### Answer Yes, Retell AI agents can receive SMS messages, not just send them [(1) ]() [(2) ]() . Agents can receive SMS during an active call and understand the content, including text, images, audio, and video . This works out of the box for Retell Twilio numbers and for custom telephony numbers that have passed A2P applications . For inbound SMS (starting a conversation via text) , you can create standalone SMS agents using the Chat Agent builder [(3) ]() . These agents handle fully automated SMS conversations with no voice required . Additionally, the inbound webhook allows you to process incoming SMS messages by filtering, adding context through dynamic variables and metadata, or overriding agent settings [(4) ]() .

​ To learn more, see the sources I considered: [[1] SMS Node](https://docs.retellai.com/build/conversation-flow/sms-node) [[2] Send SMS](https://docs.retellai.com/build/single-multi-prompt/send-sms) [[3] Unlock AI Texting, SMS, & Chatbots with Retell AI Agents | Retell AI | Retell AI](https://www.retellai.com/blog/unlock-ai-texting-with-retell-ai-voice-agents) [[4] Inbound webhook](https://docs.retellai.com/features/inbound-call-webhook) ​

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

### Answer Yes, this workflow is supported. You can send an SMS during a call using the SMS Node, and the agent can receive and understand SMS replies from the caller during that same active call [(1) ]() [(2) ]() . How it works: 1. **Send SMS during call**: Use the SMS Node to send an SMS asking for the email address. The SMS is sent when entering this node [(1) ]() . 2. **Receive SMS during call**: Agents can receive SMS during an active phone call and understand the content, including text, images, audio, and video. This works out of the box for Retell Twilio numbers and for custom telephony numbers that have passed A2P applications [(1) ]() [(2) ]() . Setup requirements: For sending SMS during calls, you need SMS capabilities enabled on your phone number. This includes Retell Twilio numbers and custom telephony numbers that have passed A2P applications [(1) ]() . For receiving SMS during calls, this works out of the box for Retell Twilio numbers without requiring SMS capability enablement. For custom telephony numbers, A2P application approval is needed [(2) ]() . The agent will be able to access and process the email address sent via SMS and continue the conversation with that context.

​ To learn more, see the sources I considered: [[1] SMS Node](https://docs.retellai.com/build/conversation-flow/sms-node) [[2] Send & receive SMS](https://docs.retellai.com/deploy/enable-sms) ​

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