iMessage
Hii I am not be able to use my phone number with my iMessage
iPhone 11, iOS 14
Question marked as
Have you added the number to your Apple ID? You need to change/add the number on your Apple ID. After the change, allow up to 24 hours for the change to sync. Before trying to make the change, sign out of Messages/FaceTime on all devices/computers.
Messages or FaceTime - Add or remove your phone number
See if anything here helps.