Have you ever noticed some of your message bubbles are blue and some are green?
Set up or remove a phone numberUse these steps to set up or remove the number for your iPhone for Messages and FaceTime on other devices. If you use this feature and share your Apple ID with someone, you can't prevent them from seeing your conversations (Instead of using the same Apple ID as someone else, set up Family Sharing).
Set upYou can set up only the phone number that belongs to your iPhone:
Joel Saltzman has over twenty years of wireless industry experience. He is currently CEO and Chief Wireless Analyst for Dr Wireless.