Hi montana267,
To set up your phone number to use with Messages, we recommend that you try the steps here: Add or remove your phone number in Messages or FaceTime - Apple Support
To perform the recommended troubleshooting steps via the link above, complete the steps in the section titled "Set up your phone number."
On your iPhone:
1. Go to Settings > Messages and make sure that iMessage is on. You might need to wait a moment for it to activate.
2. Tap Send & Receive. If you see “Use your Apple ID for iMessage,” tap it and sign in with the same Apple ID that you use on your Mac, iPad, and iPod touch.
3. In the "You can receive iMessages to and Reply From" section, make sure that your phone number and Apple ID are selected.
4. Go to Settings > FaceTime and make sure that your phone number and Apple ID are selected in the "You can be reached by FaceTime at" section.
On your other devices, you can now turn on the phone number that you just set up:
* Turn on your phone number for your Mac
* Turn on your phone number for your iPad or iPod touch
We recommend the steps above because they will show you how to use the phone number of your iPhone with Messages.
If you’re still experiencing the same issue, we recommend that you contact your wireless carrier so that they can guide you toward a resolution by looking further into this with you.
Thanks for using the Apple Support Communities.
Cheers!
