Trouble signing in to my account. I use my email and password but the phone number isn't working or sending any code for MFA

If MFA codes are not reaching the phone number, use this checklist:

1. Avoid repeated code requests. Excessive or repetitive requests can trigger a temporary block and stop Microsoft from sending codes.
2. Check whether the phone blocks texts from unknown numbers. If it does, change that setting, then choose I don't have a code to request another code.
3. Confirm the phone can receive SMS normally. Make sure mobile service is available, the message inbox is not full, and the messaging app is working correctly.
4. Verify the number is a mobile number, not a VOIP number. VOIP numbers cannot be used to sign in or receive verification codes.
5. Verify the phone number and country/region code are correct in the account security settings. If another verification method is available, select Other verification options or Sign in another way and use that instead.
6. If this is a work or school account, go to the Security info page, select Update info, and choose a working method or I don't have any of these to replace the security info.
7. If no code arrives because of unusual activity or regional SMS delivery issues, wait and try again later instead of continuing to request codes.
8. If access to the listed phone or email is no longer possible, another verification method may be required, or access must wait until the listed method becomes available. Support agents cannot send verification codes or change account details.

If the sign-in still fails, use the sign-in helper or Contact Support.

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• Troubleshoot Microsoft verification code issues