Downgrade iOS 5.0.1 to iOS 4.3.3

You can downgrade your iPhone 4 iOS 5.0.1 to iOS 4.3.3 using the method explained below . After downgrading to iOS 4.3.3 you will be able to use the 4.3.3 untethered jailbreak using Redsnow , PwnageTool , JailbreakMe or Snowbreeze .

ios 5 downgrade ios 4.3.3

Note : iOS 4.3.3 SHSH Blobs required . SHSH Blobs can be saved using TinyUmbrella or iSHSHit tool available on Cydia for Free . iPhone Baseband is not downgraded during this process .

Steps to Downgrade iOS 5.0.1 to iOS 4.3.3 :

  1. Download iOS 4.3.3 ipsw
  2. Now go to the following directory on your PC c:/windows/system32/drivers/etc and locate the file “hosts” . Mac users go to Folder and type /etc/
  3. Open “hosts” file in notepad/text editor in Administrator mode and delete any line containing as shown in the image below . downgrade ios 5.0.1
  4. Now put your device in Pwned DFU mode using Redsnow . For doing this launch Redsn0w and go to Extras > Pwned DFU .
  5. Download TinyUmbrella and launch it . Click on “Start TSS Server” .
  6. Open iTunes . It should detect your iPhone in Recovery Mode . Press SHIFT + Restore . Browse and select the 4.3.3 firmware downloaded in Step 1
  7. If your receive iTunes error “iPhone could not be restored . An unknown error occurred Error 1” . Go to Step 8 else skip to Step 9itunes error 1 restore error
  8. Close iTunes and launch TinyUmbrella . Click on the Advance tab . Uncheck “Set Hosts to Cydia on Exit” . Launch Redsnow and go to Extras > Recovery Fix  .
  9. Now exit from Tinyumbrella and launch Redsnow . Go to Extras > Just Boot . Your device will now reboot  .
  10. You will see the pineapple logo now and your device will be downgraded to iOS 4.3.3 firmware .pineapple logo iphone 4 pwnapple
  11. Your device will now show “Connect to iTunes” screen . Launch iTunes and activate your phone .

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