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t_mac_indy Author

Level 1

23 points

Unknown error (1100) when trying to update an iPhone

I tried updating my iPhone to iOS 14.6 last night with iTunes on my computer and the update failed, and I see the iPhone restore screen on my phone. I'm trying to follow the instructions to restore and keep getting this message:

The iPhone "iPhone" could not be updated. An unknown error occurred (1100).

"More Info" leads me to this page:

https://support.apple.com/en-us/HT201263

And following the instructions there don't work either. Is there something else that I can try?

Posted on Jun 13, 2021 8:26 AM

Top-ranking reply

kamote0628

Community Specialist

Posted on Jun 14, 2021 8:52 AM

Hi t_mac_indy,

Thank you for giving us the chance to assist you with your iPhone. You can count on us to do our best to assist you or get you pointed in the right direction.

We understand that you are not able to update your device, and it is currently the recovery mode screen.

It looks like you came from the article below. Have you had the chance to try all the steps in that article on a different computer?

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

If you experience the same issue when using a different computer, we recommend that you use the "contact Apple Support" link under the "Get more help" section on that article

Take care!

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Unknown error (1100) when trying to update an iPhone

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