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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i cant save it when i put 74.208.10.249 gs.apple.com at the bottom, why?
You need to have admin access, or login as admin.
with this mess with my phone if it's unlocked? i use it in t-mobile network
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 :/
Does thos work for iPOD Touch 3 gen 32G?
right click notepad and click run as administrator
kk i did then it says not compitable, how can i fix it??
you need to open as admin then browse though notpad to find it then save
but this doesnt work for me
this doesnt work for me windows 7 can aqny one help
i have ipod touch 3g 32g
Hi, I keep getting error 3194… Do you know what could fix this?
i keep getting the message that my ipods not compatible or something
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
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?
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
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?
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?
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!