I want Change phone number

Hey àñgèl,

If you have a new number but it isn't updated in your iPhone, you can do so under Settings > Phone > My Number. If you're unable to change the number there, contact your carrier for assistance.

Alternatively if you want to change the number on file for your Apple ID for use with two-factor authentication, you can do so at the Apple ID website. After signing in, you can manage your trusted number under the Account Security section.

See more info here: Change your Apple ID - Apple Support

Cheers!