MFA & Verification Issues

How to Change Microsoft Account Phone Country Code to US

Nimra Malik Oct 10, 2026 869 views

Question details

The user needs to update the phone number country code on their Microsoft account from Germany (+49) to the US (+1).

How to Change a Microsoft Account Phone Country Code from Germany to the US

Product: Microsoft Account
Device & OS: not provided
Scenario: The user is attempting to update their MFA or account recovery phone number to a new United States number.
Observed behavior: The verification field is locked to the German (+49) country code, preventing the user from directly editing the existing phone number during a sign-in prompt.

Before you start

Ensure you have access to your current Microsoft account dashboard using your password, email, or an alternative active verification method to authenticate the security changes.

Solution 1Recommended

Add a New US Number via Account Security Settings

Since the sign-in prompt often locks the country code, the best approach is to bypass the prompt, access your Microsoft account settings, add the new US number, and then remove the old German number.

Microsoft restricts editing locked verification fields during the active sign-in process for security reasons. Instead of trying to alter the country code on that specific screen, you must add a completely new sign-in method from your account's main security dashboard.

Sign in to Your Microsoft Account

Navigate to https://account.microsoft.com in your web browser and sign in using your standard email and password.

Access Security Options

Click on 'Security' or 'Your info' in the top navigation menu, then select 'Manage how you sign in' or 'Advanced security options'.

Add the New US Phone Number

Select 'Add a new way to sign in or verify'. Choose the phone number option, select the United States (+1) from the country code drop-down menu, and type in your complete US phone number.

Verify and Remove the Old Number

Complete the SMS verification for your new US number. Once it is successfully added to your account, locate your old German (+49) number in the list and click 'Remove'.

Add a New US Number via Account Security Settings

Important Formatting Tip: Do not enter '01' in place of the country code. Always select the '+1' option from the menu, followed immediately by your full 10-digit US phone number.

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Frequently Asked Questions

Why can't I edit the country code directly on the Microsoft sign-in screen?

During a sign-in or verification prompt, the country code is often locked to the number previously registered for security reasons. To change it, you must log into your main account dashboard and add a new number via the Security settings instead.

How do I correctly format a US phone number for Microsoft verification?

Select the United States (+1) from the country code drop-down list, then enter your full 10-digit area code and phone number. Never type '01' as a manual substitute for the US country code.

What should I do if I can't access my Microsoft account because the old number is required?

If the country code is locked and you cannot receive the text message to sign in, you must select 'I don't have any of these' during the verification prompt to use an alternative recovery email, or contact Microsoft Account Support for recovery assistance.

Login & Account Issues