i update my phone and my phone number wont connect to imessage

See the Apple Support article(s) below. Link to contact Apple Support at the end of the article.

Messages or FaceTime - Add or remove your phone number.    *

You also need to change/add the number on your Apple ID for other reasons such as security codes. Look in the Security section when signed in online. You may have to add the new number before you can remove the old number. 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.

Apple ID - Manage