I will today show you, how to downgrade your iphone 3gs, iphone 4g, ipod touch, Ipad 1.
Step : 1
Download the requierd IPSW file to which you want to downgrade to, the link is given below for your convenience:
Desired IPSW
Step : 2
Once you've downloaded the required IPSW file, its time you put you phone, ipad or ipod touch into DFU mode. The steps are as follows:
1. Connect your device with the PC or MAC
2. Turn your device off
3. Now open iTunes
4. Hold down the Power button and the Home button simultaneously for 10 seconds
5. After 10 Seconds, release the Power button but don't let go the Home button, your computer should detect a new USB device
6. At this point iTunes will also recognize your device
At this point, your device's screen should be off, if that's so, then you've successfully put your device in DFU mode.
Step : 3
Here comes the tricky and the most important part, you're going to fill iTunes into thinking that its in contact with Apple's servers, whereas we're going to change that to Saurik's server. In order to do this, Follow the steps Below :
Windows Users :
Navigate to C:\Windows\System32\drivers\etc\ and locate the file names as " Hosts ".
MAC Users :
Mac users can access the " hosts" file by navigating to "/etc/" folder, which can be found through Go > Go to Folder from within Finder.
If you're on Windows, then open the "hosts" file in Notepad. If on a Mac, then open the "hosts" file in TextEdit, and add the following line at the end:
74.208.105.171 gs.apple.com
Refer to the screenshot below if you're having any confusion:
Just save the file and close Notepad or TextEdit, and you're all set for the downgrade.
A quick note for Windows 7 and Vista users: Start Notepad with " Administrator Privileges", that can be done by right-clicking the Notepad app, and there you will see the "Administrator Privileges" option, simple click and launch.
A quick note for Mac OS X users: While saving the host file on your Mac, you should have complete read and write privileges in order to make changes. Getting a permission error? A simple workaround is to copy the host file to you Mac's desktop, from there make the changes in TextEdit, save the file and copy it back to the original location, and replace the original host file with the one which you just created.
Step : 4
Launch iTunes, choose you device from the left sidebar. Hold down the left " SHIFT " key if you're on Windows or hold down the left " alt " key if you're on a Mac and click on " Restore ", do not click anything else! A new window will pop-up asking you for the location of the IPSW file.
Navigate to the desired firmware to which you want to downgrade to, in this case it can be either iOS 4.3.3, 4.3.2, 4.3.1 or 4.2.1. Once you find the required IPSW file, click "Open" and let iTunes do its thing.
In a matter of few minutes, iTunes will install the version of iOS which you directed it to install, at this point you should see a progress bar on your device, everything is automated, therefore don't do anything silly. Your device will reboot automatically when everything is done.
In some cases, iTunes will throw 1013 error, ignore it, its perfectly normal when downgrading. At this point, your device will be in Recovery Mode with you desired version of iOS fully installed.
It will show a screen of cable and iTunes.
Its quite simple to get out of recovery mode, simply download this nifty program called TinyUmbrella along with Fix Recovery.
Once You're done downloading TinyUmbrella, launch it, and then click on the "Exit Recovery" button. In a matter of seconds, your device will boot up normally.
Once you're done with this, the last thing you're going to do is remove the line you added to the "hots" file in step3, in order to receive updates from Apple's servers normally.
Click "
Here " to
Officially Jailbreak your iDevice.
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