If you see this message while attempting to install iOS 12, check your Internet connection and make sure you have a strong signal. … Then try again by tapping on Settings > General > Software Updates to try installing the update via OTA.

Why is my iOS 12 not installing?

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. … Tap the update, then tap Delete Update. Go to Settings > General > Software Update and download the latest update.

Why is there an error installing iOS?

There are chances that your network settings cause the problem of “unable to install update an error occurred installing ios 15”. Check your network settings and make sure the cellular network is turned on. You can reset your network settings in Settings > General > Reset Network Settings under the “Reset” tab.