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Thread: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

  1. #1
    Join Date
    Aug 2011
    Posts
    48

    Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    My iPhone 3gs phone got stuck in the recovery mode. I have tried all the solutions to solve this problem but none of them work. I also tried custom installation to firmware of 4.1 and 4.2.1 but nothing seems to work. I have used Recboot and tinyumbrella and also tried changing USB ports. Can anyone suggest a simple way of downgrading the iPhone?

  2. #2
    Join Date
    Apr 2009
    Posts
    3,974

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    I have followed following 4 steps with this:

    1: Run iReb 4.0 applications designed to convert your device, that isn’t already jailbroken, this tool is very helpful for most users that jailbreak there iDevice. It puts your phone into DFU mode.
    2: Make custom firmware 4.1 via sn0wbreeze 2.1. Flash it with the help pf iTunes.
    3: perform Jailbreak via redsn0w 0.9.6b6
    4: Then unlock the phone via ultrasnOw.
    You can download all these applications from the internet easily.

  3. #3
    Join Date
    Aug 2011
    Posts
    48

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    Thanks for the help, can you explain me what DFU mode is? What is it used for? I heard that the server with ssh will not be done with the following method that you have given

  4. #4
    Join Date
    May 2009
    Posts
    2,865

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    DFU stands for Device Firmware Update. Using the ireb 4, you can put the phone to DFU mode which is a state that you can put your iPhone into where it dosen’t load the OS or the bootloader, it just interfaces with the iTunes and is in the Firmware mode. Thus it is not loading the OS so is different from the recovery mode. It is used mostly to downgrade the firmware as you want it.

  5. #5
    Join Date
    Nov 2009
    Posts
    580

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    You can connect to the DFU mode by the following steps:
    • Launch iTunes after connecting the iPhone to your computer
    • Hold down the power button at the top of the iPhone, to turn off.
    • Hold down the sleep/power button and home button together for about 10 seconds, the njust leave the sleep button.
    • But continue holding down the Home button till a message appears. The message will tell that iTunes has detected iPhone in recoevery mode.
    The iphone screen is totlly blacnk in DFU mode, If you see any Apple logo or anything the nphone is not in DFu mode, but in std. recovery mode only.

  6. #6
    Join Date
    May 2008
    Posts
    669

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    I have tried the following steps for a more simpler downgrade IPhone 3gs/ 4.3.5 to 4.1

    1. add this file to your hosts 74.208.10.249 gs.apple.com
    2. redsn0w_win_0.9.6b6 or DFU mode for the phone
    3. iso 4.1 custom firmware on to the phone
    4. 4.1 restore is done. But you will get the error 1015 which says can’t exit recovery.
    5. Just download the s/w RecBoot 1.1 and run it.
    This method works 100%.

  7. #7
    Join Date
    Aug 2011
    Posts
    48

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    Hey, I tried the DFU mode of the phone, and now my phone is turned black which means it is in the mode. But how to remove the DFU mode? I cannot seem to go further as the phone is stuck in off state only.

  8. #8
    Join Date
    May 2008
    Posts
    4,041

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    You should just reverse out the process as you done earlier for DFU. The simplest way to exit out of DFU mode is to hold bothe the power/sleep buttons and the Home button together for some seconds while connected to iTunes. Then just leave the home button now, and keep pressing the power button as and this should reboot the device as usual. Then you can perform the other states of the problem.

  9. #9
    Join Date
    Aug 2011
    Posts
    48

    Re: Downgrade Iphone 3gs/4g from 4.3.5 to 4.1 version

    Thank You so much for the reply, I tried out the steps, and successfully jailbreaked my device. I would love to see a solution to stop the service due to stuck ion recovery modes.

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