How do I check and update the mobile phone number on my Microsoft account?

“Phone number: None” in the profile does not by itself determine your sign-in or verification setup; review Security, and use Microsoft Authenticator or a recovery email because SMS is being phased out for personal Microsoft accounts.

Check your verification methods

1. Sign in to the Microsoft account Security page:
   https://account.microsoft.com/security
2. Select Manage how I sign in.
3. Review the methods listed under ways to prove who you are.

If no phone appears there, it is not currently registered as an SMS security-verification method. Select Add a new way to sign in or verify to see the methods available for your account. Microsoft notes that the option to add a new phone number might be unavailable; available alternatives can include a recovery email, Microsoft Authenticator, or a passkey.^1^

Microsoft is phasing out SMS authentication and account recovery for personal accounts such as Hotmail and Outlook.com, so not receiving Microsoft text messages does not necessarily indicate an account fault.^2^

Add Microsoft Authenticator instead

If Phone is not offered:

1. On Security → Manage how I sign in, select Add a new way to sign in or verify.
2. Select Use an app.
3. Install or open Microsoft Authenticator on the current phone.
4. In Authenticator, select + → Personal account → Scan a QR Code.
5. Scan the QR code displayed by the Microsoft account page and complete the verification prompt.^3^

Authenticator registration is tied to the app and device, not simply to the phone number. If Authenticator is installed but personal-account notifications are not arriving, add the account again through Add Account → Personal Microsoft Account, then sign in with the Hotmail address and password.^4^

Also add a recovery email from Add a new way to sign in or verify, so account recovery does not depend on one phone.

If you want the number as a sign-in alias

A phone alias is a username that can be used to sign in; it is separate from an SMS verification method and does not guarantee that Microsoft will send authentication texts.

If your account still displays the phone-alias option:

1. Sign in at https://account.microsoft.com/
2. Select Your info.
3. Select Manage how you sign in to Microsoft.
4. Select Add phone number.
5. Enter the mobile number and complete the verification prompt.[^5^](https://support.microsoft.com/outlook/something-went-wrong-with-error-addriverstoreaccessnonlocalexception#add-another-alias-to-your-account-and-make-it-the-primary-alias ""Something went wrong" with error ADDriverStoreAccessNonLocalException | Microsoft Support")

If Add phone number is absent, do not use the profile’s “Phone number: None” field as evidence that Authenticator is unconfigured. Manage authentication through the Security page instead.

If Microsoft reports that the number is already taken, it is associated with another Microsoft account. Depending on what the page offers, sign in to the other account and remove it before adding it here, use Transfer, or select Change number. Recently reused numbers might require a different number or a later retry.^6^

References

1. Microsoft account security info & verification codes | Microsoft Support
2. Microsoft to stop sending SMS codes for personal accounts
3. [Personal](https://support.microsoft.com/authenticator/how-to-add-your-accounts-to-microsoft-authenticator#add-authenticator-as-a-way-to-sign-in-every-time)
4. Microsoft Authenticator FAQs | Microsoft Support
5. "Something went wrong" with error ADDriverStoreAccessNonLocalException | Microsoft Support
6. Help with reusing phone numbers in a Microsoft account | Microsoft Support