I ain't get codes to my email to change my number

Try these checks and fixes in order:

1. Confirm the right email is being used
   • Verification codes are only sent to the primary alias or an email added as a way to verify sign-in.
   • Make sure the email shown on the verification screen matches an address that is actually listed as security info on the account.
2. Check junk/spam and sender
   • Look in Junk/Spam for a message from Microsoft account protection.
   • Valid codes come from an @accountprotection.microsoft.com address.
   • Mark @accountprotection.microsoft.com as a trusted/safe sender so future codes go to the inbox.
3. Avoid repeated requests
   • Do not keep clicking “send code” repeatedly or switching methods too fast. Excessive or repetitive requests can trigger a temporary block so codes are not sent.
4. Possible temporary security block or traffic issues
   • If sign-in behavior looks unusual or there is heavy compromised traffic from the region, Microsoft may temporarily stop sending codes or delay them. This usually clears automatically after some time. Wait and try again later instead of retrying continuously.
5. If using phone/SMS as backup
   • VOIP numbers cannot be used for verification codes; ensure a mobile number is configured instead.
   • If the phone blocks texts from unknown numbers, change the phone’s settings, then choose I don't have a code to trigger a new one.
6. If still no code
   • Use a different verification method that is already on the account (another email, phone, or authenticator) to sign in and then update the number.
   • If no method works and sign-in is blocked, use the sign-in helper and then contact support from there:
     • Use the Sign-in helper to diagnose sign-in issues.
     • If needed, go to Contact Microsoft Support, enter the problem, select Get Help, then Contact Support for further assistance.
   • Support agents cannot send verification codes or change account details for security reasons, so at least one working verification method is required.

References:

• Troubleshoot Microsoft verification code issues