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Thanks for tagging me <@407186325742288907>. I'll look through relevant sources and get back to you shortly.

### Answer
 I don't have information in the available sources about authentication codes or login verification for Retell AI accounts. The sources I have access to focus on SMS capabilities for AI agents (sending/receiving messages during calls and two-way SMS conversations) , not account authentication.

For account access issues like not receiving verification codes, I recommend:

1. Check the [status page](<https://status.retellai.com/>) to see if there are any ongoing service issues
2. Contact Retell AI support directly through their dashboard or at founders@retellai.com

If you're experiencing issues with SMS functionality for your AI agents (not account login) , the sources indicate that SMS capabilities require A2P application approval for US numbers, which can take 2-3 weeks [(1) ](<https://docs.retellai.com/deploy/enable-sms>) .

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To learn more, see the sources I considered:

[[1] Send & receive SMS](https://docs.retellai.com/deploy/enable-sms)
​

Feel free to tag <@1145576664366055464> with additional questions. I also appreciate feedback, it helps me improve.