### Answer --- Based on the available sources, there are a few things to check for warm transfer latency issues: Configure Agent Detection Timeout You can adjust the Agent detection timeout setting, which controls the maximum time the AI agent waits to determine whether the transfer target is a human. [(1) ]() The default is 30 seconds. If this is set too high, it could contribute to delays. Check Twilio SIP Trunk Configuration A community post reported warm transfer failures that were resolved by reconnecting the number with new credentials after Twilio logs showed "bad user credentials" errors. [(2) ]() Checking your Twilio logs for any errors and verifying your SIP trunk credentials may help. Warm Transfer 2.0 Improvements Retell AI's Warm Transfer 2.0 (released July 7, 2025) reportedly reduces handoff latency by 40% through pre-established connection pools and context pre-loading. [(3) ]() Ensure you're using the latest warm transfer implementation. Potential Areas to Review: - Verify your telephony provider (Twilio) SIP trunk settings and credentials [(2) ]() - Review the On-hold music and Human detection settings, as these add processing time during the transfer [(1) ]() - Check if Auto-greet is enabled—this makes the agent say "Hello" when the transfer target picks up, which can help detect humans faster If the issue persists after checking these settings, I'd recommend reaching out to support at [Contact Sales]() or checking the [GitHub](

ithub.com/RetellAI/) for additional troubleshooting.

​ To learn more, see the sources I considered: [[1] Call Transfer Node](https://docs.retellai.com/build/conversation-flow/call-transfer-node) [[2] Warm Transfer Issue](https://discord.com/channels/1186424376300679209/1342735519229935757) [[3] ](https://www.retellai.com/resources/ai-voice-agent-latency-face-off-2025) ​

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

Appreciate the feedback! Feel free to ask me again with additional guidance or context.