As with iOS four.three.four, you will have to now not do the improve to four.three.5 iOS but when the harm is finished, right here's an educational to downgrade from four.three.5 to iOS iOS four.three.three. Understand that you have to have saved your SHSH Blobs iOS four.three.three to try this.If ever you haven’t but made the improve to iOS four.three.5, apply our tutorial to save your SHSH Blobs iOS 4.3.3 .
If you have already backing up your SHSH Blobs iOS 4.3.3 but you made the upgrade to iOS 4.3.5, here is the tutorial to downgrade 4.3.5 to iOS iOS 4.3.3:
NOTE : This guide is not applicable for the iPhone 4S because there is no jailbreak available for this service.
Step 1: Download the iOS that you want to downgrade: 4.3.5 IOS IOS 4.3.4 4.3.3 iOS iOS 5.0
Step 2: Connect your device with your computer iOS via a USB cable. Boot Device Firmware Update (DFU) mode. To do this, you must first turn off your device, press and hold the Power + Home for 10 seconds, release the power button while holding the Home button for 10 seconds. You know when you are in DFU mode is when the screen goes completely blank.
Step 3: Navigate to Windows> System 32> drivers etc.> Windows or just etc. on OS X. Look for a file named hosts, make a backup copy of it and then open it with a text editor.
Step 4: Add the following code to the hosts and save the file:220.127.116.11 gs.apple.com
Step 5: Open iTunes and select your iOS device from the sidebar. While holding the Shift key (Windows) or Alt (on OS X), click Restore and select the firmware file you downloaded in step 1.
Step 6: You can receive 10xx error after doing this, but there is no need to worry about it.
All you need is to download a program such as TinyUmbrella or Recovery Fix, open it and click Exit to exit Recovery Fix the error. That's it! If you have followed the steps correctly, your device will now be demoted to iOS 5.0.1 firmware of your choice.
You can now jailbreak your device in the firmware as you have chosen to use JailbreakMe 3.0 if you're on iOS 4.3.3 for jailbreak untethered or tethered with redsn0w jailbreak if you're on iOS 4.3.5. iOS 5.0 can also be tethered jailbroken, or semi-tethered redsn0w using.
Last but not least, make sure you undo the changes made to the hosts file in step 4 above to begin receiving future updates iOS normally in iTunes from Apple's servers.