View source for Downgrading iPhone 4 from iOS 7

The iPhone 4 can be downgraded to any firmware if you have the valid SHSH and aptickets. It might seem like a very simple thing to do, but the information on how to do it is scattered around all over the web and all of the below steps are necessary.

== Downgrade Steps ==

=== 1. Build a signed IPSW using iFaith ===

'''1.''' Download iFaith from http://ih8sn0w.com<br />
<blockquote>'''Note:''' This step can be performed on windows in VMware</blockquote>

'''2.''' Get your SHSH blobs ready. Tinyumbrella stores the SHSH blobs in %userprofile%\.shsh or ~/.shsh/

'''3.''' Build your firmware with iFaith and the blobs

=== 2. Downgrade iTunes to 11.0.5 ===

Since iTunes 11.1 Apple prevents downgrades, therefore you have to downgrade iTunes to 11.0.5. More details can be found here: http://blog.ih8sn0w.com/2013/09/some-updates.html

'''1.''' You can download iTunes 11.0.5 from:<br />
Windows (32 Bit): http://filehippo.com/download_itunes_32/15778/<br />
Windows (64 Bit): http://filehippo.com/download_itunes_64/15779/<br />
OS X: http://www.icj.me/ios/iTunes

'''2.''' Installation<br />
Windows:<br />
1. Use Control Panel to uninstall iTunes<br />
2. Run the downloaded installer to install iTunes<br />
OS X:
Use pacifist (http://www.charlessoft.com) to install the old version (Default installer won't let you)

=== 3. Put your iPhone 4 into pwned DFU mode ===

Windows: Use iFaith to put your iPhone 4 into DFU Mode

OS X: To actually restore the signed IPSW your iPhone 4 has to be in the pwned DFU mode. The version of redsn0w I have been trying to use did not work, therefore I recommend using ih8sn0w's iReb: http://ih8sn0w.com

It is available for OS X and windows.

<blockquote>'''Note:''' This step cannot be performed in VMWare</blockquote>

=== 4. Restore the signed IPSW ===

Windows: Once your iPhone 4 is in pwned DFU mode, simply start iTunes and shift-click the restore button. Select the signed IPSW and it should work.

OS X: Once your iPhone 4 is in pwned DFU mode, simply start iTunes and alt-click the restore button. Select the signed IPSW and it should work.

<blockquote>'''Note:''' This step cannot be performed in VMWare</blockquote>