My iPhone need to update , but failed to update.

Hello John_0302,

Thanks for using Apple Support Communities. We see that you're receiving an error message when trying to update your iPhone 8 Plus. You've come to the right place! We're happy to help.

We recommend that you try to update while connected to a different Wi-Fi network. If the issue persists, use the steps in the following resource to remove the update and try again:

If your iPhone, iPad or iPod touch won't update

Let us know the results. Please include additional error messages and any other troubleshooting steps that you may have tried.

Have a wonderful day!

As iOS 14.7 is no longer current, please check for a beta profile.

If no beta profile, please check: Settings - General - iPhone Storage- look for an iOS update file here. If found, delete it and attempt the update to iOS 14.7.1.