HT201263: If you can't update or restore your iPhone, iPad, or iPod touch

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jayla_mora

Q: how to fix error while updating/restoring iphone 4S to iOS9.2.1

I am facing error while updating or restoring my iPhone 4S to latest iOS 9.2.1.

Each time while executing step - Updating iPhone firmware..., facing error message saying "The iPhone "iPhone" could not be updated. An unknown error occurred (-1).".

Sometime error number is 3004. I have tried this with tree different window 7 based computers, without any luck.

 

Any hint to fix this!!!

iPhone 4S, iOS 9.2.1

Posted on Feb 5, 2016 11:03 PM

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Q: how to fix error while updating/restoring iphone 4S to iOS9.2.1

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