How To Downgrade From iOS 5 to iOS 4.3.3 For iPhone / iPod Touch


07.06.2011

How To Downgrade From iOS 5 to iOS 4.3.3 For iPhone / iPod Touch

iOS 5 beta was released at WWDC 2011, and a lot of the iPhone, iPad or iPod Touch users have installed it on their devices. A method to activate iOS 5 without being registered as a developer also hit the web, and now we present you a method to downgrade your devices from iOS 5 to iOS 4.3.3.

Apple specified in the documentation released for developers that the downgrade to iOS 4.3.3 is not possible, but if you have a SHSH for iOS 4.3.3 then you can downgrade without any problems. Unfortunately, this method won’t work for iPad 2 because when you update this device to iOS 5 will also update your baseband, so when you downgrade it to iOS 4.3.3 the tabled will enter recovery mode. The tutorial on how to downgrade from iOS 5 to iOS 4.3.3 works for iPhone 3GS, iPhone 4, 3rd and 4th generation of iPod Touch. When you update iPhone 3GS to iOS 5, the baseband is preserved.

As for iPhone 4, when you will downgrade from iOS 5 to iOS 4.3.3, the baseband is downgraded too, from 04.11.04 version to 04.10.11. But not for iPhone 3GS. In order to be able to downgrade your iPhone from iOS 5 to iOS 4.3.3 you will need SHSH in Cydia, but if you don’t have one here’s how you can save it, even without a jailbreak.

  1. First you will have to download TinyUmrebbla, which you can grab from here.

  2. Open TinyUmbrella and connect your iPhone / iPod Touch to the computer using the USB data cable.

  3. Select your device from the upper left corner of the window.

  4. From the main menu select Advanced, uncheck Request SHSH from Cydia and then press Apply Changes.

  5. Press the button located in the upper right of the window, called “Save SHSH.” Once you press it check the Log category in the main menu. If it tells you that the SHSH was successfully saved then it’s on your computer. Now close TinyUmbrella application.

Some problems with Cydia have been reported lately so there’s a chance that the SHSH not to be saved, or to be accessible in a few days or not at all. Anyway, mobile-review.ws is not responsible for the process that Cydia saves your SHSH, and we are not responsible if you can’t downgrade from iOS 5 to iOS 4.3.3 because you don’t have SHSH. With TinyUbmrella you can’t downgrade from iOS 5 to iOS 4.3.3, as Cydia is the only solution.

OK, now let’s see how you can downgrade from iOS 5 to iOS 4.3.3 with a SHSH available in Cydia:

  1. Introduce your iDevice in DFU Mode, as it’s the only way you can restore. It matters less if you have iTunes 10.5, the downgrade works on this iTunes version, too. Do put your device in DFU Mode, hold the Power button pressed for 3 seconds. Now without releasing the power button hold the Home button pressed for about 10 seconds. Now release both buttons and your iPhone / iPod Touch should be in DFU Mode.

  2. After you entered your iDevice in DFU Mode, open My Computer and navigate to C:WindowsSystem32driversetc (replace C: with the partition where Windows is installed). If on Mac OS X, then go to /etc/ folder.

  3. If opened, close iTunes.

  4. In the etc folder open the Hots file with Wordpad. Type in 74.208.105.171 gs.apple.com (don’t put “#” in front of the line) on the last row, then save to document. On Mac, open the file with the text editor and introduce the same line.

  5. Now press the Windows Start button and open command prompt, which you will open with Admin rights, so you will right-click the program and select Run as Administrator. After Command Prompt windows is opened, type in ipconfig /flushdns, press enter and close cmd prompt. For Mac OS X, in terminal type in sudo dscacheutil -flushcache (if on Leopard) or lookupd -flushcache (if on Tiger).

  6. Now open iTunes and by holding the Shift key (Option for Mac) pressed click on the Restore button. Now navigate and select iOS 4.3.3 IPSW and wait until iTunes restores your device.

  7. You will receive on error on iPhone 4 after you restore it to iOS 4.3.3, but if you downgrade an iPhone 3GS, you will receive an error as the iOS 5 baseband is preserved. To get your device out of Recovery Mode use TinyUmbrella or introduce it DFU Mode and jailbrake it.

  8. It’s possible that when you try to restore to get 3194 error. Try several times until it works if you know that you saved SHSH in Cydia for the IOS version you are trying to restore. Do not use the custom IPSW to restore, you will not be able to restore to a custom IPSW, but just to an official one.

This should be it. If you followed the steps carefully, your iPhone / iPod Touch should now be downgraded from iOS 5.

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