Downgrade iOS 5 Beta 7 to iOS 4.3.3

Follow the steps mentioned below to Downgrade iOS 5 beta 7 to iOS 4.3.3 firmware on your iPhone 4 .

ios 5 downgrade ios 4.3.3

Important Prerequisite – Need to have shsh blobs for 4.3.3 saved before trying out this downgraded tutorial .

Required Downloads :
  1. Download iOS 4.3.3 ipsw for your device.
  2. Download TinyUmbrella latest version.
  3. Fix Recovery for iOS 4.3.x (Windows)
  4. Download Zlib1.dll from following link and place it in the same directory in which fixrecovery43.exe is present.
Procedure :
  1. Connect your device to PC & open TinyUmbrella. (Fetch your available blobs)
  2. Start TSS server. TSS server might not start & give error as “inetinfo.exe” is running. Just kill the process using Task Manager & click Start TSS Server immediately.
  3. Put device into DFU mode (by following procedure). iTunes will open up & will show your device in recovery mode.
  4. Start restoring your device to 4.3.3 using shift + restore method.
  5. When restore is about to complete , iTunes will give some error and will say cannot restore your device. Please ignore it.
  6. Your device will go in recovery loop & will show recovery icon on-screen.
From here the procedure is slightly different as TinyUmbrella will not kick out device out of recovery because of extra security check by Apple.
  1. Put your iPhone into DFU mode. Do not close iTunes just yet . Let it run in the background.
  2. Launch fixrecovery43.exe and wait till it kicks your iPhone 4 out of recovery mode loop.
  3. Make sure you have a working internet connection because fix recovery will need to fetch DFU and firmware image from Apple servers.
  4. The entire procedure will take 5 to 10 mins approximate.
  5. The device will come out of recovery mode & will boot normally. Activate it with proper SIM on iTunes & you are on 4.3.3.
  6. You can close all other applications (like TinyUmbrella etc.) , if any running at this stage

This article is contributed by our reader Girish . You can also make your contribution and submit it via our Contact Page .