Is there a way to upgrade to iOS4

Question

I know that iOS 6 is missing and almost everyone has iOS 6 (or atleast iOS 5+) on their devices. But one of my clients has his own theories, he wants his application to be also tested on iOS 4 (who uses iOS 4 these days !!!) ... I want to know if there is any possibility, I can lower my iPod touch / iPhone 4 / iPad 2 / iPhone 3GS (any of them) for iOS 4.

I searched this on google and found that if I have SHSH blob saved for previous versions of iOS, then I can downgrade it, but I don't have it. So is there an opportunity to downgrade?

Answer 1

Without these blobs you will not be able to lower the rating. You can always use the simulator, or show your client the adoption speed of iOS 5 as of June this year, which should convince him.

Answer 2

You will need to download Xcode 3 and iOS SDK 4. Go to this link and enter "Xcode 3" in the search bar to the left.

Answer 3

He should also remember that if you support iOS 6, then the smallest configuration with iOS 4 is version 4.3. Xcode 4.5 does not compile for any older versions.

And as mentioned, if you have not saved SHSH for any version of iOS 4, before you can get them right now. The only SHS available over Tinyumbrealla is 5.01 right now.

Answer 4

According to this page , you can downgrade your iPhone 3GS to iOS 4.1, but not 4.3 ...