You need to have an SMS/MMS plan enabled by your carrier for the SIM/eSIM that you use on your device. Apple Inc. does not provide SMS/MMS services.
- SMS/MMS Plan Requirement: To receive verification codes via SMS, you need an active SMS/MMS plan from your carrier for the SIM or eSIM in your device. Without such a plan, SMS messages, including one-time passcodes (OTPs) or verification codes, cannot be delivered.
- Apple's Role: Apple does not provide SMS/MMS services. iMessages sent through Apple’s servers are not the same as SMS/MMS and require an internet connection. This distinction is important because OTPs and verification codes are typically sent as SMS messages unless specified otherwise.
- Verification Codes via Third-Party Apps: If the verification code is generated by a third-party app (e.g., Google Authenticator, Microsoft Authenticator, Telegram), the app itself must be functional, and you must have access to it. Any issues with app-generated codes should be addressed by the app's developer or support team.
- Phone Number Accuracy: Ensure that your bank, app, or other third-party service has your correct phone number on file. A mismatch or outdated number will prevent you from receiving verification codes.
- Troubleshooting Tips:
- Confirm your SMS plan with your carrier.
- Check your device’s signal strength; poor reception can hinder SMS delivery.
- Verify that your phone number is active and properly registered with the bank, app, or service.
- Ensure the SIM/eSIM you are using is correctly set as your primary number for sending and receiving messages.
- Check for any blocked numbers or spam filtering settings that might interfere with message delivery.
By following these steps, you can address most issues with receiving verification codes.
