Hmm.. the odd thing is that in the Xcode Organizer window, it lists a bunch of 
iOS versions I can "restore" to, but doesn't show me how to do it! Is it just 
taunting me?

------------------------------------------------------------------------

The version of iOS on “iPhone” does not match any of the versions of iOS 
supported for development with this installation of the iOS SDK. Please restore 
the device to a version of the OS listed below.

OS Installed on iPhone
5.0 (9A334)

Xcode Supported iOS Versions
Latest
4.3.5 (8L1)
4.3.4 (8K2)
4.3.3 (8J3)
4.3.3 (8J2)
4.3.2 (8H7)
4.3.1 (8G4)
4.3 (8F190)
4.2
4.2.1 (8C148a)
4.2.1 (8C148)
4.1
4.0
4.0.2
4.0.1
------------------------------------------------------------------------


On Oct 31, 2011, at 5:13 PM, Hunter Hillegas wrote:

> It's not technically impossible but it's difficult. You need the IPSW file 
> for the device/OS version and if it's old, you may also need the electronic 
> signature as Apple only signs the most recent build. Even if you do get it to 
> install, the baseband only goes one way so you'd be running an iOS 5 baseband 
> with iOS 4.
> 
> It's really not recommended.
> 
> On Oct 31, 2011, at 5:03 PM, Nathan Sims wrote:
> 
>> How does one restore an iPhone running iOS 5 to a previous version, say 
>> 4.3.5? iTunes only lets me reinstall iOS 5 again...
> 


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