Knowing how to add trusted phone number to Apple ID is essential for account security, two-factor authentication, and fast recovery when you sign in on a new device.
This guide explains the exact steps, common issues, and what changes when your trusted number is no longer available.
What a trusted phone number does in Apple ID
A trusted phone number is a mobile or landline number associated with your Apple Account that can receive verification codes by text message or automated call.
Apple uses it for two-factor authentication, account recovery, and sign-in verification on devices such as iPhone, iPad, Mac, and Apple Watch.
When you sign in on a new device or make a security change, Apple may send a six-digit verification code to one of your trusted numbers or to a trusted Apple device.
Keeping at least one current phone number on file reduces the chance of being locked out.
- Receives verification codes during sign-in
- Helps you regain access if a device is lost or replaced
- Supports Apple’s two-factor authentication system
- Can be updated when you change carriers or phone numbers
How to add trusted phone number to Apple ID on iPhone or iPad
The fastest way to update your trusted number is through Settings on an Apple device signed in with your Apple ID.
The exact menu names can vary slightly by iOS or iPadOS version, but the workflow is the same.
- Open Settings.
- Tap your name at the top of the screen.
- Select Sign-In & Security.
- Tap Two-Factor Authentication or Trusted Phone Numbers, depending on your device version.
- Choose Add a Trusted Phone Number.
- Enter the new phone number.
- Choose whether you want to receive the code by Text Message or Phone Call.
- Confirm the number with the verification code sent by Apple.
If the new number will replace an old one, keep both numbers active until you confirm the new one works.
That avoids interruption during sign-in or account recovery.
How to update or remove an old trusted number
Apple lets you keep multiple trusted numbers, which is useful if you travel, switch carriers, or share account recovery duties with a family member.
If an old number is no longer reachable, remove it only after you have added and verified a replacement.
- Go to Settings and tap your name.
- Open Sign-In & Security.
- Tap Trusted Phone Numbers.
- Select the number you want to remove.
- Tap Remove or Edit, depending on your iOS version.
Before deleting the last reachable trusted number, make sure you still have access to another trusted device.
If not, account recovery may become slower and more difficult.
How to add a trusted phone number on a Mac
You can also manage trusted numbers from macOS if your Apple ID is already signed in on the Mac.
This is useful when your iPhone is unavailable.
- Open System Settings.
- Click your Apple Account name at the top of the sidebar.
- Select Sign-In & Security.
- Find Trusted Phone Numbers.
- Click Add and enter the new number.
- Verify the code Apple sends to that number.
If your Mac is running an older version of macOS, the path may appear under System Preferences instead of System Settings, but the account section and security options work the same way.
How to add a trusted phone number on the web
If you do not have access to an Apple device, you may be able to manage your account through Apple’s account website.
This is helpful when you are switching phones or setting up a new number after a carrier change.
- Go to the Apple ID sign-in page in a browser.
- Sign in with your Apple Account.
- Open the Sign-In & Security section.
- Look for trusted numbers or two-factor authentication settings.
- Add the new number and complete verification.
Web options can be more limited than device settings, especially if Apple requires you to confirm the change from a trusted device.
If the website does not offer the setting you need, use an iPhone, iPad, or Mac already signed in to the account.
What if you no longer have access to your old number?
Losing access to the old number is common after changing carriers, moving to a new country, or replacing a prepaid line.
The priority is to add a new reachable number before removing the old one, if possible.
- If you still have a trusted Apple device, use it to sign in and update the number.
- If you have a new number but no trusted device, sign in and follow Apple’s prompts for verification.
- If you cannot receive codes anywhere, start Apple Account recovery.
Apple may ask for additional identity verification before letting you change security settings.
That can include a delay period, especially if you do not have access to a trusted device or number.
Best practices for Apple Account security
A trusted phone number is only one part of a strong Apple security setup.
The goal is to make sure you can always confirm your identity without creating a single point of failure.
- Keep at least two trusted phone numbers if possible
- Use a number you control long term, not a temporary line
- Make sure your trusted devices are updated and signed in
- Review recovery contacts if Apple Account recovery is enabled
- Turn on strong passcodes and device biometrics like Face ID or Touch ID
For families, it can be helpful to assign a recovery contact or maintain at least one backup number that belongs to a trusted adult.
That reduces the risk of losing access during travel, device theft, or SIM changes.
Common problems when adding a trusted phone number
Most issues come from verification failures, unsupported number types, or account restrictions.
The following checks solve many of the common cases.
Why is Apple not sending the code?
Check that the number can receive SMS messages or calls, has signal, and is entered with the correct country code.
If the device is on Do Not Disturb, a blocked carrier route or disabled messaging service may also prevent code delivery.
Can a VoIP number work?
Apple generally expects a real phone number capable of receiving verification by text or call.
Some VoIP, virtual, or internet-based numbers may not work reliably for trusted-number purposes.
Why does Apple say the number is already in use?
The number may already be attached to another Apple Account or flagged in your security settings.
Try removing it from the other account first, or choose a different number if available.
What if verification keeps failing?
Restart the device, confirm the region and number format, and try again on a stable network.
If the issue persists, update the device software and reattempt the process from a trusted Apple device.
When to review trusted numbers again
You should review your trusted numbers after any major account or device change.
That includes switching carriers, getting a new SIM, changing your country or region, sharing devices with family, or retiring an old phone.
Regularly checking these settings takes only a minute and can prevent a lockout later.
If you use Apple services such as iCloud, App Store, Find My, Apple Pay, or iMessage, keeping your trusted number current helps those services remain accessible and secure.