Ios Update Error 4000. Go to Settings > General > Software Update and download the latest update. Windows: Update to latest version of iTunes.
Tap the update, then tap Delete Update. If you still can't install the latest version of iOS or iPadOS, try downloading the update again: Go to Settings > General > [Device name] Storage. So, you can check the iOS version firstly by going to Settings > General > About.
I have no idea why this would occur.
If you don't see the update in the list of.
So, if you want to make sure that your device works fine then you should use this tool. Tap the update, then tap Delete Update. If you are using an old iTunes version, it will cause glitches during the iOS update.