### Answer Unfortunately, SMS capabilities in Retell AI are currently limited to US numbers only. [(1) ]() This means UK numbers cannot send SMS natively through the Retell platform at this time. Potential workaround: If you need SMS functionality with a non-US number, you could potentially: - Use an external automation platform (like Make, n8n, or Zapier) to handle SMS sending via your own telephony provider - Set this up as a custom tool that your Retell agent can trigger For other custom telephony providers, you would need to check your own telephony provider's documentation on how to enable SMS.

​ To learn more, see the sources I considered: [[1] 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.

### Answer The same limitation applies to Australian numbers—**SMS capabilities are currently limited to US numbers only**. [(1) ]() A user specifically reported trying to use an Australian Twilio number for SMS and received the error

A2P Application not found for the given phone number

because A2P registration doesn't apply to non-US regions. [(2) ]() Workaround for non-US numbers: You can use your own number that supports SMS and build a custom function on your own server to send SMS, then use a custom function in Retell to call it. [(7) ]()

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

​ To learn more, see the sources I considered: [[1] Send & receive SMS](https://docs.retellai.com/deploy/enable-sms) [[2] TEXT MESSAGE ISSUE](https://discord.com/channels/1186424376300679209/1424595052595904542) ​