Downgrade Your iPhone Firmware Using TinyUmbrella

These are instructions on how to downgrade your iPhone firmware using TinyUmbrella. In order to follow this tutorial you must already have saved your SHSH Blobs for the firmware you want to restore to.

• Download TinyUmbrella from here and save it in a Pwnage folder on your desktop if don't have it already.
• Download the firmware you want to restore to from here and save it in a Pwnage folder on your desktop. Remember you must have saved your SHSH Blobs for this firmware already.
• Launch TinyUmbrella by double clicking its icon.
• Connect your device and make sure it lists saved SHSH Blobs for the firmware you are restoring to. You may need to click Save SHSH to restore your blobs from Cydia if you don't see any listed.

• Click the Start TSS Server button.

*Do not continue if TinyUmbrella's TSS server is not started successfully.

• Launch iTunes by clicking its icon in your Start Menu.
• Place your iPhone into DFU mode by holding down the Power and Home buttons for 10 seconds then release the Power button and continue holding the Home button for another 10 seconds.
• Select your iPhone from the list of devices on the left, hold down the Shift key and click Restore.
• Navigate to the Pwnage folder on your desktop, select the ipsw file you downloaded and click the Open button
• iTunes will now restore to the lower firmware version.

If you  get an Error 1 or you get stuck in recovery mode follow the steps below

• Download FixRecovery from here and save it to the Pwnage folder on your desktop. Then extract the archive.
• Download zlib1.dll from here and save it to the Pwnage folder on your desktop. Then extract the archive.
• Place your iPhone into DFU mode by holding down the Power and Home buttons for 10 seconds then release the Power button and continue holding the Home button for another 10 seconds.
• Double click to launch the fixrecovery43 executable we just extracted.
• FixRecovery will perform its magic after which your device will be successfully rebooted.

IMPORTANT:
 If fixrecovery does not work the first time you may need to rerestore to your desired firmware version and try again. Remember to keep the TSS Server running during your second restore as well.