Deregister iMessage an phone

Hi chanda268,

Add or remove your phone number in Messages or FaceTime outlines the steps to remove a phone number in iMessage or FaceTime:

"Remove your phone number

If you don't want calls or messages for your iPhone on your iPad, iPod touch, or Mac, you can remove your phone number. There are two ways to do this:

• On your iPhone, go to Settings > Messages > Send & Receive. Select your Apple ID at the bottom of the screen and tap Sign Out. Then go to Settings > FaceTime, select your Apple ID and tap Sign Out.
• If the phone number that you want to remove belongs to an iPhone that you can't access, change your Apple ID password. This removes all phone numbers from your iPad, iPod touch, and Mac. Calls or messages for the removed numbers won't appear on those devices anymore.

If you have questions, contact Apple Support."

If you use Two-factor authentication and need to update your Apple ID, see Two-factor authentication for Apple ID:

"To see, add, or change your trusted phone numbers:

• On your iPhone, iPad, or iPod touch: Go to Settings > your name > Password & Security. Next to Trusted Phone Number, tap Edit.
• Choose Apple menu  > System Settings (or System Preferences), then click your name (or Apple ID). Click Password & Security, then add or remove a trusted phone number.
• Go to the Account Security section of appleid.apple.com."

Regards.

chanda268,

You're very welcome. Feel free to post if you ever have a question.

Take care.