Why is my iPhone 12 mini not letting me save a contact?

marifepc wrote:

iPhone wouldn’t allow me to save my correct phone number. I have a new service provider that made me use their eSIM to transfer my old number. But the eSIM number is the one on file and not my old number. What to do?

[Re-Titled by Moderator]

A question you will need to ask your new service provider.