How to change phone number for iCloud

Re: How do I change my phone number for my icloud

Your Apple Account is the account you use to access Apple services like the App Store, Apple Music, iCloud, iMessage, FaceTime, and more. It includes the email address and password you use to sign in as well as the contact, payment, and security details you use across Apple services.

Try signing in to change your phone number in your Apple Account:

(It may take up to 24 hours for the update to come into effect everywhere you use it.)

Sign in to your Apple Account on the web or in your device settings - Apple Support

Eg: says:

On your iPhone:

1. "Open the Settings app.
2. Tap Apple Account at the top
3. Choose a method to sign in:

• • Use Another Apple Device: If you have another iPad or iPhone that’s signed in to your Apple Account, bring that device nearby and follow the instructions on both devices to complete the sign-in process.*
  • Sign in Manually: Enter your Apple Account email address or phone number and your password. If prompted, enter the six-digit verification code sent to your trusted device or phone number to complete the sign-in process.

Find out what to do if you can’t sign in"

" *To sign in with another Apple device, Bluetooth must be turned on for both devices and both devices need compatible software. If you can’t see the option to Use Another Apple Device or it isn’t working, update to the latest version of iOS or iPadOS on both devices."

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If needed: More info: About trusted phone numbers and trusted devices for Apple Account - Apple Support

or

If you have difficulty getting a verification code: See how to: Get a verification code and sign in with two-factor authentication - Apple Support