MFA & Verification Issues

How to Change Two-Step Verification After Losing a SIM Card

Maira Mehtab Sep 28, 2026 869 views

Question details

The user is unable to sign into their account because two-step verification is linked to a lost SIM card, preventing them from receiving verification codes.

How to Change Two-Step Verification After Losing a SIM Card

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to log into an account or change security settings without access to the previously registered phone number.
Observed behavior: Authentication fails or blocks account access because the required two-step verification code is sent to an inaccessible phone number.

Before you start

Identify whether you are trying to recover a Microsoft 365 work/school account or a personal Microsoft account, as the required recovery procedures differ significantly.

Solution 1Recommended

Contact Your Organization's IT Administrator

If you use a Microsoft 365 business or education account, your organization's Microsoft Entra global administrator must reset your multifactor authentication (MFA).

Public forum moderators and standard support agents cannot reset passwords or multifactor authentication settings for organizational accounts due to strict security protocols. Only your internal admin has the authority to change these settings.

Reach out to your IT helpdesk

Contact the IT department or the Microsoft Entra global administrator for your organization via email, phone, or an internal support ticketing system.

Request an MFA reset

Ask your administrator to clear your old phone number from your user profile or configure your account to require re-registration for multifactor authentication.

Set up a new authentication method

Once the administrator resets your settings, sign in to your Microsoft 365 account. You will be prompted immediately to set up two-step verification using a new phone number or an authenticator app.

Contact Your Organization's IT Administrator

Admin Support: If the administrator needs technical assistance, they can open a secure support request directly through the Microsoft 365 admin center.

Solution 2

Use the Account Recovery Process for Personal Accounts

If you lost the SIM card associated with a personal Microsoft account, you must initiate a standard security info replacement through the sign-in page.

Free Microsoft Office alternative

Stay Productive with WPS Office While Recovering Your Account

Getting locked out of your Microsoft 365 account due to a lost SIM card can halt your work. While you wait for your MFA settings to be reset or for the 30-day recovery period, use WPS Office as a free, lightweight, and highly compatible alternative. You can easily view, edit, and create your documents offline without worrying about complex online verifications.

1. Download and Install: Visit the official WPS Office website to download the free productivity suite for your device.
2. Open Your Files: Launch WPS Office and directly open your existing Microsoft Word, Excel, or PowerPoint files stored locally on your computer.
3. Work Offline Seamlessly: Continue editing and saving your documents offline without needing to pass two-step verification or sign in to a cloud account.

Edit local files offline without mandatory online account verificationSeamless compatibility with Microsoft Office formats like Word (.docx), Excel (.xlsx), and PowerPoint (.pptx)Familiar and intuitive user interface requires zero learning curveFree and lightweight alternative to heavy subscription-based software

microsoft office alternative - wps office

Frequently Asked Questions

Can Microsoft public forum moderators help me change my two-step verification?

No, public forum moderators do not have the backend access or permissions required to reset passwords or change multifactor authentication (MFA) settings for any user due to data privacy policies.

What if I am the only global admin and I lost my SIM card?

If you are the sole administrator for your Microsoft 365 tenant and lose access to your primary MFA method, you will need to contact Microsoft Data Protection support via phone to verify your identity and regain access to the admin center.

How do I avoid being locked out of my account in the future?

It is highly recommended to set up at least two different verification methods. Consider using an authenticator app (which can often be backed up to the cloud) and adding a secondary backup phone number and recovery email address to your security profile.

Login & Account Issues