How to Change the Phone Number on Your Apple Account

On iPhone, go to Settings › your name › Sign-In & Security. Add the new trusted phone number, confirm the code, then remove the old one.

Which number do you mean?

Change the trusted number

1. Open Settings and tap your name.
2. Tap Sign-In & Security.
3. Next to trusted phone numbers, tap Edit.
4. Add the new number and confirm with the code.
5. Remove the old number.

On a Mac, use System Settings › your name › Sign-In & Security. You can also do this at account.apple.com.

If your sign-in is a phone number

Some Apple Accounts use a phone number as the main sign-in. To change it, go to Sign-In & Security and edit the email and phone numbers listed there. Apple sends a code to confirm the new one.

iMessage and FaceTime

Put the new SIM in, then go to Settings › Apps › Messages › Send & Receive and choose the new number. Do the same for FaceTime. Other Apple devices update after a short time.

Lost the old number already

If you can still sign in on an Apple device, you can add a new trusted number from there without the old one. If you cannot sign in at all, use account recovery at iforgot.apple.com. See recovering an iCloud account.

Add a second trusted number

Add a family member's number as a backup trusted number. It keeps you from being locked out if you lose your own phone or change numbers suddenly.

More on codes: iCloud two-factor authentication.

Changing carriers or countries

When you move abroad or switch carriers, update trusted numbers before the old SIM stops working. Apple cannot send codes to a number you no longer have.

FAQ

How do I change my iCloud phone number?

Settings › your name › Sign-In & Security, then edit trusted numbers.

Do I need the old number to change it?

Not if you are signed in on a trusted device.

How do I update iMessage to my new number?

Messages › Send & Receive, after inserting the new SIM.

Related: iCloud two-factor · recover iCloud · move iCloud to a new iPhone.