? Got a dollar or two spare? Please Donate!


 

 

Similar Threads

  1. [1.1.3] Downgrade and Re-upgrade
    By H4V0C in forum iPhone "2G" (Rev. 1)
    Replies: 1
    Last Post: 02-02-2008, 11:11 PM
  2. Can you upgrade again to 1.1.2 after a 1.1.1 downgrade?
    By nikimere in forum iPhone "2G" (Rev. 1)
    Replies: 3
    Last Post: 11-12-2007, 01:23 AM
  3. Replies: 0
    Last Post: 11-09-2007, 06:18 PM
  4. Replies: 3
    Last Post: 11-02-2007, 01:46 PM
  5. can i downgrade to 1.022 then upgrade 1.11
    By jimmy83j in forum iPhone "2G" (Rev. 1)
    Replies: 1
    Last Post: 10-21-2007, 09:30 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin®
Copyright © 2014 vBulletin Solutions, Inc. All rights reserved.
Search Engine Friendly URLs by vBSEO
(c) 2006-2012 Hackint0sh.org
All times are GMT +2. The time now is 12:29 PM.
twitter, follow us!