Yeah, I’ve run into this before it’s typically a SIP/audio routing mismatch between Twilio and Retell AI rather than just one side failing. The constant ringing usually points to the call not being properly handed off to the agent, while the missing audio is a classic one-way RTP issue (often codec or network related). I can help you trace it through the logs and configs and get it resolved quickly—feel free to DM me @lukaxxpro