my iphone 8 plus keeps saying it’s an error when trying to install IOS 14.3

Hello nae_0803,

We understand that you're running into an issue updating your iPhone, and we want to help.

Just to confirm, are you trying to update to iOS 14.3, or another version? Are you trying to update your device over Wi-Fi?

If you're unable to update your device, the steps and information on this page may help: If your iPhone, iPad or iPod touch won’t update

If you're trying to update over Wi-Fi, and you continue to run into an issue, we'd suggest trying to update your device using a computer. The "Update your device using your computer" part of this page provides those steps: Update your iPhone, iPad, or iPod touch

Take care!