Why an error occurred when I want to use Apple ID for iMessage
What can I do when an error occurred when I want to use Apple ID for iMessage
iPhone XR
What can I do when an error occurred when I want to use Apple ID for iMessage
iPhone XR
You will have to try again, after checking the troubleshooting tips, in case you missed some settings:
If you can’t turn on or sign in to iMessage or FaceTime - Apple Support
Why an error occurred when I want to use Apple ID for iMessage