Alert/Message in your settings to update the phone number associated with your Apple ID. Please check our article here to identify the steps to get rid of this alert and make your Settings app working again. In prior iOS install processes, Apple often prompted users to updates to 2FA (Two-...
This will open a pop-up window, click Install to start the download. Now depending on the browser you are using, save the downloaded installer and run it. Once the installer is downloaded, the installation will begin. Wait for it to finish. It will take a few minutes. Once the installat...