2FA Does Not Send SMS Security Code.

Question

Hello!

I hope you are all having a wonderful day.

Recently, I have attempted to add a recovery email to my current Microsoft email. However, when trying to complete such a task, as well as other security and privacy-related methods, the website uses my phone number for 2-Factor Authentication to verify my identity. However, no SMS code is given. Even stranger, when viewing my account settings, there is no phone number or specific 2FA structure listed or created. I have attempted Microsoft support, but the system did not work as intended, and agents cannot access personal account details. I would appreciate any help!

Thank you.

Answer 1

Follow these steps to troubleshoot and work around the missing SMS code for 2FA on the Microsoft account:

1. Check for common SMS delivery issues
   • Make sure the phone can receive SMS and has signal.
   • Confirm that the number is a mobile number, not VOIP. VOIP numbers cannot be used for verification codes and must be replaced with a mobile phone number.
   • If the device blocks texts from unknown senders, change the phone’s settings to allow them, then choose I don't have a code on the verification screen to trigger a new SMS.
   • Ensure the SMS inbox is not full and that the messaging app is working correctly.
2. Avoid repeated code requests
   • Excessive or repetitive requests to send codes to phone or email can cause a temporary block where Microsoft stops sending verification codes. Wait and avoid repeated attempts.
   • If there is heavy compromised traffic from the region, codes may be delayed or temporarily blocked; this usually resolves automatically after some time.
3. Verify that the phone/email info is correct
   • Even if the phone number does not appear clearly in the profile, the system may still have security info stored.
   • When prompted for verification, check that the last two digits of the phone number or first characters of the email shown match the actual info.
   • If signed in, go to the Security info page and select Update info to review or change verification methods. If a method is wrong or missing, add a working email or mobile number.
4. Use another verification method
   • If SMS is not arriving, choose another method on the verification screen (for example, backup email) if available.
   • If the page shows only the phone option and it fails, look for I don't have a code or Other verification options and select an alternate email if one is already configured.
5. Replace or add security info when current methods fail
   • If the phone number is no longer valid or not working and no code arrives, on the Verify your identity screen select I don't have any of these and follow the prompts to replace the security information.
   • Be aware: if all previous security info is removed and replaced with new info, the account may be restricted for 30 days while the new security info is verified.
6. If blocked with messages like “Try another verification method” or “We cannot send a text message to this number”
   • This can be due to:
     • Unusual activity or high volume of verification attempts.
     • Regional traffic issues.
   • To resolve:
     • Try another verification method (alternate email instead of SMS) if available.
     • Try another network (switch between Wi‑Fi and mobile data, or a different Wi‑Fi network).
     • Wait at least 24 hours without repeated attempts; if still blocked, wait longer (up to a week) before trying again.
7. If still unable to receive any verification codes
   • If no method works and codes never arrive, it may be necessary to wait until access to an existing phone/email method is possible, or to go through the account recovery flow from the sign-in page.
   • For sign-in issues, use the sign-in helper tool linked in the documentation. For additional technical help (not for changing security info or sending codes), use the Contact Microsoft Support option described in the verification-code troubleshooting article.

These steps align with how Microsoft handles verification codes and account protection, including temporary blocks and the requirement to use existing security info or replace it via the guided flow.

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References:

• Troubleshoot Microsoft verification code issues
• Common problems with two-step verification for a work or school account
• Microsoft account security info & verification codes
• Please confirm my e mail address as <removed PII>@outlook.com - Microsoft Q&A
• Where is my code? - Microsoft Q&A