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If you see an error when you update or restore your iPhone, iPad, or iPod

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Question: What is Error (4000)

What is Unknown Error 4000 that didn't allow me to do latest update 11.1.2 on my new iPhone 7.

How frustrating. I have no idea why this would occur. Was doing it from iTunes as when I opened iTunes to do an import. It asked if I wanted to backup my phone and download the update and I said yes. Now after over 30 minutes I get this stupid error message so now I have to start over. Not happy. Loosing faith in apple.

Apple Watch, Mac OS X (10.2.x) , Takes for ever to setup

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Question: What is Error (4000)