### Answer The "We couldn't send the SMS" error during signup is a known issue, particularly for phone numbers from certain countries that are not fully supported on the platform. [(1) ]() [(2) ]() [(3) ]() Why this happens: Some countries are not supported for SMS verification unless the business has more than 10 people. [(1) ]() Workarounds that have worked for others: 1. Use a US phone number for signup – One user successfully registered using a US phone number, then switched to email verification for subsequent logins. [(2) ]() 2. Try a different phone number – Some users resolved the issue by using another phone number (even from the same country) . [(3) ]() 3. Request email verification – After initial signup, you can choose to receive verification codes by email instead of SMS for future logins. [(2) ]() Regarding WhatsApp verification: I don't have information in the available sources about WhatsApp as an alternative verification method. If the issue persists: You can email support@retellai.com with your identity verification documents (such

as business documentation or passport) to request manual verification and have the restriction lifted. [(1) ]() The phone number used for signup will only be used for the signup process itself and not for anything else like calls or agents. [(2) ]()

​ To learn more, see the sources I considered: [[1] I’m unable to complete SMS verification for my account.](https://discord.com/channels/1186424376300679209/1466896338326130943) [[2] Unable to verify phone numbers at SIGN UP for nigerian number error message "We couldn't send the SMS. Please try again later"](https://community.retellai.com/t/unable-to-verify-phone-numbers-at-sign-up-for-nigerian-number-error-message-we-couldnt-send-the-sms-please-try-again-later/423) [[3] Discord message from @pascal22_ on 2025-04-09](https://discord.com/channels/1186424376300679209/1186462578310910112/1359483512742351041) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.