Yes, I can help with this! That happens because Retell doesn’t support branded calling on numbers connected through SIP Trunking — the feature only appears for numbers purchased directly inside Retell. In your case, yes, branded calling would need to be handled through Twilio instead. Quick question: Are you using a Twilio US/Canada number, and do you already have A2P 10DLC registration set up on your Twilio account?