Update phone number
How do I update my iCloud phone number, no longer have access to old phone number
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From a web browser .
Go to your Apple ID account page and enter your Apple ID and password.
In the Security section, click Edit.
Click Add a Trusted Phone Number.
To add a number, enter the phone number and verify it with a text.
To remove a number, click cross sign next to the phone number you want to remove.