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5 Steps to Downgrade iOS 4.0 firmware to 3.1.3

Reporter: Under: iPhone On July 3, 2010 30 Comments
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Apple iOS 4.0 final release has been available for iPhone 4, 3Gs, 3G, and iPod Touch.So if you owned iDevices you can easy upgrade your iPhone OS to iOS 4.0 either via iTunes or by manually download the .ipsw file of iOS 4.0.


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Here is the manual steps to downgrade iOS 4.0 to 3.1.3. Note before starting to downgrade iOS 4: you will need the ECID SHSH certificate for firmware 3.1.3.

Steps to Downgrade iOS 4.0 firmware to 3.1.3

1- Windows users: Navigate to c:\windows\system32\drivers\etc\ then double click on the “hosts” file and open in a notepad. Mac users: Navigate to the path “/etc/” and open the hosts file with TextEdit. (I’am in Windows and using NotePad2)

2- At the end of the “Hosts” file simply add the string “74.208.10.249 gs.apple.com”.

3- Then set up your device in recovery mode by simply turn off and unplug your device from your computer >> press and hold the Home button while reconnecting the USB cable to your iPhone >> after iPhone is connected it should power on the device >> continue holding the Home button, and you will see the iTunes logo appear and then finally a “Connect to iTunes” will be displayed >> release the Home button now.

4- Now open iTunes and do a normal reset by holding down the SHIFT key (Windows) or Alt key (Mac) and clicking restore in iTunes >> now select the original 3.1.3 firmware and wait for the completion

5- So now you’ve downgraded your iPhone / iPod Touch firmware back to 3.1.3

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  On July 3, 2010(1 year, 10 months ago.)

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  • Femi

    i cant save it when i put 74.208.10.249 gs.apple.com at the bottom, why?

  • http://asif2bd.info Asif2BD

    You need to have admin access, or login as admin.

  • joe

    with this mess with my phone if it's unlocked? i use it in t-mobile network

  • Braderss

    what version of itunes should i do this with? i have 9.2 and 8.2 but my ipod is currfently synced to 9.2 :/

  • Bonefish

    Does thos work for iPOD Touch 3 gen 32G?

  • Femi2

    right click notepad and click run as administrator

  • Femi

    kk i did then it says not compitable, how can i fix it??

  • bazz1

    you need to open as admin then browse though notpad to find it then save

    but this doesnt work for me

  • bazz1

    this doesnt work for me windows 7 can aqny one help

    i have ipod touch 3g 32g

  • Zapdoszapdos

    Hi, I keep getting error 3194… Do you know what could fix this?

  • my ass is huge

    i keep getting the message that my ipods not compatible or something

  • Tommygarritty1

    mine says when i restore it with 3.1.3 it says ipod is not compatible with this firmware what do it do plzzz help

  • Wwry

    Hi, I have tried this and it does not work. After “verifying iPod restore with Apple” it tells me “could not be restored. This device isn't eligible for requested build”. What do I do wrong? What can be done?

  • Liao Leonardo

    where do i download the firmware from? I tried downloading from some sites but they wont show up when i search for them on the itunes thingy.
    (im using windows 7)

    thanks

  • lar

    downloaded file with explorer, this turns to a zip file. Changed the extension to ipsw. I get the same error as the other one. not compatible. Do you do this offline or online?

  • lar

    downloaded file with explorer, this turns to a zip file. Changed the extension to ipsw. I get the same error as the other one. not compatible. Do you do this offline or online?

  • REN

    Follow these steps….worked perfectly for my ipod touch 2G

    1. Install the latest itunes

    2.Download IOS 4.0 (save it in desktop for easy access)

    3.Download Redsn0w 0.9.5 Beta 5.

    4.Windows users: Navigate to c:windowssystem32driversetc then double click on the “hosts” file and open in a notepad. Mac users: Navigate to the path “/etc/” and open the hosts file with TextEdit.

    5.At the end of the “Hosts” file simply add the string “74.208.10.249 gs.apple.com”.

    6.Then set up your device in recovery mode by simply turn off and unplug your device from your computer >> press and hold the Home button while reconnecting the USB cable to your iPhone >> after iPhone is connected it should power on the device >> continue holding the Home button, and you will see the iTunes logo appear and then finally a “Connect to iTunes” will be displayed >> release the Home button now.

    7.Now open iTunes and do a normal reset by holding down the SHIFT key (Windows) or Alt key (Mac) and clicking restore in iTunes >> now select the 4.0 firmware and wait for the completion

    8.Once you have updated iOS 4.0 start Redsn0w 0.9.5 Beta 5.

    9.Click on Browse button and select 4.0 firmware (desktop) downloaded in step 2.

    10.Now Click on next and Redsn0w 0.9.5 Beta will prepare data for jailbreak

    11.Your iPod/iphone Touch may reboot several time once completed add http://apt.saurik.com/cydia-3.7 repo to Cydia. Now enjoy your jailbroken iPod/iphone with iOS 4!

  • Mike Dixon

    What if you didn’t back ur old 3.1.3 software on the iPod touch? Am I screwed or is there another way?

  • 95racerx

    Ok long comment. Everytime I try to downgrade this way I do it just as instructed. Open iTunes, press shift while clicking restore, then click on the firmware you want BUT everytime I click on the downloaded firmware it opens the folder and won’t let me do anything from there. What should I do?

  • Cwsoh79

    Thank you very much for the posts, now i can finally downgrade my IpodTouch 2G from iOS4.1 to iOS4.0
    i wished i had found your post earlier, this could save me 3hrs d/l all the iOS ipsw from 3.1.2 to 4.1 to try restore one by one by luck.

    Some other posts actually says that you need SHSH blobs backup to enable downgrading, but too bad i din backup last time. Luckily i found your post.

  • 1,2,watch

    you need to back up your shsh blobs,and restore ipod using tiny umbrella.have tryed restoring earlier firmware by editing host files.NO JOY.tiny umbrella worked first go

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