Possible to install Cydia with iOS SDK?

[HiFiGuy528]

Any way to downgrade from 4.1 to 4.0.1 using iOS SDK and then install Cydia via SSH into the iPhone 4?

 

[Applejuiced]

No

 

[HiFiGuy528]

What about use it to downgrade to iOS 4.0.1?

 

[lionheartednyhc]

No

 

[moussekateer]

What about use it to downgrade to iOS 4.0.1?

Do you have an iPhone 4 or 3GS? Do you have SHSH's on file for 4.0.1? If no then you can't

 

[HiFiGuy528]

Do you have an iPhone 4 or 3GS? Do you have SHSH's on file for 4.0.1? If no then you can't

Friend has a brand NEW iPhone 4 and no SHSH on file.

 

[moussekateer]

Friend has a brand NEW iPhone 4 and no SHSH on file.

Then unfortunately it's impossible to downgrade.