I am using the built in function, the number is correct, the ai says it successfully transfers the call, but it just hangs up Call Id: c8f088ef-4e6c-4278-b0f7-5a2680941544 These are the call log details: { "role": "tool_calls", "time": 1737148689884, "message": "", "toolCalls": [ { "id": "call_7botRDkFAfIY6BCgGgrsbN6Y", "type": "function", "function": { "name": "transferCall", "arguments": "{\"destination\": \"+1315xxxxxx8\"}" } } ], "secondsFromStart": 17.961 } { "name": "transferCall", "role": "tool_call_result", "time": 1737148691319, "result": "Success.", "toolCallId": "call_7botRDkFAfIY6BCgGgrsbN6Y", "secondsFromStart": 19.396 }

@Ham I'm sorry to hear that you're experiencing issues with the transferCall function. It seems like the function was executed correctly and reported a successful transfer. However, since the call is hanging up instead of transferring, this could be due to a number of reasons such as network issues, problems with the forwarding number, or a glitch in the system. To assist you further, I would recommend checking the following: 1. Verify that the forwarding number is active and able to receive calls. 2. Ensure there are no network connectivity issues that might be causing the call to drop. 3. If possible, test the transferCall function with a different forwarding number to see if the issue persists. If after these checks the problem still occurs, please reach out to support for more in-depth troubleshooting. They may need to look into the system logs or perform additional tests to determine the cause of the issue.

@Vapi ok I will try a different forwarding number, I did verify the number and called it, currently I am testing with a trial Vapi account and a trial Twilio number, would this affect the forwarding?

@Ham Using trial accounts for both VAPI and Twilio could potentially affect the call forwarding functionality. Trial accounts often have certain limitations compared to paid accounts. For instance, Twilio trial accounts typically allow you to call and text only verified numbers, and there might be restrictions on the types of calls you can make or receive. Here are a few things to consider: 1. Ensure that the forwarding number is verified with Twilio if you're using a trial account. 2. Check for any restrictions on your VAPI trial account that might affect call forwarding. 3. Review the documentation for both services to understand any limitations or additional steps required for trial accounts. If you've confirmed that the forwarding number is verified and there are no trial account restrictions that should affect the forwarding, and the issue persists with a different forwarding number, it would be best to reach out to the support teams of both VAPI and Twilio for further assistance. They can provide more detailed guidance based on the specifics of their trial account limitations.

Same problem here, with new interface of reference API. I paidTwilio & VAPi but the result is same. The transfer is good and after that hang up

I swapped the numbers I was calling and forwarding to and it turns out the number I was forwarding to is not verified by twilio so it can not call it (trial twilio number issue)

@Ham what do you mean here: "number I was forwarding to is not verified by twilio"

when you use a trial twilio number, you can not call numbers that you have not verified by sms OTP

ah right, yea sadly the varification process didnt fix my dynamic transfer issue... ill wait for support to look at the logs. probably something simple

For me the call is forwarded to my mobile phone... and the call hang up ! 🙂

@Ham unsure if this helps your, but it fixed mine: https://discord.com/channels/1211482211119796234/1330092161835733013