Tested Tutorial Apple has [You must be registered and logged in to see this link.] for iPhone, iPod touch, iPad and Apple TV 2G to
patch PDF hole founded be Comex and used to jailbreak iOS devices with
JailbreakMe 3.o. Now, if you have saved SHSH blobs for iOS 4.3.3,
4.3.2 or 4.3.1, you will be able to downgrade from iOS 4.3.4 to anyone
of them.
Note: iPad 2 (3G models) are not supported on this tutorial as its baseband can't be downgraded so far.
Step 1: Download the required IPSW file to which you want to downgrade to, the links are given below for your convenience:
you’ve downloaded the required IPSW file, its time you put your
iPhone, iPad or iPod touch into DFU mode. The steps are as follows:
Step 3:
Here comes the tricky and the most important part, you’re going to
fool 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 given below:
Windows users:
Navigate to C:\Windows\System32\drivers\etc\ and locate the file named 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.
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:
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, simply 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 your 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 your 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, 4.3 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 your desired version of iOS fully installed.
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 “host” file in step 3, which is
74.208.105.171 gs.apple.com in order to receive updates from Apple’s
servers normally.
patch PDF hole founded be Comex and used to jailbreak iOS devices with
JailbreakMe 3.o. Now, if you have saved SHSH blobs for iOS 4.3.3,
4.3.2 or 4.3.1, you will be able to downgrade from iOS 4.3.4 to anyone
of them.
Note: iPad 2 (3G models) are not supported on this tutorial as its baseband can't be downgraded so far.
Step 1: Download the required IPSW file to which you want to downgrade to, the links are given below for your convenience:
- [You must be registered and logged in to see this link.]
- [You must be registered and logged in to see this link.]
- [You must be registered and logged in to see this link.]
you’ve downloaded the required IPSW file, its time you put your
iPhone, iPad or iPod touch into DFU mode. The steps are as follows:
- Connect your iPhone, iPad or iPod touch to your PC or Mac.
- Turn your device off.
- Now launch iTunes.
- Hold down the Power button and the Home button simultaneously for 10 seconds.
- After 10 seconds, release the Power button but don’t let go of the Home button, your computer should detect a new USB device.
- At this point, iTunes will also recognize your device, whether its an iPhone, iPad or iPod touch.
Step 3:
Here comes the tricky and the most important part, you’re going to
fool 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 given below:
Windows users:
Navigate to C:\Windows\System32\drivers\etc\ and locate the file named as “hosts”.
[You must be registered and logged in to see this link.]
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.
[You must be registered and logged in to see this link.]
Ifyou’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.comRefer to the screenshot below if you’re having confusion:
[You must be registered and logged in to see this link.]
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, simply 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 your 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 your 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.
[You must be registered and logged in to see this link.]
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, 4.3 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 your desired version of iOS fully installed.
[You must be registered and logged in to see this link.]
You should see a screen like the one below:[You must be registered and logged in to see this link.]
Its quite simple to get out of Recovery Mode, simply down this nifty program called TinyUmbrella ([You must be registered and logged in to see this link.], [You must be registered and logged in to see this link.]) along with Fix Recovery ([You must be registered and logged in to see this link.], [You must be registered and logged in to see this link.]).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.
[You must be registered and logged in to see this link.]
Once you’re done with this, the last thing you’re going to do is remove
the line you added to the “host” file in step 3, which is
74.208.105.171 gs.apple.com in order to receive updates from Apple’s
servers normally.