1. RyanN's Avatar
    After much frustration, I have finally managed to downgrade and re-jailbreak my 3GS. I've written a step-by-step guide and attempted this twice to confirm this works. Please let me know if this works for you. Also, if anyone is willing to try this method on any other iDevice, please let me know how it turns out. Hopefully, people will find this helpful and clear.

    DOWNGRADE, JAILBREAK & UNLOCK
    1. If you have attempted to downgrade from 3.1.3 previously, this method is almost guaranteed NOT to work UNLESS you do a fresh install of the 3.1.3 firmware via iTunes. Do this by holding the power & home key for a minute or so to put your phone into Recovery mode. Click Restore, then Restore & Update to 3.1.3.
    2. Create a back-up of your iPhone. If this downgrade doesn't work, you can always go back to this version, and you'll be able to retreive your data in the process.
    3. Bear in mind that if the downgrade is successful, you won't be able to access your backed-up content. You'll have to manually enter all your contact information, and drag all your pictures onto the device. Some may even want to note down what applications they have installed, so that they can re-download them again after the downgrade is complete.
    4. On your iPhone, go to General > Settings > About. Under 'Model' note down whether this contains "MC" or not. If it contains "MC" then your iPhone is known as a later model. If not, it is an earlier model. It is important that you remember which your iPhone is.
    5. Google "felixbruns", go to "iPod and iPhone Firmware Download" and download "iPhone 3G S (3.1.2/7011)". This will download a file called iPhone2,1_3.1.2_7D11_Restore.ipsw.
    6. Google "redsn0w" and under 'Download Links' you will be able to download redsn0w 0.9.2.
    7. Google blackra1n and download blackra1n.exe.
    8. Find Notepad in your Start Menu, right click it, and select 'Run as administrator'.
    9. In Notepad, go to File > Open and navigate to C:/Windows/System32/drivers/etc.
    10. Still in Notepad, where it says "Text Documents (*.txt)" change this to "All Files (*.*)" and select 'hosts' from the files that appear.
    11. Create a new line at the bottom of the file, and type this: 74.208.10.249 gs.apple.com
    12. Save the file you have just edited.
    13. Connect your iPhone if you haven't already, and while in iTunes, hold the Shift key on your keyboard and click the Restore button.
    14. iTunes will then allow you to select a file. Navigate to iPhone2,1_3.1.2_7D11_Restore.ipsw which you downloaded in Step 5.
    15. Allow iTunes to restore this file. It will show an error after attempting to restore - this is normal. Just click OK.
    16. Again, hold Shift and click Restore, and select the same file again. It will display an error again. Just press OK, then close iTunes.
    17. Now open the redsn0w RAR file which you downloaded in Step 6. You may need to install a program called WinRAR if you don't already have it on your computer in order to open the file. Run redsn0w.exe from the RAR file.
    18. In redsn0w, click Browse and select iPhone2,1_3.1.2_7D11_Restore.ipsw.
    19. A window will popup asking if you are using a newer iPhone. It is important that you select the correct option here. Remember: in Step 4, you had to note down whether your Model version contained "MC" or not. If they did, select Yes. If they didn't, select No.
    20. On the next screen, ensure "Install Cydia" IS NOT ticked, and "Just boot tethered right now" IS selected. Then click Next. After a few seconds, you will be able to click Finish. Meanwhile, your iPhone is still working away. After about a minute, the screen will go blank as they keypad locks.
    21. Now run blackra1n.exe which you downloaded in Step 7, and click "make it ra1n".
    22. Connect to WiFi on your iPhone.
    23. Run the blackra1n app which is now on the 2nd page of your iPhone apps. Select Cydia, Rock and sn0w, and then press Install.
    24. If your iPhone picks up a network signal, this usually means your phone is now jailbroken and unlocked. If it does not pick up a signal and it is not due to you being in a poor signal area, this means the jailbreak did not work. Start from Step 1 and if you are still having issues, restore to your latest back-up.

    Remember, if this method of jailbreaking does not work for you, it is not the end of the world. Don't get worked up about it if it fails; whatever happens, you still have a perfectly good iPod and web browser and a ton of free apps you can download from the App Store!
    03-28-2010 06:32 PM
  2. Scooter1985's Avatar
    So this will work on a iPhone 3gs with 3.1.3 and a 5.12.01 BR? If so im gonna give it a shot...
    03-28-2010 08:07 PM
  3. sschlesinger's Avatar
    Has anyone else tried this, also will this work with the newer BB 05.12.01 or is this method for people who have their 3.1.2 shsh on file with cyndia.
    03-28-2010 08:09 PM
  4. mysterio's Avatar
    Step 11 indicates the server by Saurik for saving SHSH blobs. If you have not saved your 3.1.2 SHSH blob when it was still possible, you cannot downgrade your firmware.
    03-28-2010 08:12 PM
  5. sschlesinger's Avatar
    Thats what I thought but since it wasn't clarified in the original post I had to ask.
    03-28-2010 08:15 PM
  6. Scooter1985's Avatar
    SO can this be done on a phone that has never had the SHSH saved on Cydia?
    03-28-2010 08:18 PM
  7. mysterio's Avatar
    SO can this be done on a phone that has never had the SHSH saved on Cydia?
    I don't have a 3GS unit so I can't try but reading up on Saurik's documentation seems to indicate that it can't be done.
    03-28-2010 08:25 PM
  8. Scooter1985's Avatar
    I don't have a 3GS unit so I can't try but reading up on Saurik's documentation seems to indicate that it can't be done.

    So as it is now, there is still no possible way to jail break a 3gs with 3.1.3 and a 5.12.01 BR...
    03-28-2010 08:35 PM
  9. wesiphone10's Avatar
    So has anyone tried this? I'm thinking about trying it out.

    I have an Iphone 3gs never been jailbroken firmware 3.1.3 baseband 5.12.01 Model number MB
    so should I even try?
    03-28-2010 09:07 PM
  10. Scooter1985's Avatar
    So has anyone tried this? I'm thinking about trying it out.

    I have an Iphone 3gs never been jailbroken firmware 3.1.3 baseband 5.12.07 Model number MB
    so should I even try?

    I dont think so...Try it and let me know..Im in the same boat you are...
    03-28-2010 09:08 PM
  11. wesiphone10's Avatar
    I'll wait a lil bit tonight to see if anyone else does it, or if anyone posts info. Also I'm not getting my hopes up because they have been crushed several times over.
    I'll be checking in frequently because if this works its huge news.
    03-28-2010 09:14 PM
  12. Scooter1985's Avatar
    Since no one else will try it, I guess I will....Keep check and I will let you know as soon as im done....
    03-28-2010 09:21 PM
  13. wesiphone10's Avatar
    cool, cool

    also is the error message he is talking about when you attempt and restore is that the 1600, 1604 or 1601 that we always get? and is that right
    03-28-2010 09:26 PM
  14. mysterio's Avatar
    So has anyone tried this? I'm thinking about trying it out.

    I have an Iphone 3gs never been jailbroken firmware 3.1.3 baseband 5.12.01 Model number MB
    so should I even try?

    It depends on whether you have the new bootROM. What's your serial number? (Well the 4th and 5th digits only if you don't want to disclose the whole thing).
    03-28-2010 09:39 PM
  15. big9erfan's Avatar
    - If you don't have your SHSH blobs saved on Cydia, don't bother with this
    - If you're on 3.1.3 (from iTunes) and need to unlock, don't bother with this.

    If you're upgraded to 3.1.3 you CANNOT unlock currently. Period.

    If you have the new bootrom ( ie you had a tethered jailbreak ) you can't use sn0wbreeze to create a custom 3.1.3.
    03-28-2010 09:51 PM
  16. wesiphone10's Avatar
    It depends on whether you have the new bootROM. What's your serial number? (Well the 4th and 5th digits only if you don't want to disclose the whole thing).
    the first characters are numbers the 4 and 5th in those is 2 and then 9
    03-28-2010 09:53 PM
  17. wesiphone10's Avatar
    - If you don't have your SHSH blobs saved on Cydia, don't bother with this
    - If you're on 3.1.3 (from iTunes) and need to unlock, don't bother with this.

    If you're upgraded to 3.1.3 you CANNOT unlock currently. Period.

    If you have the new bootrom ( ie you had a tethered jailbreak ) you can't use sn0wbreeze to create a custom 3.1.3.
    ive never been jailbroken before

    so i dont think i have the shsh blobs
    03-28-2010 09:55 PM
  18. mysterio's Avatar
    ive never been jailbroken before

    so i dont think i have the shsh blobs
    You're out of luck for moment then.
    03-28-2010 10:12 PM
  19. Scooter1985's Avatar
    Well, once again another fail......I run everything as said, get to the Blackra1n part and it just sits in recovery mode....2 attempts and nothing.
    03-28-2010 10:28 PM
  20. wesiphone10's Avatar
    You're out of luck for moment then.
    for the moment?
    03-28-2010 10:35 PM
  21. big9erfan's Avatar
    for the moment?
    Yes, wait till April 3rd or so and perhaps 3.2 will show up for all devices and there MAY be another jailbreak for that.
    03-28-2010 10:56 PM
  22. LVCIFER's Avatar
    I doubt that the jailbreak will be available for 3.2 upon release. It will probably take some time for them to troubleshoot everything and then release.
    03-28-2010 11:32 PM
  23. mysterio's Avatar
    I doubt that the jailbreak will be available for 3.2 upon release. It will probably take some time for them to troubleshoot everything and then release.
    Unless the exploit that they've identified is still existing in 3.2, in which case, it will be sooner than later. *sigh* If it were only that easy...
    03-29-2010 02:31 AM
  24. LVCIFER's Avatar
    I think it's likely that it does still exist.

    The hackers have the 3.2 software developers kit. These are betas of the official release. They've already examined the code.
    03-29-2010 06:20 AM
  25. Apple4life73's Avatar
    Well, once again another fail......I run everything as said, get to the Blackra1n part and it just sits in recovery mode....2 attempts and nothing.
    Thats what I expected for some reason, oh well.
    03-29-2010 01:45 PM
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